摘要
卫星频间钟差偏差变化特性的分析对其模型化、卫星钟稳定性的评估具有重要意义。采用北斗(BeiDou)2012年1月的三频数据,解算了GEO卫星的IFCB并分析其时序特性。为了削弱粗差对解算结果的影响,采用了抗差估计算法。针对GEO卫星IFCB的特性,提出了GEO卫星IFCB的经验模型。结果表明,二次曲线函数能较好地描述GEO卫星的IFCB,并达到71%以上的改正效果。
It is very meaningful for modeling the inter‐frequency clock bias （IFCB） and assessing the stability of the satellite clock to analyze the characterization of the IFCB .The triple‐frequency data from BeiDou covering Jan .1‐31 ,2012 is processed to compute the IFCB of the GEO satellite .To reduce the influence of the gross error on the computed results ,the robust estimation is used in data processing .Based on the estimated results ,the IFCB series of the GEO satellite is analyzed .According to the features of the IFCB of the GEO satellites ,an empirical model is presented .The performances of the model indicate that the quadratic function can describe the IFCB of the BeiDou GEO satellite well ,by which more than 71%inter‐frequency clock bi as can be corrected .
出处
《测绘学报》
EI
CSCD
北大核心
2014年第11期1127-1131,共5页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金(41204034)
关键词
三频信号
精密单点定位
频间钟差偏差
北斗系统
triple-frequency signals
precise point positioning
inter-frequency clock bias
BeiDou
