摘要
我国新一代北斗导航系统试验卫星搭载了高精度星间链路载荷并已经得到了实测数据。本文给出了星间链路数据预处理方法,并介绍了星间链路数据独立定轨和星间Ka测量与L波段数据联合定轨的方法和初步结果。利用3颗试验卫星和1个地面Ka站在轨试验,结果表明:独立采用星间链路定轨,其结果 R方向误差小于0.5m;星间链路数据与L波段数据联合定轨,其对L波段定轨结果有显著改善,轨道R方向误差小于0.3m;星间测量设备时延标校精度优于0.1m。
The experimental satellite of BD navigation system has assembled inter-satellite link（ISL）payloads and has obtained the real ISL observation data.The paper presents the preprocessing method of ISL and the POD method and result for Ka only observation and the combination Ka observation with L-band.It＇s showed that：the radial orbiterrorislessthan0.5mwithKaonly observation;theradialorbiterrorislessthan0.3mwiththe observation by combining the Ka ISL with L-band data which has improved the orbit accuracy remarkably in contrast to L-band only data;the accuracy of calibrating device delayisbetterthan0.1m.
出处
《测绘学报》
EI
CSCD
北大核心
2017年第5期547-553,共7页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金(41204020)~~
关键词
北斗导航卫星
星间链路
精密定轨
自主定轨
设备时延
BD navigation satellite
inter-satellite link
precision orbit determination
autonomous orbit determination
device delay
