Doppler Test Results of Experimental GPS Receiver.
NAVAL SURFACE WEAPONS CENTER DAHLGREN VA
Pagination or Media Count:
Three experimental geodetic Global Positioning System Receivers were deployed in the Washington, D. C. area. Analysis of five to six hours of Doppler observations distributed among four satellites yielded relative position coordinates on a 28 km baseline which were repeatable to 30 cm in height, 70 cm in the East directions and to 10 cm in the North directions. Results obtained for a receiver equipped with an oscillator having poorer stability degraded to 50 cm to 1.5 meters. The results confirm simulations that Doppler observations made with the geodetic receiver under development will yield decimeter accuracy in relative position in one to three hours. Since the experimental receivers required about a minute to sequence between satellites, tests could not be performed to test cm precision in relative station positioning which can be obtained by comparing phase observations between satellites with receivers under development.
- Radiofrequency Wave Propagation