基于北斗卫星校准的连接端站干涉测量与定轨

doi:10.12305/j.issn.1001-506X.2021.05.18

Abstract

Abstract:

To improve the angular accuracy of connected-element interferometry (CEI) measurement for geostationary satellite orbit(GEO) satellites, the calibration based on radio source is needed to remove the most of common errors. The large aperture and high-gain antenna is usually necessary to receive weak signal from radio source. Using Beidou satellite for calibration is presented based on existing antenna in ground station. The CEI measurement is carried out for Tianlian GEO satellite on 20 km baseline between two antennas in using two sets of antenna equipment 20 km apart from Kashi TT&C station tracking and data relay satellite system (TDRSS). After calibration by Beidou satellite, the accuracy of time-delay measurement is 0.03 ns. The position accuracy of orbit determination is 37 m using 7 h of ranging from single station and CEI measurements. The position uncertainty of 12 h prediction reaches 78 m. The result is corresponded to the accuracy of orbit determination of 24 h from multi-station ranging system 3 000 km apart. Therefore, using the calibrated CEI could effectively improve the utilization of ground stations and GEO orbit determination accuracy.

Key words: global navigation satellite system(GNSS), geostationary satellite orbit(GEO), tracking and data relay satellite system, short baseline interferometry, very long baseline interferometry, accuracy analysis for orbit determination

CLC Number:

V448.21

Min FAN, Yong HUANG, Lei HUANG, Shaowu CHEN, Zan LI. Using CEI for GEO orbit determination based on Beidou satellite calibration[J]. Systems Engineering and Electronics, 2021, 43(5): 1303-1309.

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References 32

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参数	VLBI技术	CEI技术
基线长度	数千至上万千米	10~100 km
天线设备	25~70 m大口径高增益天线	2~10 m口径天线
频率源	各站需要高稳氢钟作为独立本振	同一频率源, 通过光纤链路进行同步
标校源	射电源	北斗导航卫星
测量量及精度	群时延, 5 ns(S频段)	相时延, 10 ps量级(S频段)
实时性	事后处理	实时或准实时处理

误差类型	日期
误差类型	2018-08-15	2018-08-16	2018-08-22	2018-08-23
CEI测量弧段	14:00~21:00, 7 h	17:30~21:30, 4 h	14:00~16:30, 18:30~20:00, 间隔2 h共6 h	15:00~15:30, 2.5 h
位置误差/m	37	109	57	135
位置误差在基线方向的分量误差/m	21	8	23	7

Using CEI for GEO orbit determination based on Beidou satellite calibration

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