BDS/GPS双差组合观测数据周跳探测与修复方法研究

Research on cycle slip detection and repair method of BDS/GPS dual-difference combined data

针对BDS/GPS双差组合数据解算需要考虑观测数据周跳探测与修复能力的问题,该文研究了BDS/GPS双差组合观测数据周跳探测与修复方法。该方法根据基线长短采用不同周跳探测与修复手段,对于20 km以上的长基线采用三差后的双频观测值进行无电离层线性组合和宽相线性组合的双频周跳探测方法,然后分别以三差后的无电离层线性组合残差值和载波双频残差平均值作为周跳探测检验量;对于20 km以下的短基线采用单频周跳探测方法,利用三差后的载波L1或L2的残差值作为周跳检验量,利用该方法进行周跳探测与修复实验。结果表明,BDS/GPS双差组合观测数据周跳探测与修复方法可以有效探测并修复GPS卫星和北斗的GEO、MEO、IGSO卫星观测值中存在的周跳。

Aiming at the problem of cycle slip detection and repair ability of observation data existing in solving BDS/GPS double-difference combination data,this paper researched a cycle slip detection and repair method for BDS/GPS Dual-difference combined data,which adopted different cycle slip detection and repaired methods according to baseline length.For long baselines over 20 km,the double frequency cycle slip detection method with ionosphere-free linear combination and wide phase linear combination was carried out by using the double frequency observation value after three differences,the cycle slip detection test was based on the three-difference ionosphere-free linear combination residuals and the average carrier dual-frequency residuals.For short baselines below 20 km,the single frequency cycle slip detection method was used,and the residual value of carrier L1 or L2 after three-difference was used as the cycle slip test quantity.By using this method,cycle slip detection and repair experiments were carried out.The results showed that the cycle slip detection and repair method based on BDS/GPS double difference combination data can effectively detect and repair the cycle slip existing in the observed values of GPS satellites and Beidou GEO,MEO and IGSO satellites.