Compass Satellite Orbit Determination Based on Inter-satellite and Satellite-to-station Ranging

摘要

For those satellite navigation systems, whose groundstations distributed only in local area, such as Compass,satellite observation arcs are limited. Satellite orbitdetermination based on these satellite-to-station ranges islack of precision. Inter-satellite ranging based on Intersatellitelink is able to extend satellite observation arcsand enhance satellite orbit determination accuracy.Aiming at the inter-satellite link of narrow-beam antenna,a new TDMA frame structure is proposed. Orbitdetermination performance based on joint ranges of intersatelliteand satellite-to-station under the new TDMAframe structure is analyzed. The factors impacting orbitdetermination performance such as ranging error, ranginginterval and ranging link number are all analyzed.Simulation results show that after adding inter-satellitelink, the maximum improvement of orbit determinationaccuracy is 77.5%. Among the factors, ranging interval isthe predominate one.