| 星载BDS/GPS低轨卫星定轨精度分析 |
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| 引用本文： | 熊超,贾小林,朱俊,卢传芳.星载BDS/GPS低轨卫星定轨精度分析[J].测绘科学,2017,42(6). |
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| 作者姓名： | 熊超 贾小林 朱俊 卢传芳 |
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| 作者单位： | 1. 西安航天天绘数据技术有限公司,西安,710100;2. 地理信息工程国家重点实验室,西安710054;西安测绘研究所,西安710054;3. 宇航动力学国家重点实验室,西安710043;中国西安卫星测控中心,西安710043 |
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| 基金项目： | 国家自然科学基金项目，中国博士后科学基金项目，地理信息工程国家重点实验室基金项目 |
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| 摘 要： | 针对低轨卫星搭载BDS/GPS接收机实现定轨将成为定轨领域热点的现状,该文讨论了基于星载BDS/GPS实时定轨和精密定轨需要考虑的数学模型,阐述了实时定轨和精密定轨的模型差异。基于自主研发程序,利用高动态信号仿真器仿真的星载BDS/GPS数据研究了基于星载BDS/GPS实时定轨和精密定轨的可行性及其能达到的精度。试验结果表明,星载BDS/GPS实时定轨位置精度为1.19m,速度精度为2.35mm/s。GPS信号发生中断时即仅采用BDS观测数据进行实时定轨时,三维位置误差达到3.73m;星载BDS/GPS精密定轨位置精度为2.30cm,仅采用BDS观测数据进行精密定轨时,三维位置误差可达到8.26cm。
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| 关 键 词： | 实时定轨 精密定轨 BDS 联合定轨 |
Precision analysis of orbit determination with space-borne BDS and GPS measurements for LEO satellite |
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| XIONG Chao,JIA Xiaolin,ZHU Jun,LU Chuanfang.Precision analysis of orbit determination with space-borne BDS and GPS measurements for LEO satellite[J].Science of Surveying and Mapping,2017,42(6). |
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| Authors: | XIONG Chao JIA Xiaolin ZHU Jun LU Chuanfang |
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| Abstract: | Based on real-time orbit determination and precision orbit determination with space-borne BDS and GPS measurements,the mathematical models of real-time orbit determination and precision orbit determination with space-borne BDS and GPS measurements was put forward in this paper in order to deal with the issues in real-time orbit determination and precision orbit determination of LEO satellite with BDS and GPS receiver.And then the difference of real-time orbit determination and precise orbit determination was presented in details.Based on the self-developed program,feasibility and precision of real-time orbit determination and precision orbit determination were analyzed using the stimulated BDS and GPS measurements generated by high dynamic signal simulator.The results showed that the orbit accuracy of real-time orbit determination with space-borne BDS and GPS measurements can achieve 1.19 meter and the velocity accuracy can achieve 2.35 millimeter per second.The orbit accuracy of real-time orbit determination with space-borne BDS measurements only can achieve 3.73 meter when the GPS signals were unavailable.And that the orbit accuracy of precision orbit determination can achieve 2.30 centimeter.The orbit accuracy of precision orbit determination with space-borne BDS measurements only can achieve 8.26 centimeter. |
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| Keywords: | real-time orbit determination precision orbit determination BeiDou satellite navigation system combined orbit determination |
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