AAS 97-701
DEMONSTRATION OF MICROGPS FOR LOW-COST ORBIT DETERMINATION
Sien-Chong Wu, D. Kuang, S.M. Lichten, S. Nandi, L.J. Romans, J.M. Srinivasan - Jet Propulsion Laboratory
Abstract
The capability of low-cost orbit determination with microGPS space receiver for a low-earth satellite, SNOE, is demonstrated using the actual GPS data from GPS/MET satellite. The measurements acquired by the microGPS receiver will be snapshots of carrier doppler and ambiguous pseudorange. Among the challenges in orbit determination are the resolution of the pseudorange ambiguity, the estimation of the measurement timetag drift which affects the orbit solution, and the poor a priori knowledge of the orbit. The effects of data gaps and doppler data quality are investigated. An efficient data acquiring scenario for SNOE is derived.