Estimation of Compass Satellite Differential Code Biases Using Combined GPS/Compass Observation

摘要

The differential code basis can affect the estimation of the total electric content (TEC) with the global GNSS satellites observations. As it's the same with GPS satellites it's very important to estimate the differential code basis of Compass satellites. But with few Compass satellites in orbit at the present time and the characteristics of Geostationary Earth Orbit (GEO) Satellites, it's difficult to separate the ionosphere parameters from the differential code basis. A method to estimate the DCB of Compass satellites is put forward in this article with the mathematical models. An experiment has been carried out with the observed data to estimate the DCBs of all the satellites. Conclusions are given through data processing and analysis.