不同故障模式下的GNSS ARAIM性能评估

Performance Evaluation of GNSS ARAIM under Different Failure Modes

分析只考虑卫星故障以及同时考虑卫星故障和星座故障时,GNSS双星座、三星座以及四星座组合的ARAIM性能,通过实测数据分析地面测站在LPV-200下的ARAIM性能,并进一步仿真GNSS ARAIM在世界范围内LPV-200下的可用性。实测和仿真结果表明,ARAIM可用性由赤道向两极递减,呈对称分布;BDS作为异构星座,能够显著增加亚太地区的ARAIM可用性。相较于双星故障,单星和单星座故障同时发生时,GPS+BDS的ARAIM可用性下降幅度较大;GPS+GLONASS+BDS和GPS+GLONASS+BDS+Galileo的ARAIM可用性下降幅度较小。

This paper analyzes the ARAIM performance of GNSS dual constellations,three constellations and four constellations combination when only considering satellite failure and considering satellite failure and constellation failure at the same time.It analyzes the ARAIM performance of ground stations under LPV-200 through measured data,and further simulates the availability of GNSS ARAIM under LPV-200 in the world.The results of measurement and simulation show that the availability of ARAIM decreases from the equator to the poles in a symmetrical distribution.As a heterogeneous constellation,BDS can significantly increase the availability of ARAIM in the Asia Pacific region.Compared with the dual satellites failure,the availability of GPS+BDS ARAIM decreases greatly when the single satellite and single constellation failures occur simultaneously.The availability of ARAIM of GPS+GLONASS+BDS and GPS+GLONASS+BDS+Galileo decreases slightly.