摘要
针对北斗导航卫星的钟差大、信号噪声大等特点,提出一种周跳探测与修复方法。首先根据单频码相组合,分别确定两个频率上周跳的搜索范围,然后加入载波相位变化率,基于双频载波相位进行最小二乘多项式拟合,拟合结果综合运用Blewitt方法检验标定周跳并剔除野值。根据周跳的整数特性,利用残差最小修复周跳。利用COMPASS-MEO卫星实测数据进行试验,验证了该算法可以有效地检测出所有周跳并快速修复。
To counter the characteristics of Beidou navigation satellites＇ large clock error and signaltonoise, a suitable combined method for cycle slips detection and correction is proposed. Firstly, the limits of two frequency cycle slip can be determined by the combination of singlefrequency and code, then the least squares polynomial fitting would be performed based on dualfrequency data considering the change rate of carrier phase. The cycle slips would be demarcated and outliers would be rejected by the Blewitt method to test fitting results. The cycle slips, being an integer, can be restored by means of minimize the residuals. The test on COMPASSMEO satellites＇ data verifies that the proposed algorithm can detect all cycle slips and fix it quickly in static and lowdynamic measurements.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第5期140-144,共5页
Journal of Geodesy and Geodynamics
基金
江苏高校优势学科建设工程资助项目(PAPD SA1102)
关键词
北斗导航卫星
周跳探测
单频码相组合法
电离层残差法
Blewitt检验
Beidou navigation satellites
cycle slip detection
combination of single-frequency and code
ionizedlayer remnant method of difference
Blewitt test
