时标偏差对站间双向时间比对的影响分析  

Influence Analysis of Different Timescale Deviation on TWSTT

作　　者：朱陵凤[1] 唐波[1] 李超[1] 刘利[1] 赵阳 

机构地区：[1]北京环球信息应用开发中心 [2]解放军73603部队

出　　处：《宇航计测技术》2008年第5期34-37,56,共5页Journal of Astronautic Metrology and Measurement

摘　　要：基于站间双向时间比对的基本原理,讨论了时标偏差对站间双向时间比对精度的影响,并利用实测的站间双向测距值,计算比较了存在不同时标偏差情况下站间双向时间比对的结果和精度。结果表明:时标偏差影响体现的是伪距变率项和伪距径向加速度项;当时标偏差不大于1 s时,时标偏差影响主要体现的是伪距变率项;时标偏差符号相反时,对站间双向时间比对结果的影响大小一致,符号相反;时标偏差越大,对站间双向时间比对结果的影响越大。Sarted with the fundamental of TWSTT,and discussed the influence of timescale deviation on TWSTT processing precision. Combined with double pseudorange,the TWSTT result and precision were computed and compared under different timescale deviation. It is demonstrated that timescale deviation influence incarnate pseudorange variability and pseudorange radial acceleration. When timescale deviation is not greater than one second,timescale deviation influence incarnate pseudorange variability mostly. When the value of timescale deviation is equal and the sign is different,the influence on TWSTT resuh is equal and the sign is different. The more timescale deviation is,the more the influence on TWSTT result is.

关 键 词：双向时间比对 时标偏差 伪距变率 伪距径向加速度 

分 类 号：TM935.115[电气工程—电力电子与电力传动]