Chronological Publications | Grouped Publications | Ph.D. Theses

2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987 and prior years

2013

Bang, Eugene, Lee, Jinsil, Lee, Jiyun, Seo, Jiwon, and Walter, Todd
Constructing Ionospheric Irregularity Threat Model for Korean SBAS
[ PAPER (in PDF) ] 
Presented April 2013 at the ION Institute of Navigation Pacific PNT Meeting in Honolulu, HI

Blanch, Juan, Walter, Todd, and Enge, Per
Results on the Optimal Detection Statistic for Integrity Monitoring
[ PAPER (in PDF) ] 
Presented January 2013 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Blanch, Juan, Walter, Todd, Phelts, R. Eric, and Enge, Per
Near Term Improvements to WAAS Availability
[ PAPER (in PDF) ] 
Presented January 2013 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Lee, Chaiwei, Chen, Yu-Hsuan, Wong, Gabriel, Lo, Sherman, and Enge, Per
Multipath Benefits of BOC vs. BPSK Modulated Signals Using On-Air Measurements
[ PAPER (in PDF) ] 
Presented January 2013 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Phelts, R. Eric, Wong, Gabriel, Walter, Todd, and Enge, Per
Signal Deformation Monitoring for Dual-Frequency WAAS
[ PAPER (in PDF) ] 
Presented January 2013 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Reid, Tyler, Walter, Todd, and Enge, Per
L1/L5 SBAS MOPS Ephemeris Message to Support Multiple Orbit Classes
[ PAPER (in PDF) ] 
Presented January 2013 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Walter, Todd, Blanch, Juan, Choi, Myungjun, Reid, Tyler, and Enge, Per
Incorporating GLONASS into Aviation RAIM Receivers
[ PAPER (in PDF) ] 
Presented January 2013 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

2012

Azoulai, L., Neri, P., Milner, C., Macabiau, C., and Walter, T.
SBAS Error Modeling for Category I Autoland
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Bang, E., Lee, J., Seo, J., Pullen, S., and Close, S.
Automated Ionosphere Front Velocity Estimation Algorithm for Ground-Based Augmentation Systems
[ PAPER (in PDF) ]  
Presented January 2012 at the ION Institute of Navigation International Technical Meeting, Newport Beach, CA

Blanch, Juan, Walter, Todd, and Enge, Per
Satellite Navigation for Aviation in 2025
[ PAPER (in PDF) ]  
Published in Proceedings of the IEEE, Vol. 100, Special Centennial Issue, pp.1821-30

Blanch, Juan, Walter, Todd, Enger, Per, Lee, Young, Pervan, Boris, Rippl, Markcus, and Spletter, Alex
Advaced RAIM User Algorithm Description: Integrity Support Message Processing, Fault Detection, Exclusion, and Protection Level Calculation
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Blanch, Juan, Walter, Todd, and Enge, Per
Optimal Positioning for Advanced RAIM
[ PAPER (in PDF) ]  
Presented January 2012 at the ION Institute of Navigation International Technical Meeting, Newport Beach, CA

Borowski, H., Isoz, O., Eklöf, F.M., Lo, S., Akos, D.
Detection of False GNSS Signals Using AGC
[ PAPER (in PDF) ]  
Published by GPS World in April 2012

Chen, Yu-Hsuan
A Study of Geometry and Commercial-Off-The-Shelf (COTS) Antennas for Controlled Reception Pattern Antenna (CRPA) Arrays
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Chen, Y-H., Juang, J-C., Seo, J., Lo, S.C., Akos, D.M., De Lorenzo, D.S., and Enge, P.
Design and Implementation of Real-time a Software Radio for Anti-Interference GPS/WAAS Sensors
[ PAPER (in PDF) ] 
Published in Sensors, No. 12, pp. 13417-40, 2012

Chu, Jiangping
Mixed One-way and Two-way Ranging to Support Alternative Position Navigation and Timing
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

De Lorenzo, David, Rife, Jason, Lo, Sherman, and Enge, Per
Calibrating Adaptive Antenna Arrays for High-Integrity GPS
[ PAPER (in PDF) ] 
Published by GPS Solutions, Vol. 16, No. 2, pp. 221-30, DOI 10.1007/s10291-011-0224-x

Gao, Grace Xingxin, Gunning, Kazuma, Walter, Todd, and Enge, Per
Impact of Personal Privacy Devices for WAAS Aviation Users
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Heng, Liang, Gao, Grace X., Walter, Todd, and Enge, Per
GPS Signal-In-Space Integrity Performance Evolution in the Last Decade: Data Mining 400,000,000 Navigation Messages from a Global Network of 400 Receivers
[ PAPER (in PDF) ] 
Published in IEEE Transactions on Aerospace and Electronic Systems, Vol. 48, No. 4, Oct 2012

Heng, Liang, Gao, Grace X., Walter, Todd, and Enge, Per
Automated Verification of Potential Signal-In-Space Anomalies Using Ground Observation Data
[ PAPER (in PDF) ] 
Presented May 2012 at the IEEE/ION Position Location and Navigation Symposium (PLANS), Monterey, CA

Heng, Liang, Gao, Grace X., Walter, Todd, and Enge, Per
Statistical Characterization of GLONASS Broadcast Clock Errors and Signal-in-Space Errors
[ PAPER (in PDF) ] 
Presented January 2012 at the ION Institute of Navigation International Technical Meeting, Newport Beach, CA

Heng, Liang, Gao, Grace X., Walter, Todd, and Enge, Per
GLONASS Signal-in-Space Anomalies Since 2009
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Kim, M., Lee, J., Pullen, S., and Gillespie, J.
Data Quality Improvements and Applications of Long-Term Monitoring of Ionospheric Anomalies for GBAS
[ PAPER (in PDF) ]  
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Lee, J., Jung, S., Kim, M., Seo, J., Pullen, S., and Close, S.
Results from Automated Ionospheric Data Analysis for Ground-Based Augmentation Systems (GBAS)
[ PAPER (in PDF) ]  
Presented January 2012 at the ION Institute of Navigation International Technical Meeting, Newport Beach, CA

Lo, Sherman, and Enge, Per
Signal Structure Study for a Passive Ranging System using Existing Distance Measuring Equipment
[ PAPER (in PDF) ] 
Presented January 2012 at the ION Institute of Navigation International Technical Meeting, Newport Beach, CA

Narins, Mitch and Lo, Sherman
The Benefits of Alternative Position, Navigation, and Timing to Aviation and Other User Communities
[ PAPER (in PDF) ] 
Published by Proceedings of the Integrated Communications Navigation and Surveillance (ICNS) Conference in Alexandria, VA, April 2012

Narins, Mitch and Lo, Sherman
The Need for a Robust Precise Time and Frequency Alternative to Global Navigation Satellite Systems
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Pullen, Sam, and Gao, Grace X.
GNSS Jamming in the Name of Privacy: Potential Threat to GPS Aviation
[ PAPER (in PDF) ] 
Published by Inside GNSS March/April 2012

Pullen, Sam, Gao, Grace, Tedeschi, Carmen, Warburton, John
The Impact of Uninformed RF Interference on GBAS and Potential Mitigations
[ PAPER (in PDF) ] 
Presented January 2012 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Seo, Jiwon, Lee, Jiyun, Pullen, Sam, Enge, Per and Close, Sigrid
Targeted Parameter Inflation within Ground-Based Augmentation Systems to Minimize Anomalous Ionospheric Impact
[ PAPER (in PDF) ]  
Published in Journal of Aircraft, Vol. 49, No. 2, March/April 2012

Walter, et al.
Innovation: Ionospheric Scintillations
[ PAPER (in PDF) ] 
Published in GPS World, April 2012

Walter, Todd, Blanch, Juan, and Enge, Per
A Framework for Analyzing Architectures that Support ARAIM
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Walter, Todd, Blanch, Juan, and Enge, Per
L1/L5 SBAS MOPS to Support Multiple Constellations
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

Walter, Todd
GNSS Augmentations: When A Signal in Space Isn't Enough
[ PAPER (in PDF) ] 
Published in Inside GNSS, September/October 2012

Wong, Gabriel, Chen, Yu-Hsuan, Phelts, R. Eric, Walter, Todd, and Enge, Per
Measuring Code-Phase Differences Due to Inter-Satellite Hardware Differences
[ PAPER (in PDF) ] 
Presented September 2012 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Nashville, TN

2011

Blanch, Juan, Walter, Todd, and Enge, Per
Optimization of a Vertical Protection Level Equation for Dual-Frequency SBAS
[ PAPER (in PDF) ] 
Presented at ION Institute of Navigation International Technical Meeting in San Diego, CA January 2011 

Blanch, Juan, Walter, Todd, and Enge, Per
A Clock and Ephemeris Algorithm for Dual-Frequency SBAS
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Blanch, Juan, Walter, Todd, Enge, Per, Waller, Stefan, Fernandez, Francisco, Dellago, Riccardo, Ioannides, Pervan, Boris, Hernandez, Ignacio, Belabbas, Boubeker, Spletter, Alexandru, and Rippl, Markus
A Proposal for Multi-Constellation Advanced RAIM for Vertical Guidance
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Chen, Yu-Hsuan, Juang, Jyh-Ching, De Lorenzo, David, Seo, Jiwon, Lo, Sherman, Enge, Per, and Akos, Dennis
Real-Time Dual-Frequency (L1/L5) GPS/WAAS Software Receiver
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Choi, Myungjun, Blanch, Juan, Walter, Todd, and Enge, Per
Advanced RAIM Demonstration using Four Months of Ground Data
[ PAPER (in PDF) ] 
Presented at ION Institute of Navigation International Technical Meeting in San Diego, CA January 2011 

Choi, Myungjun, Blanch, Juan, Akos, Dennis, Heng, Liang, Gao, Grace, Walter, Todd, and Enge, Per
Demonstrations of Multi-Constellation Advanced RAIM for Vertical Guidance Using GPS and GLONASS Signals
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR 

Gao, Grace X., Heng, Liang, Walter, Todd, and Enge, Per
Breaking the Ice: Navigation in the Arctic
[ PAPER (in PDF) ] 
Published by Inside GNSS Magazine, Vol. 6, No. 5, pp. 60-64, Sept/Oct 2011

Heng, Liang, Gao, Grace X., Walter, Todd, and Enge, Per
Digging into GPS Integrity: Charting the Evolution of GPS Signal-In-Space Performance by Data Mining 400,000,000 Navigation Messages
[ PAPER (in PDF) ] 
Published by GPS World, Vol. 22, No. 11 pp. 44-9, November 2011

Heng, Liang, Gao, Grace, Walter, Todd, and Enge, Per
Statistical Characterization of GLONASS Ephemeris Errors
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Heng, Liang, Gao, Grace, Walter, Todd, and Enge, Per
Statistical Characterization of GPS Signal-In-Space Errors
[ PAPER (in PDF) ] 
Presented January  2011 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Lee, Jiyun, Jung, Sungwook, and Pullen, Sam
Enhancements of Long Term Ionospheric Anomaly Monitoring for the Ground-Based Augmentation System
[ PAPER (in PDF) ] 
Presented January  2011 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Lee, Jiyun, Seo, Jiwon, Park, Young Shin, Pullen, Sam, and Enge, Per
Ionospheric Threat Mitigation by Geometry Screening in Ground-Based Augmentation Systems
[ PAPER (in PDF) ] 
Published in Journal of Aircraft, 2011

Lo, Sherman, and Enge, Per
Capacity Study of Two Potential Alternative Position Navigation and Timing (APNT) Technologies for Aviation
[ PAPER (in PDF) ] 
Presented January  2011 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Lo, Sherman, Peterson, Benjamin, Akos, Dennis, Narins, Mitch, Loh, Robert, and Enge, Per
Alternative Position Navigation & Timing (APNT) Based on Existing DME and UAT Ground Signals
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Pullen, Sam, and Enge, Per
Using Outage History to Exclude High-Risk Satellites from GBAS Corrections
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Pullen, Sam, Walter, Todd, and Enge, Per
SBAS and GBAS integrity for Non-Aviation Users: Moving Away from "Specific Risk"
[ PAPER (in PDF) ] 
Presented January  2011 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Pullen, Sam, Walter, Todd, and Enge, Per
Integrity for Non-Aviation Users
[ PAPER (in PDF) ] 
Published in GPS World, July 2011

Seo, Jiwon, Walter, Todd, and Enge, Per
Availability Impact on GPS Aviation Due to Ionospheric Scintillation
[ PAPER (in PDF) ] 
Published in IEEE Transactions on Aerospace and Electronic Systems, 2011

Seo, Jiwon, Walter, Todd, and Enge, Per
Correlation of GPS Signal Fades Due to Ionospheric Scintillation for Aviation Applications
[ PAPER (in PDF) ] 
Published in Advances in Space Research, No. 47, pp. 1777-88, July 2011

Seo, Jiwon, Yu-Hsuan Chen, De Lorenzo, David, Lo, Sherman, Walter, Todd, Enge, Per, Akos, Dennis, and Lee, Jiyun
A Real-Time Capable Software-Defined Receiver Using GPU for Adaptive Anti-Jam GPS Sensors
[ PAPER (in PDF) ] 
Published in Sensors, 2011

Seo, Jiwon, Yu-Hsuan Chen, De Lorenzo, David, Lo, Sherman, Enge, Per, and Akos, Dennis
Real-Time Software Receiver Using Massively Parallel Processors for GPS Adaptive Antenna Array Processing
[ PRESENTATION (in PDF) ] 
Presented January  2011 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Thoelert, Steffen, Erker, Stefan, Furthner, Johann, and Meurer, Michael (DLR German Aerospace Center), Gao, Grace X., Heng, Liang, Walter, Todd, and Enge, Per (Stanford University)
First Signal-In-Space Analysis of GLONASS K-1
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Walter, Todd, Blanch, Juan, Phelts, R. Eric, and Enge, Per
Evolving WAAS to Serve L1/L5 Users
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Wong, Gabriel, Phelts, R. Eric, Walter, Todd, and Enge, Per
Alternative Characterization of Analog Signal Deformation for GNSS-GPS Satellites
[ PAPER (in PDF) ] 
Presented January  2011 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Wong, Gabriel, Phelts, R. Eric, Walter, Todd, and Enge, Per
Bounding Errors Caused by Nominal GNSS Signal Deformations
[ PAPER (in PDF) ] 
Presented September 2011 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

2010

Becker, G.T., Lo, S.C., De Lorenzo, D.S., Enge, P.k., and Paar, C.
Secure Location Verification -- A Security Analysis of GPS Signal Authentication
[ PAPER (in PDF) ] 
Published in Proceedings of DBSec 2010, the IFIP WG 11.3 Conference on Data and Applications Security, pp. 366-73.

Blanch, Juan, Choi, Myungjun, Walter, Todd, Enge, Per, and Suzuki, Kazushi
Prototyping Advanced RAIM for Vertical Guidance
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Blanch, Juan, Walter, Todd, and Enge, Per,
RAIM with Optima Integrity and Continuity Allocations Under Multiple Fault Conditions
[ PAPER (in PDF) ] 
Published in IEEE Transactions on Aerospace and Electronic Systems, Vol. 46, No. 3, July 2010, pp. 1235-47.

Chen, Yu-Hsuan, Juang, Jyh-Ching, De Lorenzo, David, Seo, Jiwon, Lo, Sherman, Enge, Per, and Akos, Dennis
Real-Time Software Receiver for GPS Controlled Reception Pattern Array Processing
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Datta-Barua, Seebany, Lee, Jiyun, Pullen, Sam, Luo, Ming, Ene, Alexandru, Qiu, Di, Zhang, Godwin, and Enge, Per
Ionospheric Threat Parameterization for Local Area Global Positioning System-Based Aircraft Landing Systems
[ PAPER (in PDF) ] 
Published in Proceedings of the AIAA Journal of Aircraft, Vol 47, No. 4, pp. 1141-51, July-Aug. 2010

De Lorenzo, David, Lo, Sherman, Seo, Jiwon, Chen, Yu-Hsuan, and Enge, Per
The WAAS/L5 Signal for Robust Time Transfer: Adaptive Beamsteering Antennas for Satellite Time Synchronization
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Eldredge, L., Enge, P., Harrison, M., Kenagy, R., Lo, S., Loh, R., Lilly, R., Narins, M., and Niles, R.
Alternative Positioning, Navigation, and Timing (PNT) Study
[ PAPER (in PDF) ] 
International Civil Aviation Organization (ICAO) navigation Systems Panel (NSP) Working Group Meetings, Montreal, Canada May 2010

Gao, Grace X., Heng, Liang, Wong, Phelts, Eric, Gabriel, Blanch, Juan, Walter, Todd, Enge, Per, Erker, Stefan, and Thoelert, Steffen
GPS in Mid-life with an International Team of Doctors: Analyzing IIF-1 Satellite Performance and Backward Compatibility
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Heng, Liang, Gao, Grace X., Walter, Todd, and Enge, Per
GPS Ephemeris Error Screening and Results for 2006-2009
[ PAPER (in PDF) ] 
Presented January 2010 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Heng, Liang, Gao, Grace X., Walter, Todd, and Enge, Per
GPS Signal-in-Space Anomalies in the Last Decade: Data Mining of 400,000,000 GPS Navigation Messages
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Khanafseh, Samer, Yang, Fan, Pervan, Boris, Pullen, Sam, and Warburton, John
Carrier Phase Ionospheric Gradient Ground Monitor for GBAS with Experimental Validation
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Kim, Euiho, Walter, Todd, and Enge Per
Unaugmented GPS-Based Flight Inspection System
[ PAPER (in PDF) ] 
Published in IEEE Transactions on Aerospace and Electronics Systems, Vol. 46, No. 2, April 2010

Lee, Jiyun, Jung, Sungwook, Bang, Eugene, Pullen, Sam, and Enge, Per
Long Term Monitoring of Ionospheric Anomalies to Support the Local Area Augmentation System
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Lo, Sherman and Enge, Per
Authenticating Aviation Augmentation System Broadcasts
[ PAPER (in PDF) ] 
Presented May 2010 at the IEEE/ION Position Location and Navigation Symposium (PLANS), Palm Springs, CA

Lo, Sherman, Enge, Per, Niles, Frederick, Loh, Robert, Eldredge, Leo, and Narins, Mitchell
Preliminary Assessment of Alternative Navigation Means for Civil Aviation
[ PAPER (in PDF) ] 
Presented January  2010 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Murphy, Tim, Harris, Matt, Park, Young Shin, and Pullen, Sam
GBAS Differentially Corrected Positioning Service Ionospheric Anomaly Errors Evaluated in an Operational Context
[ PAPER (in PDF) ] 
Presented January  2010 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Narins, Mitch, Eldredge, Leo, Enge, Per, Harrison, Mike, Kenagy, Randy, and Lo, Sherman
Alternative Positioning Navigation and Timing
[ PAPER (in PDF) ] 
Published in Proceedings of the Royal Institute of Navigation NAV10, Westminster, London, UK November-December 2010

Park, Young Shin, Pullen, Sam, and Enge, Per
A Study of Severe Multipath Errors for the Proposed GBAS Airport Surface Movement Application
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Park, Young Shin, Pullen, Sam, and Enge, Per
Enabling LAAS Airport Surface Movement: Mitigating the Anomalous Ionospheric Threat
[ PAPER (in PDF) ] 
Presented May 2010 at the IEEE/ION Position Location and Navigation Symposium (PLANS), Palm Springs, CA

Peterson, Benjamin, Lo, Sherman, and Enge, Per
Simple Loran Cycle Error Detection Algorithms for Maritime Harbor Entrance Approach Operations
[ PAPER (in PDF) ] 
Presented January  2010 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Phelts, R. E., Gao, Grace X., Wong, Gabriel, Heng, Liang, Walter, Todd, and Enge, Per (Stanford University), Erker, Stafen, and Thoelert, Steffen (DLR-German Aerospace Center)
Aviation Grade: Chips off the Block IIF (Evaluating the IIF-1 for Aviation Users)
[ PAPER (in PDF) ] 
Published by Inside GNSS July/August 2010

Powell, J. D., and Walter, Todd
Space Weather: Its Effect on GNSS, DGPS, SBAS, and Flight Inspection
[ PAPER (in PDF) ] 
Presented June 2010 at the International Flight Inspection Symposium (IFIS), Beijing, China

Pullen, Sam, Luo, Ming, Walter, Todd, and Enge, Per
Using SBAS to Enhance GBAS User Availability: Results and Extensions to Air Traffic Management
[ PAPER (in PDF) ] 
Published in Proceedings of the ENRI International Workshop on ATM/CNS in Tokyo, Japan, September 2010

Seo, Jiwon
Overcoming Ionospheric Scintillation for Worldwide GPS Aviation
[ THESIS (in PDF) ]
Ph.D. Dissertation, Stanford University, June 2010

Suzuki, Kazushi, Pullen, Sam, Enge, Per, and Ono, Takeshi
Evaluation of Dual-Frequency GBAS Performance using Data from Public Receiver Networks
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Tang, Haochen, Pullen, Sam, Enge, Per, Grattton, Livio, Brenner, Mats, Scheitlin, and Kline, Paul
Ephemeris Type A Fault Analysis and Mitigation for LAAS
[ PAPER (in PDF) ] 
Presented at the IEEE/ION Position Location and Navigation Symposium (PLANS) in Indian Wells, CA, May 2010

Thoelert, Steffen and Erker, Stafen (DLR-German Aerospace Center), Heng, Liang, Phelts, R. E., Gao, Grace X., Wong, Gabriel, Walter, Todd, and Enge, Per (Stanford University),
On the Air: New Signals from the First GPS IIF Satellite
[ PAPER (in PDF) ] 
Published by Inside GNSS July/August 2010

Walter, Todd, Blanch, Juan, and Enge, Per
Coverage Improvement for Dual Frequency SBAS
[ PAPER (in PDF) ] 
Presented January  2010 at the ION Institute of Navigation International Technical Meeting, San Diego, CA

Walter, Todd, Blanch, Juan, and Enge, Per
Evaluation of Signal in Space Error Bounds to Support Aviation Integrity
[ PAPER (in PDF) ] 
Published in NAVIGATION, Vol. 57, No 2., Summer 2010, pp. 101-113

Walter, Todd, Blanch, Juan, and Enge, Per
Vertical Protection Level Equations for Dual-Frequency SBAS
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

Walter, Todd, Enge, Per and Blanch, Juan 
Future Augmented
[ PAPER (in PDF) ] 
Published in GPS World March 2010

Wong, Gabriel, Phelts, Eric, Walter, Todd, and Enge, Per
Characterization of Signal Deformations for GPS and WAAS Satellites
[ PAPER (in PDF) ] 
Presented September 2010 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Portland, OR

2009

Becker, Georg , Lo, Sherman, De Lorenzo, David S., Qiu, Di, Par, Christoff, and Enge, Per
Efficient Authentication Mechanisms for Navigation Systems – a Radio-Navigation Case Study
[ PAPER (in PDF) ]
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Blanch, Juan, Mayer, Christoph, Lo, Sherman Walter, Todd, Enge, Per,
Hysteresis in RAIM
[ PAPER (in PDF) ] 
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

De Lorenzo, D.S., Lo, S.C., Cohen, M., Chang, J., Inan, U.S., and Enge, P.
A Miniaturized Loran H-field Antenna for Handheld Devices,
[ PAPER (in PDF) ] 
Presented October 2009 at the International Loran Association 38^th Annual Meeting, Portland, ME

Gao, Grace X., Tang, Haochen, Blanch, Juan, Lee, Jiyun, Lo, Walter, Todd, Enge, Per
Methodology and Case Studies of Signal-in-Space Error Calculation: Top-down Meets Bottom-up
[ PAPER (in PDF) ]  [ PRESENTATION (in PDF) ] 
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Gao, Grace X., Chen, Alan, De Lorenzo, David, Lo, Walter, Todd, and Enge, Per
Compass M1 Broadcast Codes in E2,. E5b, and E6 Frequency Bands
[ PAPER (in PDF) ]
Published by IEEE Journal of Selected Topics in Signal Processing, Vol. 3., No. 4, pp. 599-612

Gao, Grace X., Heng, Liang, De Lorenzo, David, Lo, Sherman, Akos, Dennis, Chen, Alan, Walter, Todd, Enge, Per, and Parkinson, Bradford
Modernization Milestone: Observing the First GPS Satellite with an L5 Payload
[ PAPER (in PDF) ] 
Published by Inside GNSS Magazine, Vol. 3, No. 4, pp. 60-64, May/June 2009

Jan, S.S., Chan, W., and Walter, T.
MATLAB Algorithm Availability Simulation Tool
[ PAPER (in PDF) ]
Published by GPS Solutions, Vol. 13., No. 4, September 2009

Lee, Jiyun, Pullen, Sam, and Enge, Per,
Sigma Overbounding Using a Position Domain Method for the Local Area Augmentation of GPS
[ PAPER (in PDF) ] 
Published in Proceedings of the IEEE Transactions on Aerospace and Electronic Systems, Vol 45, No 4, pp. 1262-74, October 2009.

Lo, Sherman, De Lorenzo, David, Enge, Per, Akos, Dennis, and Bradley, P.
Signal Authentication: A Secure Civil GNSS for Today
[ PAPER (in PDF) ] 
Published by Inside GNSS, Sept/Oct 2009, pp. 30-9.

Lo, Sherman, Peterson, Benjamin and Enge, Per
Loran PF, SF, ASF for the Radio Technical Committee Maritime (RTCM)
[ PAPER (in PDF) ] 
Presented October 2009 at the International Loran Association 38^th Annual Meeting, Portland, ME

Lo, Sherman, Wenzel, Robert and Enge, Per
Analysis and Modeling of Skywave Behavior
[ PAPER (in PDF) ] 
Presented October 2009 at the International Loran Association 38^th Annual Meeting, Portland, ME

Park, Young Shin, Pullen, Sam, and Enge, Per
Enabling the LAAS Differentially-Corrected positioning Service (DCPS): Design and Requirements Alternatives
[ PAPER (in PDF) ]
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Phelts, R. Eric, Walter, Todd, and Enge, Per
Characterizing Nominal Analog Signal Deformations on GNSS Signals
[ PAPER (in PDF) ]
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Pullen, Sam
Providing Integrity for Satellite Navigation: Lessons Learned (Thus Far) from the Financial Collapse of 2008-2009
[ PAPER (in PDF) ] 
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Qiu, Di, Lo, Sherman, De Lorenzo, David S., and Enge, Per
Pattern Classification for Geotag Generation
[ PAPER (in PDF) ]
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Seo, Jiwon, Walter, Todd, and Enge, Per
Availability Benefit of Future Dual Frequency GPS Avionics under Strong Ionospheric Scintillation
[ PAPER (in PDF) ] 
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Tang, Haochen, Blanch, Juan, Walter, Todd, and Enge, Per
Flight Test Data Validation of Dual-Frequency GPS Measurement Error Characteristics
[ PAPER (in PDF) ]  [ PRESENTATION (in PDF) ] 
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Walter, Todd, Blanch, Juan, and Enge, Per
Evaluation of Signal-in Space Error Bounds to Support Aviation Integrity
[ PAPER (in PDF) ] 
Presented September 2009 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Pullen, Sam, Park, Young Shin and Enge, Per
Impact and mitigation of ionospheric anomalies on ground-based augmentation of GNSS
[ PAPER (hyperlink) ]
Published in the AGU Electronic Journal, Radio Science, 44, RSOA21, 2009

Lo, Sherman, Peterson, Benjamin, and Enge, Per
Assessing the Security of a Navigation System: A Case Study using Enhanced Loran
[ PAPER (in PDF) ] [ PRESENTATION (in PDF) ] 
Presented May 2009 at the European Navigation Conference GNSS, Naples, Italy

Phelts, R. Eric
Sensitivity of Code Tracking Methods to PRN Differences
[ PAPER (in PDF) ] 
Presented May 2009 at the European Navigation Conference GNSS, Naples, Italy

Seo, Jiwon, Walter, Todd, Chiou, Tsung-Yu, and Enge, Per
Characteristics of Deep GPS Signal Fading Due to Ionospheric Scintillation for Aviation Receiver Design
[ PAPER (hyperlink) ]
Published in the AGU Electronic Journal, Radio Science, 2009

De Lorenzo, D. S., Lo, S. C., Enge, P. K., Feuerstein, M., Bhattacharya, T., Spain, S., and Kang, Z.
Design and Performance of a Minimum-Variance Hybrid Location Algorithm Utilizing GPS and Cellular Received Signal Strength Inputs for Positioning in Dense Urban Environments
[ PAPER (in PDF) ] 
Presented January 2009 at the Institute of Navigation (ION) International Technical Meeting, Anaheim, CA

Qiu, Di, De Lorenzo, David, Lo, Sherman, Boneh, Dan, and Enge, Per
Physical One Way Function in Radio Navigation Sources for Positioning
[ PAPER (in PDF) ] 
Presented January 2009 at the Institute of Navigation (ION) International Technical Meeting, Anaheim, CA

Qiu, Di, Boneh, Dan, Lo, Sherman, and Enge, Per
Robust Location Tag Generation from Noisy Location Data for Security Applications
[ PAPER (in PDF) ] 
Presented January 2009 at the Institute of Navigation (ION) International Technical Meeting, Anaheim, CA

2008

Blanch, Juan, Walter, Todd and Enge, Per
Position Error Bound Calculation Using Measurement Residuals
[ PAPER (in PDF) ] 
Published in IEEE Transactions on Aerospace and Electronic Systems, Vol. 44, No. 3, July 2008

Datta-Barua, S., Mannucci, A.J., Walter, T., and Enge, P.
Altitudinal Variation of Midlatitude Localized TEC Enhancement from Ground and Space-Based Measurements
[ PAPER (in PDF) ] 
Published in Space Weather, Vol. 6, S10D06, October 2008

Datta-Barua, S., Walter, T., Blanch, J., and Enge, P.
Bounding Higher-Order Ionosphere Errors for the Dual-Frequency GPS User
[ PAPER (in PDF) ] 
Published in Radio Science, Vol. 43, RS5010, October 2008

Hsu, Po-Hsin, Chiu, Timothy, Golubev, Yuri, and Phelts, R. E.
Test Results for the WAAS Signal Quality Monitor
[ PAPER (in PDF) ] 
Presented May 2008 at the IEEE/ION Position Location and Navigation Symposium, Monterey, CA

Pullen, Sam
Satellite navigation Integrity Assurance: Lessons Learned from Hurricane Katrina
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Walter, T., Enge, P., Blanch, J., and Pervan, B.
Worldwide Vertical Guidance of Aircraft Based on Modernized GPS and New Integrity Augmentations
[ PAPER (in PDF) ] 
Published in Proceedings of the IEEE, Vol. 96, N0. 12, December 2008

Rife, J., Pullen, S., De Lorenzo, D. S., Kim, U-S., Koenig, M., Chiou, T-Y., Khanafseh, S., Kempny, B., and Pervan, B.
Navigation, Interference Suppression, and Fault Monitoring in the Sea-Based Joint Precision Approach and Landing System
[ PAPER (in PDF) ] 
Published in IEEE Proceedings, Vol. 96, No. 12., pp. 1958-75

Konovaltsev, A., De Lorenzo, David S., Hornbostel, A., and Enge, Per
Mitigation of Continuous Pulsed Radio Interference with GNSS Antenna Arrays
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Kim, Euiho, Walter, Todd, and Powell, J. David
GNSS-based Flight Inspection Systems
[ PAPER (in PDF) ] 
Presented June 2008 at the International Flight Inspection Symposium, Oklahoma City, OK

Blanch, Juan, Walter, Todd and Enge, Per
A Simple Algorithm for Dual Frequency Ground Monitoring Compatible with ARAIM
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Chiou, Tsung-Yu, Seo, Jiwon, Walter, Todd and Enge, Per
Performance of a Doppler-Aided GPS Navigation System for Aviation Applications under Ionospheric Scintillation
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Lo, Sherman, Peterson, Benjamin, Boyce, C. O. Lee and Enge, Per
The Loran Coverage Availability Simulation Tool
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Lo, Sherman, Peterson, Benjamin, Boyce, C. O. Lee and Enge, Per
The Loran Coverage Availability Simulation Tool*
[ PAPER (in PDF) ] 
Presented October 2008 at the Royal Institute of Navigation (RIN) NAV08/ International Loran Association 37^th Annual Meeting, Westminster, London, UK (*Slightly expanded version of ION paper with same title)

Peterson, Benjamin, Lo, Sherman and Enge, Per
Integrating Loran and GNSS for Safety of Life Applications
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Ramakrishnan, Shankar, Gao, Grace Xingxin, De Lorenzo, David, Walter, Todd, Enge, Per and Akos, Dennis
Design and Analysis of Reconfigurable Embedded GNSS Receivers Using Model-Based Design Tools
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Schroth, Georg, Rippl, Markus, Ene, Alexandru, Blanch, Juan, Belabbas, Boubeker, Walter, Todd, Enge, Per, and Meurer, Michael
Enhancements of the Range Consensus Algorithm (RANCO)
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Seo, Jiwon, Walter, Todd, Chiou, Tsung-Yu, Blanch, Juan, and Enge, Per
Evaluation of Deep Signal Fading Effects Due to Ionospheric Scintillation on GPS Aviation Receivers
[ PAPER (in PDF) ] 
Presented September 2008 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Savannah, GA

Gao, G. X., Akos, D., Walter, T., and Enge, P.
GIOVE-B on the Air: Understanding Galileo's New Signals
[ PAPER (in PDF) ] 
Published by Inside GNSS May/June2008

Pullen, Sam, Park, Young Shin, and Enge, Per
The Impact and Mitigation of Ionosphere Anomalies on Ground-Based Augmentation of GNSS
[ PAPER (in PDF) ]
Presented May 2008 at the 12th International Ionospheric Effects Symposium, Alexandria, VA

Seo, Jiwon, Walter, Todd, Chiou, Tsung-Yu, and Enge, Per
Characteristics of Deep GPS Signal Fading Due to Ionospheric Scintillation for Aviation Receiver Design
[ PAPER (in PDF) ]
Presented May 2008 at the 12th International Ionospheric Effects Symposium, Alexandria, VA

Park, Young Shin, Pullen, Sam, and Enge, Per
Mitigation of Anomalous Ionosphere Threat to Enhance Utility of LAAS Differentially Corrected Positioning Service (DCPS)
[ PAPER (in PDF) ]
Presented May 2008 at the IEEE/ION Position Location and Navigation Symposium, Monterey, CA

Qiu, Di, Lo, Sherman and Enge, Per.
Information Content of Loran Location-based Parameters
[ PAPER (in PDF) ]
Presented May 2008 at the IEEE/ION Position Location and Navigation Symposium, Monterey, CA

Rife, J., and Phelts, R. E.,
Formulation of a Time-Varying Maximum Allowable Error for Ground-Based Augmentation Systems
[ See IEEE Explore ] 
Published by IEEE Transactions on Aerospace and Electronic Systems, Vol. 44, No. 2, April 2008

Ene, Alexandru, Blanch, Juan, Walter, Todd and Powell, J. D.
Validation of Multiple Hypothesis RAIM Algorithm using Dual-Frequency GPS and Galileo Signals
[ PAPER (in PDF) ] 
Presented April 2008 at the European Navigation Conference GNSS/ Toulouse Space Show, Toulouse, France

Johnson, Gregory W., Swaszek, Peter F., Hartnett, Richard J., Dykstra, Ken, Shalaev, Ruslan and Lo, Sherman
Temporal Variation of Loran ASFs and their Effects on HEA Navigation
[ PAPER (in PDF) ] 
Presented April 2008 at the European Navigation Conference GNSS/ Toulouse Space Show, Toulouse, France

Lo, Sherman, Peterson, Benjamin, and Enge, Per
Using Loran for Broadcast of Integrity Information for Modernized Global Navigation Satellite Systems (GNSS)
[ PAPER (in PDF) ] 
Presented April 2008 at the European Navigation Conference GNSS/ Toulouse Space Show, Toulouse, France

Schroth, Georg, Ene, Alexandru, Blanch, Juan, Walter, Todd and Enge, Per
Failure Detection and Exclusion via Range Consensus
[ PAPER (in PDF) ] 
Presented April 2008 at the European Navigation Conference GNSS/ Toulouse Space Show, Toulouse, France

Gao, Grace Xingxin, Chen, Alan, Lo, Sherman, DeLorenzo, David, Walter, Todd, and Enge, Per
Compass M-1 Broadcast Codes and Their Application to Acquisition and Tracking
[ PAPER (in PDF) ] 
Presented January 2008 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Lo, Sherman, Wenzel, Robert, Johnson, Greg, and Enge, Per
Assessment of the Methodology for Bounding Loran Temporal ASF for Aviation
[ PAPER (in PDF) ] 
Presented January 2008 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Ramakrishnan, Shankar, Lee, Jiyun, Pullen, Sam, and Enge, Per
Targeted Ephemeris Decorrelation Parameter Inflation for Improved LAAS Availability during Severe Ionosphere Anomalies
[ PAPER (in PDF) ] 
Presented January 2008 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Walter, T., Blanch, J., Enge, P., Pervan, B., and Gratton, L.,
Future Architectures to Provide Aviation Integrity
[ PAPER (in PDF) ] 
Presented January 2008 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Jan, S. S., Gebre-Egziabher, D., Walter, T., and Enge, P.
Improving GPS-Based Landing System Performance using an Empirical Barometric Altimeter Confidence Bound
[ See IEEE Explore ] 
Published by IEEE Transactions on Aerospace and Electronic Systems, Vol. 44, No. 1, January 2008

2007

Walter, Todd, Blanch, Juan, and Enge, Per
L5 Satellite Based Augmentation Systems Protection Level Equations
[ PAPER (in PDF) ]
Presented December 2007 at the International Global Navigation Satellite Systems (IGNSS) Symposium, Sydney, Australia

Lo, Sherman, Peterson, B., and Enge, P.
Proving the Integrity of the Weighted Sum Squared Error (WSSE) Loran Cycle Confidence Algorithm
[ See ION Website ] 
Published by Navigation: The Journal of the Institute of Navigation, Vol 54, Number 4, 2007

Pullen, Sam
Worldwide Trends in GNSS Development and their Implications for Civil User Performance and Safety
[ PAPER (in PDF) ]
Presented November 2007 at the Japan GNSS/GPS Symposium, Tokyo, Japan

Lo, Sherman, Peterson, B., and Enge, P.
Loran Data Modulation: A Primer
[ See IEEE Explore ] 
Published by IEEE Aerospace and Electronic Systems Magazine, Tutorial IV, September 2007

Gao, G. X., Chen, A. Lo, S., De Lorenzo, D. S., and Enge, P.
The Compass MEO Satellite Codes
[ PAPER (in PDF) ] 
Published by Inside GNSS July/August 2007, pp. 36-43

Qiu, Di. Lo, Sherman, and Enge, Per
Security for Insecure Times: Geoenryption with Loran
[ PAPER (link to GPS World) ] 
Published by GPS World November 2007

Lo, Sherman, Peterson, B., Swaszek, P., and Enge, P.
Loran Data Modulation: Extensions and Examples
[ See IEEE Explore ] 
Published by IEEE Transactions on Aerospace Electronic Systems, April 2007

Lo, Sherman, Johnson, G., Swaszek, P., Wenzel, R. Morris, P., and Enge, P.
Using Seasonal Monitor Data to Assess Aviation Integrity
[ PAPER (in PDF) ] 
Presented October 2007 at the International Loran Association 36^th Annual Meeting, Orlando, FL

Qiu, Di, Lo, S., and Enge, P.
Geoencryption on Loran
[ PAPER (in PDF) ] 
Presented October 2007 at the International Loran Association 36^th Annual Meeting, Orlando, FL

Swaszek, P., Johnson, G., Hartnett, R., and Lo, S.
An Investigation into the Temporal Correlation at the ASF Monitor Sites
[ PAPER (in PDF) ] 
Presented October 2007 at the International Loran Association 36^th Annual Meeting, Orlando, FL

Blanch, Juan, Ene, Alex, Walter, Todd, and Enge, Per
An Optimized Multiple Hypothesis RAIM Algorithm for Vertical Guidance
[ PAPER (in PDF) ] 
Presented September 2007 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Chiou, Tsung-yu
On the Probability Density Function and Stability Properties for a Cross-Product Frequency-Locked Loop
[ PAPER (in PDF) ]
Presented September 2007 at the Institute of Navigation GNSS Conference, Fort Worth, TX

Datta-Barua, Seebany, Walter, Todd, Pullen, Sam, and Enge, Per
Modeling the 20 November 2003 Ionosphere Storm with GRACE
[ PAPER (in PDF) ] 
Presented September 2007 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Gao, Grace Xingxin
DME/TACAN Interference and its Mitigation in L5/E5 Bands
[ PAPER (in PDF) ] 
Presented September 2007 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Konno, Hiroyuki
Dual-Frequency Smoothing for CAT III LAAS: Performance Assessment Considering Ionosphere Anomalies
[ PAPER (in PDF) ] 
Presented September 2007 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Park, Young Shin, Zhang, G., Pullen, S., Lee, J. and Enge, P.
Data-Replay Analysis of LAAS Safety during Ionosphere Storms
[ PAPER (in PDF) ] 
Presented September 2007 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Qiu, Di
Security Analysis of Geoencryption: A Case Study Using Loran
[ PAPER (in PDF) ] 
Presented September 2007 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Quigley, M., Abbeel, P., De Lorenzo, D. S., Gu, Y., Bolouki, S., Akos, D. M., and Ng, A. Y.
Portable GPS Baseband Logging
[ PAPER (in PDF) ] 
Presented September 2007 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Seo, Jiwon, Walter, Todd, Marks, Edward, Chiou, Tsung-Yu, and Enge, Per
Ionospheric Scintillation Effects on GPS Receivers during Solar Minimum and Maximum
[ PAPER (in PDF) ] 
Presented June 2007 at the International Beacon Satellite Symposium, Boston, MA

Do, Ju-Yong, Rabinowitz, Matthew and Enge, Per
Robustness of TOA and TDOA Positioning under Sub-Optimal Weighting Conditions
[ See IEEE Explore ] 
Published by IEEE Transactions on Aerospace Electronic Systems 2007

De Lorenzo, D. S., Antreich, F., Denks, H., Hornbostel, A., Weber, C., and Enge, P.
Adaptive Beamsteering for Interference Rejection in GNSS Receivers
[ PAPER (in PDF) ] 
Presented May 2007 at the European Navigation Conference GNSS/TimeNav 2007, Geneva, Switzerland

Ene, Alexandru
Multiple Hypothesis RAIM with Real-Time FDE and Forecasted Availability for Combined Galileo-GPS Vertical Guidance
[ PAPER (in PDF) ] 
Presented May 2007 at the European Navigation Conference GNSS/TimeNav 2007, Geneva, Switzerland

Grace Xingxin Gao, David S. De Lorenzo, Todd Walter and Per Enge
Acquisition and Tracking of GIOVE-A Broadcast L1/E5/E6 Signals and Analysis of DME/TACAN Interference on Receiver Design
[ PAPER (in PDF) ] 
Presented May 2007 at the European Navigation Conference GNSS/TimeNav 2007, Geneva, Switzerland

Kim, Euiho, Walter, Todd and J.D. Powell
Standalone GPS-Based Flight Inspection System
[ PAPER (in PDF) ] 
Presented May 2007 at the European Navigation Conference GNSS/TimeNav 2007, Geneva, Switzerland

Phelts, R. Eric
Range Biases on Modernized GNSS Codes
[ PAPER (in PDF) ] 
Presented May 2007 at the European Navigation Conference GNSS/TimeNav 2007, Geneva, Switzerland

Gao, Grace Xingxin, Datta-Barua, Seebany, Walter, Todd, and  Enge, Per
Frequency Band Sensitive Ionosphere Modeling for Wideband GNSS Signals
[ PAPER (in PDF) ] 
Presented April 2007 at the ION Institute of Navigation Annual Meeting, Cambridge , MA

Kim, Euiho, Walter, Todd and J.D. Powell
WAAS-Based Flight Inspection System
[ PAPER (in PDF) ] 
Presented April 2007 at the ION Institute of Navigation Annual Meeting, Cambridge , MA

Blanch, Juan, Todd Walter, and Per Enge
Understanding PHMI for Safety of Life Applications
[ PAPER (in PDF) ]
Presented January 2007 at the Institute of Navigation National Technical Meeting, San Diego, CA

Chiou, Tsung-Yu, Walter, Todd, Gebre-Egziahber, Demoz,  Akos, Dennis, and Enge, Per
Performance of an Inertial Aided FLL-Assisted-PLL Carrier-Tracking Loop in the Presence of Ionospheric Scintillations
[ PAPER (in PDF) ]
Presented January 2007 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Do, Ju-Yong, Rabinowitz, Matthew and Enge, Per
Multi-Fault Tolerant RAIM Algorithm for Hybrid GPS/TV Positioning
[ PAPER (in PDF) ] 
Presented January 2007 at the ION Institute of Navigation National Technical Meeting, San Diego, CA 

Ene, Alexandru, Blanch, Juan, and Powell, J. David
Fault Detection and Elimination for Galileo-GPS Vertical Guidance
[ PAPER (in PDF) ] 
Presented January 2007 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Gao, Grace, De Lorenzo, David, Lo, Sherman, Akos, Dennis, Chen, Alan, Walter, Todd, and Enge, Per
Galileo Broadcast E5 Codes and Applying the Codes for Acquisition and Tracking
[ PAPER (in PDF) ] 
Presented January 2007 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Kim, Euiho, Walter, T., and Powell, J. D.
Adaptive Carrier Smoothing using Code and Carrier Divergence
[ PAPER (in PDF) ] 
Presented January 2007 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Lo, Sherman, Peterson, Benjamin, and Enge, Per
Proving the Integrity of the Weighted Sum Squared Error (WSSE) Loran Cycle Confidence Algorithm
[ PAPER (in PDF) ] 
Presented January 2007 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Qiu, Di, Lo, Sherman, Peterson, Benjamin, and Enge, Per
Geoencryption Using Loran
[ PAPER (in PDF) ]  
Presented January 2007 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

Zhang, Godwin, Lee, Jiyun, Datta-Barua, Seebany, Pullen, S., and Enge, Per
Low-Elevation Ionosphere Spatial Anomalies Discovered from the 20 November 2003 Storm
[ PAPER (in PDF) ]  
Presented January 2007 at the ION Institute of Navigation National Technical Meeting, San Diego, CA

2006 ( Top )

Phelts, R. Eric, and Akos, D.
Effects of Signal Deformations on Modernized GNSS Signals
[ PAPER (in PDF) ]
Journal of Global Positioning Systems Vol.5 No.1-2, 2006

Boyce, C.O.L., Lo, S., Powell, J. D., and Enge, P.
Analysis of Noise and Cycle Selection in a Loran Receiver
[ PAPER (in PDF) ] 
Presented October 2006 at the International Loran Association 35^th Annual Meeting, Groton, CT

Lo, Sherman., Peterson, B., and Enge, P.
Assessing the Loran Cycle Confidence Algorithm
[ PAPER (in PDF) ] 
Presented October 2006 at the International Loran Association 35^th Annual Meeting, Groton, CT

Lo, Sherman, and Enge, P.
Preliminary Assessment of Loran for Required Navigation Performance 1.0
[ PAPER (in PDF) ] 
Presented October 2006 at the International Loran Association 35^th Annual Meeting, Groton, CT

Boyce, C.O.L., Lo, S., Powell, J. D., and Enge, P.
Atmospheric Noise: Data Collection and Analysis
[ PAPER (in PDF) ] 
Presented September 2006 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Datta-Barua, Seebany, Walter, Todd, Blanch, Juan, and Enge, Per
Bounding Higher Order Ionosphere Errors for the Dual Frequency GPS User
[ PAPER (in PDF) ] 
Presented September 2006 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Ene, Alexandru
Further Development of Galileo-GPS RAIM for Vertical Guidance
[ PAPER (in PDF) ] 
Presented September 2006 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

De Lorenzo, D,  Rife, J., Enge, P., and Akos, D.
Navigation Accuracy and Interference Rejection for an Adaptive GPS Antenna Array
[ PAPER (in PDF) ]  [ PRESENTATION (in PDF) ]
Presented September 2006 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Gao, Grace, Spilker, James, Walter, Todd, Enge, Per, and Pratt, Anthony
Code Generation Scheme and Property Analysis of Broadcast Galileo L1 and E6 Signals
[ PAPER (in PDF) ] 
Presented September 2006 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Lee, Jiyun, Luo, M. Pullen, S., Park, Y. S., Enge, P., and Brenner, M.
Position-Domain Geometry Screening to Maximize LAAS Availability in the Presence of Ionosphere Anomalies
[ PAPER (in PDF) ]
Presented September 2006 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Kim, Euiho, Walter, T., and Powell, J. D.
Optimizing WAAS Accuracy/Stability for a Single Frequency Receiver
[ PAPER (in PDF) ]
Presented September 2006 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Konno, H, Pullen, S., Rife, J. and Enge, P.
Ionosphere Monitoring Methodology for Hybrid Dual-Frequency LAAS
[ PAPER (in PDF) ]
Presented September 2006 at the ION Institute of Navigation Global Navigation Satellite Systems Conference, Fort Worth, TX

Kim, Euiho, Walter, T., and Powell, J. D.
WAAS-Aided Flight Inspection Truth System
[ PAPER (in PDF) ]
Presented June 2006 at the 14th International Flight Inspection Symposium (IFIS), Toulouse, France

Walter, T., and Powell, J. D.
Flight Inspection of GNSS SBAS Procedures
[ PAPER (in PDF) ]
Presented June 2006 at the 14th International Flight Inspection Symposium (IFIS), Toulouse, France 

Do, Ju-Yong, Rabinowitz, M., and Enge, P.
Performance Measurements of Combined GPS and TV Signal Based Positioning System in San Francisco Bay Area
[ PAPER (in PDF) ]
Presented April 2006 at the IEEE/ION Position Location and Navigation Symposium, San Diego, CA

Kim, Euiho, Peled, Uri, Walter, Todd and J.D. Powell
A Development of WAAS-Aided Flight Inspection System
[ PAPER (in PDF) ]
Presented April 2006 at the IEEE/ION Position Location and Navigation Symposium, San Diego, CA

Lee, Jiyun, Pullen, S., Datta-Barua, S., and Enge, P.
Assessment of Nominal Ionosphere Spatial Decorrelation for LAAS
[ PAPER (in PDF) ]
Presented April 2006 at the IEEE/ION Position Location and Navigation Symposium, San Diego, CA

Pullen, Sam, Rife, J., Enge, P.
Prior Probability Model Development to Support System Safety Verification in the Presence of Anomalies
[ PAPER (in PDF) ]
Presented April 2006 at the IEEE/ION Position Location and Navigation Symposium, San Diego, CA

Rife, Jason, Pullen, S., Walter, T., Phelts, E., Pervan, B., Enge, P.
WAAS-Based Threat Monitoring for a Local Airport Monitor (LAM) that Supports Category I Precision Approaches
[ PAPER (in PDF) ]
Presented April 2006 at the IEEE/ION Position Location and Navigation Symposium, San Diego, CA

Do, Ju-Yong, Rabinowitz, M., Enge, P.
Performance of TOA and TDOA in a Non-homogeneous Transmitter Netwrok Combining GPS and Terrestrial Signals
[ PAPER (in PDF) ]
Presented January 2006 at the Institute of Navigation's National Technical Meeting, Monterey CA

Ene, Alexandru, Blanch, J., and Walter, T.
GPS-Galileo RAIM for Vertical Guidance
[ PAPER (in PDF) ]
Presented January 2006 at the Institute of Navigation's National Technical Meeting, Monterey CA

Kim, Euiho, Walter, Todd and J.D. Powell
A Reference Point-Based Precise Relative Positioning Method Using a Single Frequency Receiver
[ PAPER (in PDF) ]
Presented January 2006 at the Institute of Navigation's National Technical Meeting, Monterey CA

Konno, Hiroyuki, Pullen, Sam, Rife, Jason and Enge, Per
Evaluation of Two Types of Dual-Frequency Differential GPS Techniques under Anomalous Ionosphere Conditions
[ PAPER (in PDF) ]
Presented January 2006 at the Institute of Navigation's National Technical Meeting, Monterey CA

Rife, Jason, Phelts, R.E.
Formulation of a Time-Varying Maximum Allowable Error for Ground--Based Augmentation Systems
[ PAPER (in PDF) ]
Presented January 2006 at the Institute of Navigation's National Technical Meeting, Monterey CA

Seo, Jiwon, Rife, J., Pullen, S., Walter, T., P. Enge
Field Data Analysis for a Range-Based Local Airport Monitor for WAAS
[ PAPER (in PDF) ]
Presented January 2006 at the Institute of Navigation's National Technical Meeting, Monterey CA

---

2005 ( Top )

Powell, J. David, C. Jennings, and W. Holforty
Use of ADS-B and Perspective Displays to Enhance Airport Capacity
[ PAPER (in PDF) ]
Presented November 2005 at the 24th Digital Avionics Systems Conference, Washington D.C.

Boyce, L., S. Lo, J. D. Powell, P. Enge
Noise Assessment and Mitigation for Loran for Aviation
[ PAPER (in PDF) ]
Presented October 2005 at the International Loran Association 34th Annual Meeting, 2005, Santa Barbara, CA

Lo, Sherman, Morris, P.,  and  Enge, P.
Early Skywave Detection Network: Preliminary Design and Analysis
[ PAPER (in PDF) ]
Presented October 2005 at the International Loran Association 34th Annual Meeting, 2005, Santa Barbara, CA

Blanch, Juan, Todd Walter, and Per Enge
Protection Level Calculation Using Measurement Residuals: Theory and Results
[ PAPER (in PDF) ]
Presented September 2005 at the Institute of Navigation GNSS Conference, Long Beach, CA

Chiou, Tsung-Yu
GPS Receiver Performance Using Inertial-Aided Carrier Tracking Loop
[ PAPER (in PDF) ]
Presented September 2005 at the Institute of Navigation's GNSS Conference, Long Beach, CA

De Lorenzo, D, J. Gautier, J. Rife, P. Enge, and D. Akos
Adaptive Array Processing for GPS Interference Rejection
[ PAPER (in PDF) ]
Presented September 2005 at the Institute of Navigation's GNSS Conference, Long Beach, CA

Kim, Ung Suok
Analysis of Carrier Phase and Group Delay Biases Introduced by CRPA Hardware
[ PAPER (in PDF) ] (Student Paper Award)
Presented September 2005 at the Institute of Navigation's GNSS Conference, Long Beach, CA

Koenig, Michael, J. Rife, S. Pullen, and P. Enge
Optimizing Channel Selection for the JPALS' Land-based Integrity Monitor
[ PAPER (in PDF) ]
Presented September 2005 at the Institute of Navigation's GNSS Conference, Long Beach, CA

Luo, Ming, S. Pullen, S. Datta-Barua, G. Zhang, T. Walter, and P. Enge
LAAS Study of Slow-Moving Ionosphere Anomalies and Their Potential Impacts
[ PAPER (in PDF) ] [ PRESENTATION (in PowerPoint) ]
Presented September 2005 at the Institute of Navigation's GNSS Meeting, Long Beach, CA

Blanch, Juan, Todd Walter, and Per Enge
Protection Level Calculation in the Presence of Heavy Tail Errors Using Measurement Residuals
[ PAPER (in PDF) ]
Presented July 2005 at the European Navigation Conference GNSS 2005, Munich, Germany

Walter, Todd, S. Pullen, J. Rife, J. Seo, and P. Enge
The Advantages of Local Monitoring and VHF Data Broadcast for SBAS
[ PAPER (in PDF) ]
Presented July 2005 at the European Navigation Conference GNSS 2005, Munich, Germany

Boyce, L., S. Lo, J. D. Powell, P. Enge
Noise Assessment and Mitigation for Loran for Aviation
[ PAPER (in PDF) ]
Presented June 2005 at the Institute of Navigation's Annual Meeting, Cambridge, MA

Datta-Barua, S., T. Walter, H. Konno, J. Blanch, P. Enge
Verification of Low Latitude Ionosphere Effects on WAAS during October 2003 Geomagnetic Storm
[ PAPER (in PDF) ]
Presented June 2005 at the Institute of Navigation's Annual Meeting, Cambridge, MA

Do, J., M. Rabinowitz, P. Enge
Linear Time-of-Arrival Estimation in a Multipath Environment by Inverse Correlation Method
[ PAPER (in PDF) ]
Presented June 2005 at the Institute of Navigation's Annual Meeting, Cambridge, MA

Rife, J., S. Pullen
The Impact of Measurement Biases on Availability for CAT III LAAS
[ PAPER (in PDF) ]
Presented June 2005 at the Institute of Navigation's Annual Meeting, Cambridge, MA

Rife, J., S. Pullen, T. Walter, P. Enge
Vertical Protectiion Levels for a Local Airport Monitor for WAAS
[ PAPER (in PDF) ]
Presented June 2005 at the Institute of Navigation's Annual Meeting, Cambridge, MA

Datta-Barua, S., T. Walter, J. Blanch, P. Enge
Can WAAS Availability Be Inferred From Geomagnetic Data? An Analysis
[ PAPER (in PDF) ]
Proceedings of the Ionospheric Effects Symposium 2005, Alexandria, Virginia: 3-5 May 2005.

Konno, Hiroyuki,  Pullen, Sam,  Luo, Ming, and Enge, Per
Analysis of Ionosphere Gradient Using Japan GEONET Data
[ PAPER (in PDF) ]
Presented January 2005 at the Institute of Navigation's National Technical Meeting, San Diego CA

Ene, Alexandru, Qiu, Diu, Luo, Ming, Pullen, Sam, and Enge, Per
A Comprehensive Ionosphere Storm Data Analysis Method to Support LAAS Threat Model Development
[ PAPER (in PDF) ]
Presented January 2005 at the Institute of Navigation's National Technical Meeting, San Diego CA

Blanch, Juan, Walter, Todd, and Enge, Per
Error Bound Optimization using Second Order Cone Programming
[ PAPER (in PDF) ]
Presented January 2005 at the Institute of Navigation's National Technical Meeting, San Diego CA

---

2004 ( Top )

Walter, Todd, Blanch, Juan, and Rife, Jason
Treatment of Biased Error Distributions in SBAS
[ PAPER (in PDF) ]
Presented December 2004 at the International Symposium on GNSS/GPS in Sydney, Australia

Rife, Jason, Todd Walter, and Juan Blanch
Overbounding SBAS and GBAS Error Distributions with Excess-Mass Functions
[ PAPER (in PDF) ]
Presented December 2004 at the International Symposium on GNSS/GPS in Sydney, Australia

Phelts, R. E., and Akos, D. M.
Nominal Signal Deformations: Limits on GPS Range Accuracy
[ PAPER (in PDF) ]
Presented December 2004 at the International Symposium on GNSS/GPS in Sydney, Australia

Pullen, Sam and Enge, Per
A Civil User Perspective on Near-Term and Long-Term GPS Modernization
[ PAPER (in PDF) ]
Proceedings of Japan GPS/GNSS Symposium 2004,  Tokyo, Japan, November 17-19, 2004.

Walter, Todd, Rajagopal, Sriram, Datta-Barua, Seebany, and Blanch, Juan
Protecting Against Unsampled Ionospheric Threats
[ PAPER (in PDF) ]
Presented October 2004 at the Beacon Satellite Symposium, Trieste, Italy

Blanch, Juan, Walter, Todd, and Enge, Per
Ionospheric Estimation using Extended Kriging for a low latitude SBAS
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation GNSS Conference, Long Beach, CA

De Lorenzo, David S.; Gautier, Jennifer; Enge, Per; Akos, Dennis
GPS Receiver Architecture Effects on Controlled Reception Pattern Antennas for JPALS
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation's GNSS Conference, Long Beach, CA

Datta-Barua, S.,
Ionospheric Threats to Space-Based Augmentation System Development
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation's GNSS Meeting, Long Beach CA

Chiou, Tsung-Yu,  Alban, Santiago,  Atwater, Sarah,  Gautier, Jennifer, Pullen, Sam,  Enge, Per, Akos, Dennis, Gebre-Egziabher, Demoz, Pervan, Boris S.
Performance Analysis and Experimental Validation of a Doppler-Aided GPS/INS Receiver for JPALS Applications
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation's GNSS Meeting, Long Beach, CA

Kim, U. S., De Lorenzo, D. S., Gautier, J., Enge, P., and Orr, J. A.
Phase Effects Analysis of Patch Antenna CRPAs for JPALS
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation GNSS Conference in Long Beach, CA

Lee, Jiyun
LAAS Position Domain Monitor Analysis and Test Results for CAT II/III Operations
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation GNSS Conference, Long Beach, CA

Luo, Ming, Pullen, Sam, Ene, Alexander, Qiu, Diu, Walter, Todd, and Enge, Per
Ionosphere Threat to LAAS: Updated Model, User Impact, and Mitigations
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation GNSS Conference, Long Beach, CA

Rife, Jason, Sam Pullen, and Boris Pervan
Core Overbounding and its Implications for LAAS Integrity
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation GNSS Conference in Long Beach, CA

Walter, Todd, Enge, Per, and Reddan, Pat
Modernizing WAAS
[ PAPER (in PDF) ]
Presented September 2004 at the Institute of Navigation's GNSS Meeting, Long Beach CA

Lo, Sherman, et. al.
Loran Integrity Analysis for Required Navigation Performance 0.3
[ PAPER (in PDF) ]
Presented June 2004 at the 5th International Symposium on Integration of LORAN-C/Eurofix and EGNOS/Galileo, Munich, Germany
 
Lo, Sherman, et. al.
Overview of the Safety Analysis of Loran for Aviation
[ PAPER (in PDF) ]
Presented June 2004 at the Institute of Navigation Annual Meeting, Dayton, OH
 
Carroll, Kevin M., Hawes, A., Peterson, B., Dykstra, K., Swaszek, P. and Lo, S.
Differential Loran-C
[ PAPER (in PDF) ]
Presented May 2004 at the European Navigation Conference - GNSS 2004, Rotterdam, The Netherlands

Lo, Sherman, et. al.
Loran Availability and Continuity Analysis for Required Navigation Performance 0.3
[ PAPER (in PDF) ]
Presented May 2004 at the European Navigation Conference - GNSS 2004, Rotterdam, The Netherlands

Walter, Todd, Datta-Barua, Seebany, Blanch, Juan, and Enge, Per
The Effects of Large  Ionospheric Gradients on Single Frequency Airborne Smoothing  Filters for WAAS and LAAS
[ PAPER (in PDF) ]
Presented January 2004 at the Institute of Navigation's National Technical Meeting, San Diego CA

Do, Juyong, Dennis Akos, and Per Enge
L and S Band Spectrum Survey in the San Francisco Bay Area
[ PAPER (in PDF) ]
Presented April 2004 at the IEEE Position Location and Navigation Symposium, Monterey, CA

Kim, Ung Suok, David S. De Lorenzo, Jennifer Gautier, Per Enge, Dennis Akos, John Orr
Precise Phase Calibration of a Controlled Reception Pattern GPS Antenna for JPALS
[ PAPER (in PDF) ]
Presented April 2004 at the IEEE Position Location and Navigation Symposium, Monterey, CA

Mitelman, Alexander M. , R. Eric Phelts, Dennis M. Akos, Samuel P. Pullen, Per K. Enge
Signal Deformations On Nominally Healthy GPS Satellites
[ PAPER (in PDF) ]
Presented January 2004 at the Institute of Navigation's National Technical Meeting, San Diego CA

Rife, Jason , Sam Pullen, Boris Pervan and Per Enge
Paired Overbounding and Application to GPS Augmentation
[ PAPER (in PDF) ]
Presented April 2004 at the IEEE Position Location and Navigation Symposium, Monterey, CA

De Lorenzo, David S.; Alban, Santiago; Gautier, Jennifer; Enge, Per; Akos, Dennis
GPS Attitude Determination for a JPALS Testbed: Integer Initialization and Testing
[ PAPER (in PDF) ]
Presented April 2004 at the IEEE Position Location and Navigation Symposium, Monterey, CA

Xie, Gang
Optimal On-Airport Monitoring of the Integrity of GPS-Based Landing Systems
[ THESIS (in PDF) ]
Ph.D. Dissertation, Stanford University, March 2004

Blanch, Juan, et. al.
A New Ionospheric Estimation Algorithm for SBAS Combining Kriging and Tomography
[ PAPER (in PDF) ]
Presented January 2004 at the Institute of Navigation's National Technical Meeting, San Diego CA

Luo, Ming, Pullen, S., Walter, T., and Enge, P.
Ionosphere Spatial Gradient Threat for LAAS: Mitigation and Tolerable Threat Space
[ PAPER (in PDF) ]
Presented January 2004 at the Institute of Navigation's National Technical Meeting, San Diego CA

Rajagopal, Sriram, et. al.
Correlation Structure of the Equatorial Ionosphere
[ PAPER (in PDF) ]
Presented January 2004 at the Institute of Navigation's National Technical Meeting, San Diego CA

Phelts, R. Eric, Walter, Todd, Enge, Per
Range Biases on the WAAS Geostationary Satellites
[ PAPER (in PDF) ]
Presented January 2004 at the Institute of Navigation's National Technical Meeting, San Diego CA

Walter, Todd, et. al.
The Effects of Large Ionospheric Gradients on Single Frequency Airborne Smoothing Filters for WAAS and LAAS
[ PAPER (in PDF) ]
Presented January 2004 at the Institute of Navigation's National Technical Meeting, San Diego CA

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2003 ( Top )

Blanch, Juan
Using Kriging to bound Satellite Ranging Errors due to the Ionosphere
[ THESIS (in PDF) ]
Ph.D. Dissertation, Stanford University, December 2003

Boyce, Lee, et. al.
A Time Domain Atmospheric Noise Level Analysis
[ PAPER (in PDF) ]
Presented November 2003 at the International Loran Association 32nd Annual Meeting, 2003, Boulder, CO

Lo, Sherman, et. al.
Analysis of the Effects of ASF Variations for Loran RNP 0.3
[ PAPER (in PDF) ]
Presented November 2003 at the International Loran Association 32nd Annual Meeting, 2003, Boulder, CO

Phelts, R. Eric, et. al.
Practical Signal Quality Monitoring for Augmentation Systems
[ PAPER (in PDF) ]
Presented November 2003 at the International Symposium on GNSS, Tokyo, Japan

Akos, Dennis, et. al.
A Prototyping Platform for Multi-Frequency GNSS Receivers
[ PAPER (in PDF) ]
Presented September 2003 at the Institute of Navigation's GPS/GNSS Meeting, Portland, OR

Datta-Barua, S., P. Doherty, S. Delay, T. Dehel, J. Klobuchar
Ionospheric Scintillation Effects on Single and Dual Frequency GPS Positioning
[ PAPER (in PDF) ]
Presented September 2003 at the Institute of Navigation's GPS/GNSS Meeting, Portland, OR

Lo, Sherman, et. al.
Loran for RNP 0.3 Approach: The Preliminary Conclusions of Loran Integrity Performance Panel (LORIPP)
[ PAPER (in PDF) ]
Presented September 2003 at the Institute of Navigation's GPS/GNSS Meeting, Portland, OR

Luo, Ming, et. al.
LAAS Ionosphere Spatial Gradient Threat Model and Impact of LGF and Airborne Monitoring
[ PAPER (in PDF) ]
Presented September 2003 at the Institute of Navigation's GPS/GNSS Meeting, Portland, OR

Phelts, R. Eric, Walter, Todd, Enge, Per
Toward Real-Time SQM for WAAS: Improved Detection Techniques
[ PAPER (in PDF) ]
Presented September 2003 at the Institute of Navigation's GPS/GNSS Meeting, Portland, OR

Enge, Per
GPS Modernization: Capabilities of the New Civil Signals
[ PAPER (in PDF) ]
Presented 29 July – 1 August 2003 at the Australian International Aerospace Congress, Brisbane, Australia

Gautier, Jennifer
GPS/INS Generalized Evaluation Tool (GIGET) for the Design and Testing of Integrated Navigation Systems
[ THESIS (in PDF) ]
Ph.D. Dissertation, Stanford University, June 2003

Jan, Shau-Shiun
Aircraft Landing Using a Modernized Global Positioning System and the Wide Area Augmentation System
[ THESIS (in PDF) ]
Ph.D. Dissertation, Stanford University, May 2003

Opshaug, Guttorm
A Leapfrog Navigation System
[ THESIS (in PDF) ]
Ph.D. Dissertation, Stanford University, May 2003

Lo, Sherman, et. al.
Loran for Required Navigation Performance 0.3: The Current Work of the Loran Integrity Performance Panel (LORIPP)
[ PAPER (in PDF) ]
Presented April 2003 at the European Navigation Conference - Global Navigation Satellite Systems (ENC GNSS), Graz, Austria

Jan, Shau-Shiun, Walter, T., and Enge, P.
Techniques for Graceful Reversion from Dual to Single Frequency WAAS
[ PAPER (in PDF) ]
Presented January 2003 at the Institute of Navigation's National Technical Meeting, Anaheim, CA

Alban, Santiago, Akos, D., Rock, S. and Gebre-Egziabher, D.
Performance Analysis and Architectures for INS-Aided GPS Tracking Loops
[ PAPER (in PDF) ]
Presented January 2003 at the Institute of Navigation's National Technical Meeting, Anaheim, CA

Blanch, Juan, Walter, T., and Enge, P.
Adapting Kriging to the WAAS MOPS Ionospheric Grid
[ PAPER (in PDF) ]
Presented January 2003 at the Institute of Navigation's National Technical Meeting, Anaheim, CA

Blanch, Juan, Walter, T., and Enge, P.
Measurement Noise versus Process Noise in Ionosphere Estimation for WAAS
[ PAPER (in PDF) ]
Presented January 2003 at the Institute of Navigation's National Technical Meeting, Anaheim, CA

Lo, Sherman, et. al.
Loran Fault Trees for Required Navigation Performance 0.3
[ PAPER (in PDF) ]
Presented January 2003 at the Institute of Navigation's National Technical Meeting, Anaheim, CA.

Luo, Ming, Xie, G., Akos, D., Pullen, S., and Enge, P.
Radio Frequency InterferenceValidation Testing for LAAS using the Stanford Integrity Monitor Testbed
[ PAPER (in PDF) ]
Presented January 2003 at the Institute of Navigation's National Technical Meeting, Anaheim, CA

Walter, Todd, Enge, P., and DeCleene, B.
Integrity Lessons from the WAAS Integrity Performance Panel (WIPP)
[ PAPER (in PDF) ]
Presented January 2003 at the Institute of Navigation's National Technical Meeting, Anaheim, CA

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2002 ( Top )

Mitelman, A., D. Akos, S. Pullen, and P. Enge,
Estimation of ICAO Threat Model Parameters For Operational GPS Satellites.
[ PAPER (in PDF) ]
Preseented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR.

Pullen, Sam, Walter, T., and Enge, P.
System Overview, Recent Developments, and Future Outlook for WAAS and LAAS
[ PAPER (in PDF) ]
Presented November 11 - 13, 2002, Tokyo University of Mercantile Marine GPS Symposium, Tokyo, Japan

Lo, Sherman, et. al.
The Loran Integrity Performance Panel (LORIPP)
[ PAPER (in PDF) ]
Presented October 2002 at the International Loran Association 31st Annual Meeting, 2002, Washington, DC

Alban, Santiago
An Inexpensive and Robust GPS/INS Attitude System for Automobiles
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Blanch, Juan
An Ionospheric Estimation Algorithm for WAAS based on Kriging
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Jan, S.-S.
Analysis of a Three-Frequency GPS/WAAS Receiver to Land an Airplane
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Koenig, Michael, Gebre-Egziabher, D., Pullen, S., Kim, U. S., Enge, P., Pervan, B. S., Chan, F. C., and Colby, G.
Sensitivity Analysis of the JPALS Shipboard Relative GPS Measurement Quality Monitor
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Lo, Sherman, et. al.
The Loran Integrity Performance Panel (LORIPP)
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Normark, Per-Ludvig, Akos, D., Xie, G., Pullen, S., Luo, M., Enge, P.
The Integrity Monitor Testbed and Multipath Limiting Antenna Test Results
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Schloss, P., Phelts, R. Eric, Walter, Todd, Enge, Per
A Simple Method of Signal Quality Monitoring for WAAS LNAV/VNAV
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Opshaug, Guttorm
Leapfrog Navigation System
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Pullen, S. Luo, M., Xie, G., Lee, J., Phelts, R. E., Akos, D.,and Enge, P.
LAAS Ground Facility Design Improvements to Meet Proposed Requirements for Category II/III Operations
[ PAPER (in PDF) ]
Presented September 2002 at the Institute of Navigation's GPS Meeting, Portland, OR

Jennings, C., Charafeddine, M., Powell, J .D., Taamallah, S.
Flight Demonstration of 3D Perspective Synthetic Vision and ADS-B for Closely Spaced Parallel Approaches
[ PAPER (in PDF) ]
Presented Proceedings of the 21st Digital Avionics Systems Conference, Irvine, CA. 2002.

Jennings, C., Powell, J .D.
Flight Test Measurement of Pilot Reaction Times to Runway Incursions: Out-the-Window vs. Synthetic Vision
[ PAPER (in PDF) ]
Presented Proceedings of the 21st Digital Avionics Systems Conference, Irvine, CA. 2002.

Lo, Sherman
Broadcasting GPS Integrity Information Using Loran-C
[ THESIS (in PDF) ]
Ph.D. Dissertation, July 2002

Bauregger, F., Walter, T., Akos, D. and Enge, P.
A Novel Dual-Patch Anti-Jam GPS Antenna
[ PAPER (in PDF) ]
Presented June 2002 at the Institute of Navigation's Annual Meeting, Albuquerque, NM

Luo, M., Pullen, S., Akos, D., Xie, G., Datta-Barua, S., Walter, T., and Enge, P.
Assessment of Ionospheric Impact on LAAS Using WAAS Supertruth Data
[ PAPER (in PDF) ]
Presented June 2002 at the Institute of Navigation's Annual Meeting, Albuquerque, NM

Peterson, Benjamin, Enge, Per, Walter, Todd,  Lo, Sherman, Boyce, C. O. Lee, Wenzel, Robert and Narins, Mitchell
Hazardously Misleading Information Analysis for Loran LNAV
[ PAPER (in PDF) ]
Presented June 2002 at the 3^rd International Symposium on Integration of LORAN-C/Eurofix and EGNOS/Galileo, Munich, Germany

Opshaug, G. and Enge, P.
Integrated GPS and UWB Navigation System
[ PAPER (in PDF) ]
Presented May 2002 at the IEEE UWB Science and Technology (UWBST) Conference, Baltimore, MD

Lo, Sherman, et. al.
WAAS Performance in the 2001 Alaska Flight Trials of the High Speed Loran Data Channel
[ PAPER (in PDF) ]
Presented April 2002 at the IEEE Position Location and Navigation Symposium, Palm Springs, CA

Hansen, Andrew
Tomogrpahic Estimation of the Ionosphere Using Terrestrial GPS Sensors
[ THESIS (in PDF) ]
Ph.D. Dissertation, March 2002

Blanch, J., Walter, T., Enge, P.
Application of Spatial Statistics to Ionosphere Estimation for WAAS
[ PAPER (in PDF) ]
Presented January 2002 at the Institute of Navigation's National Technical Meeting, San Diego, CA

Datta-Barua, S., T. Walter, S. Pullen, M. Luo, J. Blanch, and P. Enge
Using WAAS Ionospheric Data to Estimate LAAS Short Baseline Gradients
[ PAPER (in PDF) ]
Presented January 2002 at the Institute of Navigation's National Technical Meeting, San Diego, CA

Jan, S.-S., Gebre-Egziabher, D., Walter, T., Enge, P.
Worst-Case Analysis of a 3-Frequency Receiver to Land a General Aviation Airplane
[ PAPER (in PDF) ]
Presented January 2002 at the Institute of Navigation's National Technical Meeting, San Diego, CA

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2001 ( Top )

Elkaim, Gabriel
Sytem Identification for Precision Control of a Wingsail GPS-Guided Catamaran
[ THESIS (in PDF) ]
Ph.D. Dissertation, Stanford University, December 2001

Holforty, Wendy and Powell, J. David
Flight Deck Displays of Airborne Traffic Wake Vortex
[ PAPER (in PDF) ]
Presented 14-18 October 2001 20th DASC Conference Daytona Beach, FL

Enge, P., Fan, Tiwari, Chou, Mann, Sahai, Stone, Van Roy
Improving GPS Coverage and Continuity: Indoors and Downtown
[ PAPER (in PDF) ]
Presented Sep 2001 at the Institute of Navigation's GPS Conference, Salt Lake City, UT

Jan, S., Chan, W., Walter, T., and Enge, P.
Matlab Simulation Toolset for SBAS Availability Analysis
[ PAPER (in PDF) ]
Presented Sep 2001 at the Institute of Navigation's GPS Conference, Salt Lake City, UT

Luo, M., Akos, Koenig, Opshaug, Pullen, Enge, Erlandson, and Frodge
Testing and Research on Interference to GPS from UWB Transmitters
[ PAPER (in PDF) ]
Presented Sep 2001 at the Institute of Navigation's GPS Conference, Salt Lake City, UT

Normark, P., Xie, Akos, Pullen, Luo, Lee, and Enge
The Next Generation Integrity Monitor Testbed (IMT) for Ground System Development and Validation Testing
[ PAPER (in PDF) ]
Presented Sep 2001 at the Institute of Navigation's GPS Conference, Salt Lake City, UT

Opshaug, G. and Enge, P.
GPS and UWB for Indoor Navigation
[ PAPER (in PDF) ]
Presented Sep 2001 at the Institute of Navigation's GPS Conference, Salt Lake City, UT

Phelts, R.E., Mitelman, Pullen, Akos, Enge
Transient Performance Analysis of a Multicorrelator Signal Quality Monitor
[ PAPER (in PDF) ]
Presented Sep 2001 at the Institute of Navigation's GPS Conference, Salt Lake City, UT

Pullen, S., Lee, Luo, Pervan, Chan, and Gratton
Ephemeris Protection Level Equations and Monitor Algorithms for GBAS
[ PAPER (in PDF) ]
Presented Sep 2001 at the Institute of Navigation's GPS Conference, Salt Lake City, UT

Vidarsson, L., Pullen, S., Green, G. and Enge, P.
Satellite Autonomous Integrity Monitoring and Its Role in Enhancing GPS User Performance
[ PAPER (in PDF) ]
Presented Sep 2001 at the Institute of Navigation's GPS Conference, Salt Lake City, UT

Houck, S. and Powell, J.D.
Assessment of the Probability of a Midair Collision During an Ultra Closely Spaced Parallel Approach
[ PAPER (in PDF) ]
Presented Aug 2001 at the AIAA Guidance, Navigation and Control Conference, Montreal, Canada

LeMaster, E. and Rock, S.
A Local Area GPS Pseudolite-Based Mars Navigation System
[ PAPER (in PDF) ]
Presented Aug 2001 at the IEEE 10th International Conference on Advanced Robotics, Budapest, Hungary

Phelts, Robert Eric
Multicorrelator Techniques for Robust Mitigation of Threats to GPS Signal Quality
[ THESIS (in PDF) ]
Ph.D. Dissertation, June 2001

Blanch, J., Walter, T., and Enge, P.
Ionospheric Threat Model Methodology for WAAS
[ PAPER (in PDF) ]
Presented June 2001 at the Institute of Navigation's Annual Meeting, Albuquerque, NM

Lee, J., Pullen, Xie, and Enge
LAAS Sigma-Mean Monitor Analysis and Failure-Test Verification
[ PAPER (in PDF) ]
Presented June 2001 at the Institute of Navigation's Annual Meeting, Albuquerque, NM

Xie, G., Pullen, Luo, Normark, Akos, Lee, Enge, Pervan
Integrity Design and Updated Test Results for the Stanford LAAS Integrity Monitor Testbed
[ PAPER (in PDF) ]
Presented June 2001 at the Institute of Navigation's Annual Meeting, Albuquerque, NM

Elkaim, G. and Parkinson, B.
System Identification for Precision Control of a GPS Autonomous Catamaran
[ PAPER (in PDF) ]
Presented May 2001 at the International Conference on Integrated Navigation Systems, St. Petersburg, Russia

Gebre-Egziabher, D., Powell, J.D., and Enge, P.
Design and Performance Analysis of a Low Cost Aided Dead Reckoning Navigation System
[ PAPER (in PDF) ]
Presented May 2001 at the International Conference on Integrated Navigation Systems, St. Petersburg, Russia

Gebre-Egziabher, D., Elkaim, G., Powell, J.D., and Parkinson, B.
A Non-Linear, Two-Step Estimation Algorithm For Calibrating Solid-State Strapdown Magnetometers
[ PAPER (in PDF) ]
Presented May 2001 at the International Conference on Integrated Navigation Systems, St. Petersburg, Russia

Houck, Sharon
Multi Aircraft Dynamics, Navigation and Operation
[ THESIS (in PDF) ]
Ph.D. Dissertation, April 2001

Lo, Sherman and Enge, Per
Analysis of the Enhanced LORAN Data Channel
[ PAPER (in PDF) ]
Presented Feb 2001 at the German Institute of Navigation conference, Bonn, Germany

Bauregger, F., Walter, T., and Enge, P.
The Dielectric Cavity Antenna - An Alternative to the Choke Ring Antenna
[ PAPER (in PDF) ]
Presented Jan 2001 at the ION National Technical Meeting, Long Beach, CA.

Jan, S.-S. and Enge, P.
Finding Source of Electromagnetic Interference (EMI) to GPS Using a Network of Sensors
[ PAPER (in PDF) ]
Presented Jan 2001 at the ION National Technical Meeting, Long Beach, CA.

Walter, Todd, Hansen, Andrew, and Enge Per
Message Type 28
[ PAPER (in PDF) ]
Presented Jan 2001 at the ION National Technical Meeting, Long Beach, CA.

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2000 ( Top )

Lo, S. and Enge, P.
Data Transmission Using LORAN-C
[ PAPER (in PDF) ]
Presented Nov 2000 at the 29th Annual Convention and Technical Symposium of the International Loran Association, Washington D.C.

Fuller, Richard
Aviation Utilization of Geostationary Satellites for the Augmentation of GPS: Ranging and Data Link
[ THESIS (in PDF) ]
Ph.D. Dissertation, Stanford University, May 2000

Houck, S. and Powell, J.D.
A Parametric Sensitivity Study of Ultra Closely Spaced Parallel Approaches
[ PAPER (in PDF) ]
Presented Oct 2000 at the Digital Avionics Systems Conference, Philadelphia, PA

Jennings, C. and Powell, J.D.
Synthetic Vision Displays for Instrument Landings and Traffic Awareness - Development and Flight Testing
[ PAPER (in PDF) ]
Presented Oct 2000 at the Digital Avionics Systems Conference, Philadelphia, PA

Fuller, R., Walter, T., and Enge, P.
Burst Mode Message Loss Effects on WAAS Availability
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Akos, D., Normark, P-L., Lee, J-T., Gromov, K., Tsui, J., and Schamus, J.
Low Power Global Navigation Satellite System (GNSS) Signal Detection and Processing
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Gromov, K., Akos., D., Pullen, S., Enge, P. and Parkinson, B.
GIDL: Generalized Interference Detection and Localization System
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Hansen, A., Blanch, J., Walter, T., and Enge, P.
Ionospheric Correlation Analysis for WAAS: Quiet and Stormy
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Jung, J., Enge, P., Pervan, B.
Optimization of Cascade Integer Resolution with Three Civil GPS Frequencies
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

LeMaster, E. and Rock, S.
Field Test Results for a Self-Calibrating Pseudolite Array
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Luo, M., Akos, D., Pullen, S., and Enge, P.
Interference to GPS from UWB transmitters
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Mitelman, A., Phelts, R.E., Akos, D., Pullen, S. and Enge, P.
A Real-Time Signal Quality Monitor for GPS Augmentation Systems
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Opshaug, G. and Enge, P.
Robotic Snow Cat
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Phelts, R.E. and Enge, P.
The Multipath Invariance Approach for Code Multipath Mitigation
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Phelts, R.E., Akos, D. and Enge, P.
Robust Signal Quality Monitoring and Detection of Evil Waveforms
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Rabinowitz, M., Parkinson, B., Gromov, K., and Cohen, C.
Architectures for Joint GPS/LEO Satellite Carrier Phase Receivers Designed for Rapid, Robust Resolution of Carrier Cycle Ambiguities on Mobile Platorms
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Rabinowitz, M., Parkinson, and Spilker, J.
Some Capabilities of a Joint GPS-LEO Navigation System
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Walter, T., Hansen, A., Blanch, J. and Enge, P.
Robust Detection of Ionospheric Irregularities
[ PAPER (in PDF) ]
Presented Sep 2000 at the Institute of Navigation's GPS conference, Salt Lake City, UT

Houck, S. and Powell, J.D.
Visual, Cruise Formation Flying Dynamics
[ PAPER (in PDF) ]
Presented August 2000 at the AIAA Atmoshpheric Flight Mechanics conference, Denver, CO

Lo, Sherman and Enge, Per
Broadcasting Data from an SBAS Reference Network over using LORAN
[ PAPER (in PDF) ]
Presented June 2000 at the Institute of Navigation's Annual Meeting, San Diego, CA

Gebre-Egziabher, D. and J. David Powell
A DME-based Area Navigation System for GPS/WAAS Interference Mitigation in General Aviation Applications
[ PAPER (in PDF) ]
Presented Mar 2000 at the IEEE PLANS conference, San Diego, CA

Gebre-Egziabher, D., Elkaim, G., and J. David Powell
A Gyro-Free Quaternion-based Attitude Determination System Suitable for Implementation Using Low Cost Sensors
[ PAPER (in PDF) ]
Presented Mar 2000 at the IEEE PLANS conference, San Diego, CA

Lo, Sherman and Enge, Per
Broadcasting Data from an SBAS Reference Network over Low Rate Broadcast Channels
[ PAPER (in PDF) ]
Presented Mar 2000 at the German Institute of Navigation conference, Bonn, Germany

Phelts, R.E. and Enge, P.
Multipath Mitigation for Narrowband Receivers
[ PAPER (in PDF) ]
Presented Mar 2000 at the IEEE PLANS conference, San Diego, CA

Hansen, A., Peterson, E., Walter, T., and Enge, P.
Correlation Structure of Ionospheric Estimation and Correlation for WAAS
[ PAPER (in PDF) ]
Presented Jan 2000 at the Institute of Navigation's NTM, Anaheim, CA

James Shau-Shiun Jan and Per Enge
Using GPS to Synthesize a Large Antenna Aperture When the Elements are Mobile
[ PAPER (in PDF) ]
Presented Jan 2000 at ION NTM, Anaheim, CA

Phelts, R.E. and Enge, P.
The Case for Narrowband Receivers
[ PAPER (in PDF) ]
Presented Jan 2000 at ION NTM, Anaheim, CA

Andrew K. Barrows and J. David Powell
Flying a Tunnel-in-the-Sky Display Within the Current Airspace System
[ PAPER (in PDF) ]
Presented Jan 2000 at the AIAA 38th Aerospace Sciences Meeting, Reno, NV

 

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1999 ( Top )

Jung, Jaewoo
High Integrity Carrier Phase Navigation for Future LAAS Using Multiple Civilian GPS Signals
[ PAPER (in PDF) ]
Presented Sep 1999 at the Institute of Navigation's GPS conference, Nashville, TN

Gromov, K., Akos., D., Pullen, S., Enge, P., Parkinson, B., and Pervan, B.
Interference Direction finding for Aviation Applications of GPS
[ PAPER (in PDF) ]
Presented Sep 1999 at the Institute of Navigation's GPS conference, Nashville, TN

LeMaster, Ed, and Rock, Stephen
Self-Calibration of Pseudolite Arrays Using Self-Differencing Transceivers
[ PAPER (in PDF) ]
Presented Sep 1999 at the ION GPS conference, Nashville, TN

Houck, S., Barrows, A., Parkinson, B., Enge, P., and Powell, J.D.
Flight Test of WAAS for Use in Closely Spaced Parallel Approaches
[ PAPER (in PDF) ]
Presented Sep 1999 at the ION GPS conference, Nashville, TN

Jennings, C, Alter, K., Barrows, A., Enge, P., and Powell, J.D.
3-D Perspective Flight Displays for Guidance and Traffic Awareness
[ PAPER (in PDF) ]
Presented Sep 1999 at the ION GPS conference, Nashville, TN

Phelts, R.E., Stone, J., Enge, P., and Powell, J.D.
Software-based Multipath Mitigation: Sampling for Multipath Invariance
[ PAPER (in PDF) ]
Presented July 1999 at the 4th International Symposium on Satellite Navigation Technology and Applications, Brisbane, Australia

Barrows, A. and Powell, J.D.
Tunnel-in-the-Sky Cockpit Display for Complex Remote Sensing Flight Trajectories
[ PAPER (in PDF) ]
Presented June 1999 at the Airborne Remote Sensing conference, Ottawa, Canada

Hayward, Roger, Marchick, Adam, and Powell, J. David
Single Baseline GPS Based Attitude Heading Reference System (AHRS) for Aircraft Applications
[ PAPER (in PDF) ]
Presented June 1999 at the IEEE American Control Conference, San Diego, CA

Walter, Todd, Hansen, Andrew, and Enge, Per
Validation of the WAAS MOPS Integrity Equation
[ PAPER (in PDF) ]
Presented June 1999 at ION Annual Meeting, Cambridge, MA

Barrows, A. Alter, K, Jennings, C., and Powell, J.D.
Alaskan Flight Trials of a Synthetic Vision System for Instrument Landings of a Piston Twin Aircraft
[ PAPER (in PDF) ]
Presented Apr 1999 at the SPIE Enhanced and Synthetic Vision conference, Orlando, FL

Jock R. I. Christie, Ping-Ya Ko, Andrew Hansen, Donghai Dai, Samuel Pullen, Boris S. Pervan, Bradford W. Parkinson
The Effects of Local Ionospheric Decorrelation on LAAS: Theory and Experimental Results
[ ABSTRACT ] [ PAPER (in PDF) ]
Presented January 1999 at ION National Technical Meeting, San Diego, CA

Richard A Fuller, Todd Walter, Sharon Houck, Per Enge
Flight Trials of a Geostationary Satellite Based Augmentation
System at High Latitudes and Dual Satellite Coverage
[ ABSTRACT ] [ PAPER (in PDF) ]
Presented January 1999 at ION National Technical Meeting, San Diego, CA

Demoz Gebre-Egziabher, Sherman Lo, J. David Powell, Per Enge
GPS Supplemental Navigation Systems for Use During the Transition to a Sole-Means-GPS National Airspace System
[ ABSTRACT ] [ PAPER (in PDF) ]
Presented January 1999 at ION National Technical Meeting, San Diego, CA

Jie Li, Awele Ndili, Lisa Ward, Saps Buchman
GPS Receiver Satellite/Antenna Selection Algorithm for the Stanford Gravity Probe B Relativity Mission
[ ABSTRACT ] [ PAPER (in PDF) ]
Presented January 1999 at ION National Technical Meeting, San Diego, CA

Mitelman, A., Jung, J., and Enge, P.
LAAS Monitoring For a Most Evil Satellite Failure
[ PAPER (in PDF) ]
Presented January 1999 at ION National Technical Meeting, San Diego, CA

Jonathan M. Stone, Edward A. LeMaster, J. David Powell, Stephen Rock
GPS Pseudolite Transceivers and their Applications
[ ABSTRACT ] [ PAPER (in PDF) ]
Presented January 1999 at ION National Technical Meeting, San Diego, CA

Todd Walter
WAAS MOPS: Practical Examples
[ ABSTRACT ] [ PAPER (in PDF) ]
Presented January 1999 at ION National Technical Meeting, San Diego, CA

Abbott, Eric and David Powell
Land-vehicle Navigation Using GPS
[ ABSTRACT ]
The Proceedings of the IEEE January 1999, vol 87, no 1, pp 145-162

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