中国空间科学技术（中英文）2025，Vol.45Issue(1)：12-23,12.DOI:10.16708/j.cnki.1000-758X.2025.0002
陆地探测四号星载GNSS导航系统设计及在轨效能分析
Design and on-orbit efficiency analysis of onboard GNSS system for LT4A satellite
摘要
Abstract
The analysis of the onboard high-orbit GNSS navigation receiver system applied on the LuTan-04A(LT4A),the world's first Inclined Geosynchronous Orbit(IGSO)Synthetic Aperture Radar(SAR)satellite,is presented.The study investigates the precise orbit determination(POD)performance of the high-orbit GNSS receiver system and reports its engineering application for post-precise orbit determination for the first time.By collecting on-orbit data of BDS and GPS signal anomalies,the quality of onboard observational data and the POD are analyzed and evaluated.Experimental results indicate that the LT4A satellite onboard high-orbit GNSS navigation receiver system can stably capture and track BDS B1I and GPS L1 navigation signals,meeting the requirements for high-orbit real-time positioning,orbit determination,and post-mission precise orbit determination.Utilizing joint orbit determination of onboard BDS+GPS,the in-track accuracy can achieve radial better than 1.87m and three-dimensional better than 3.07m.In response to the characteristics of high-orbit navigation satellite acquisition and the timeliness requirements of applications,the orbit determination system can operate fully automatically throughout the entire process,ensuring the smoothness and continuity of the orbit,and controlling the introduction of high-order Legendre errors.The relevant achievements of this study can be applied to future high-orbit Earth observation satellite missions equipped with GNSS receivers.关键词
陆地探测四号01卫星/倾斜地球同步轨道/合成孔径雷达/全球导航定位系统/事后精密定轨/在轨实时自主定轨Key words
LuTan-04A/inclined geosynchronous orbit/synthetic aperture radar/global navigation satellite system/precise orbit determination/onboard real-time autonomous orbit determination分类
天文与地球科学引用本文复制引用
王振兴,王煜斌,毛志毅,田晓彬,刘志佳,黄勇,邵明学..陆地探测四号星载GNSS导航系统设计及在轨效能分析[J].中国空间科学技术（中英文）,2025,45(1):12-23,12.基金项目
国家重点研发计划资助(2023YFB3904902) （2023YFB3904902）
国家自然科学基金(42204020) （42204020）
