Wide area differential GPS reference system and method

Details Wide area differential GPS reference system and method Wide area differential GPS reference system and method

1996-07-22

1997-04-15

Teska, Kevin J.

Boots, shoes, and leggings

364443, 364458, 364463, 364459, 364439, 342356, 342357, 342358, G01S 502

Patent

active

056216467

ABSTRACT:
A GPS reference system and corresponding method utilizing a network of reference stations and a master station. Each reference station receives GPS signals from GPS satellites it observes and computes in response a pseudo-range residual for each GPS satellite it observes. The master station is in communication with the reference stations to receive the computed pseudo-range residuals and comprises a pseudo-range residual synchronizer, an ephemeris and clock correction estimator for each GPS satellite observed by the reference stations, and a transmitter. The pseudo-range residual synchronizer is responsive to the received pseudo-range residuals in order to compute clock differences between the reference stations and remove the clock differences from the received pseudo-range residuals so as to synchronize them. Each ephemeris and clock correction estimator computes an ephemeris correction and a clock correction for the corresponding GPS satellite in response to each synchronized pseudo-range residual for the corresponding GPS satellite. The transmitter transmits to users the computed ephemeris and clock corrections for each GPS satellite observed by the reference stations.

REFERENCES:
patent: 4646096 (1987-02-01), Brown
patent: 4797677 (1989-01-01), MacDoran et al.
patent: 4912475 (1990-03-01), Counselman, III
patent: 5093800 (1992-03-01), Ifune
patent: 5155490 (1992-10-01), Spradley, Jr. et al.
patent: 5202829 (1993-04-01), Geier
patent: 5225842 (1993-07-01), Brown et al.
patent: 5323322 (1994-06-01), Mueller et al.
patent: 5379224 (1995-01-01), Brown et al.
patent: 5390124 (1995-02-01), Kyrtsor
D. Lapucha, M. Huff, "Multi-Site Real-Time DGPS System Using Starfix Link; Operational Results", ION-GSP-92, pp. 581-588.
M. Lage, B. Elrod, "The FAA's WIB/WDGPS Testbed and Recent Results", ION-GPS-93, pp. 487-493.
F. Haas, M. Lage, S. Kalinowski, "GPS Wide Area Augmentation System (WAAS) Testbed Results -Phase 1D Testbed Results", ION Annual Meeting, pp. 239-248.
C. Kee, B. Parkinson, "Algorithms and Implementation of Wide Area Differential GPS", ION-GPS-92, pp. 1-8.
C. Kee, "Wide Area Differential GPS(WADGPS)", Changdon Kee, Dec. 1993, pp. i-128.
C. Goad, "Surveying with GPS", The Global Positioning System, pp. 1-17.
H. Janes, R. Langley, "Analysis of Tropospheric Delay Prediction Models: Comparisons with Ray-Tracing and Implications for GPS Relative Positioning, Bulletin Geodesiue", vol. 65, pp. 151-161, 1991.
T. Walter, C. Kee, Y. C. Chao, Y. J. Tsai, U. Peled, J. Ceva, A. K. Barrows, E. Abbott, D. Powell, P. Enge, and B. Parkinson, "Flight Trials of the Wide Area Augmentation System (WAAS)", ION-GPS-94, pp. 1-9.

Affiliated with

Also associated with

Rating

Wide area differential GPS reference system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wide area differential GPS reference system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide area differential GPS reference system and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-366174