The Doppler difference method as applied to track the GEOS 3 spacecraft is discussed. In this method a pair of 2 GHz ground tracking stations simultaneously track a spacecraft beacon to generate an observable signal in which bias and instability of the carrier frequency cancel. The baselines are formed by the tracking sites at Bermuda, Rosman, and Merritt Island. Measurements were made to evaluate the effectiveness of the Doppler differencing procedure in tracking a beacon target with the high dynamic rate of the GEOS 3 orbit. Results indicate the precision of the differenced data to be at a level comparable to the conventional precise two way Doppler tracking.
GEOS-3 Doppler Difference Tracking
1977
43 pages
Report
No indication
English
GEOS-3 Doppler difference tracking
NTRS | 1977
|NASA GEOS Composition Forecast System: “GEOS-CF”
NTIS | 2022
|