Performance Evaluation of LEO Multi-constellation Enhanced BDS Precision Point Positioning
The performance of precision point position(PPP)of Beidou Navigation Satellite System(BDS)en-hanced with different configurations of low orbit constellation(LEO)is studied in this paper.Based on measured data,precision orbit and clock error products of IGS 6 stations at high,medium and low latitudes,the experimen-tal simulation data of BDS,"Hongyan(HY)"and"Centrispace(CS)"precision ephemeris,satellite clock error and observations are generated,and the LEO enhancing BDS PPP mathematical model is constructed to realize dif-ferent combination PPP of BDS,BDS+HY,BDS+CS and BDS+HY+CS.The results show that the positioning ac-curacies of 10 minutes and 60 minutes static PPP,the average number of visible satellites and PDOP value are im-proved to a certian extent for enhancing BDS.The high latitude KIRU station is enhanced significantly by HY,and the convergence time is reduced within 2 minutes.The convergence time of low latitude FAA1 station is increased to the maximum by CS,which is shortened from 46 minutes 50 seconds to 2 minutes.The best improvement effect on BDS is HY+CS,the accuracy in 10 minutes is reached millimeter level,and all stations except FAA1 station are converged within 1 minute.
LEO satellite navigation enhancementBeidou navigation satellite systemprecise point positioningpositioning accuracyconvergence time
万方数据
维普
