Satellite Orbit Interpolation Algorithm Analysis for GNSS Terminals

摘要

Using real-time broadcast ephemeris to calculate satellite orbit information and clock parameters is an important calculation work in GNSS terminal positioning solution. Considering the development trend of GNSS terminal's low power consumption and Soc, the application and implementation of satellite orbit interpolation algorithm in GNSS receiver are analyzed. From the aspects of computing efficiency, application strategy and continuity, the performance of interpolation algorithm in GNSS real-time operation is analyzed. An implementation of GNSS satellite orbit interpolation algorithm is given to meet the needs of GNSS high frequency sub-location applications. The calculation results show that the method can fit the position and velocity parameter information of GNSS satellites orbit operation in real time. The satellite position accuracy is better than 1e-4 m and the velocity accuracy is better than le-3 m/s. It basically meets the requirements of high-frequency real-time calculation of GNSS receivers, and continuity.