Research on the Calculation Method of the Signal in Space User Range Error for Beidou Navigation Satellite System

摘要

According to the definition of signal in space (SIS) user range error (URE) and the Root Mean Square URE(rms URE) calculation method given in the Global Positioning System Standard Positioning Service Performance Standard (GPS-SPS-PS), the Beidou Navigation Satellite System (BDS) Instantaneous URE (IURE) and rms URE formulas are deduced in detail considering the elevation constrains. On the one hand, BDS URE is calculated by the orbital error and clock error calculated from the ephemeris data, and BDS URE is calculated by the measured receiver data on the other hand. The correctness of the formula is verified by comparing the results of the two methods.