Analyzing the geolocation precision of TDOA using formation-flying cluster of three microsatellites

被引：0

作者：

Song X. ^{[1
,2
]}

Mao Y. ^{[1
,2
]}

Zong W. ^{[1
,2
]}

Wang L. ^{[1
,2
]}

Feng L. ^{[1
,2
]}

机构：

[1] State Key Laboratory of Geo-Information Engineering, Xi'an

[2] Xi'an Research Institute of Surveying and Mapping, Xi'an

来源：

Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | 2023年 / 52卷 / 10期

基金：

中国国家自然科学基金;

关键词：

formation flying; geolocation precision; low earth orbit satellite; passive geolocation; time different of arrive;

D O I：

10.11947/j.AGCS.2023.20220269

中图分类号：

学科分类号：

摘要：

Geolocating of the radio-frequency(RF) emitters with formation-flying cluster of microsatellite has become an efficient means to monitor the non-cooperative RF targets on the earth's surface, and the key technique involved is to geolocate the emitters with space-based TDOA measurement. The main factor impacting the space-based TDOA measurement is analyzed in this paper. Two TDOA geolocation methods, namely the single epoch geolocation with the constraint of geodetic height and multi-epoch geolocation are presented for the formation-flying cluster of three microsatellites, and the precisions are validated by simulation test. The results show that the precision of the single epoch geolocation method of TDOA and the multi-epoch geolocation can meet 510 and 110 m, respectively, when the non-cooperative targets on sea surface are monitored by the equilateral triangular formation-flying microsatellites. The geolocation error becomes more remarkable for targets near the satellite ground-track when the equilateral triangular formation satellites adopt the combined configuration with one satellite at a higher latitude and the other two at lower ones. © 2023 SinoMaps Press. All rights reserved.

引用

页码：1631 / 1639

页数：8

共 25 条

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