Real-time precise orbit determination for BDS satellites using the square root information filter
Real-time precise orbit determination for BDS satellites using the square root information filter
复制标题
利用平方根信息滤波器对北斗卫星进行实时精确定轨
DOI：
10.1007/s10291-019-0827-1
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发表时间：
2019-04
期刊：
影响因子：
4.9
通讯作者：
Shi Chuang
中科院分区：
文献类型：
--
作者：
Dai Xiaolei;Lou Yidong;Dai Zhiqiang;Qing Yun;Li Min;Shi Chuang
虽然全球导航卫星系统(GNSS)超快速轨道产品被广泛用于实时应用，但批量最小二乘(LSQ)平差和精密定轨(POD)预报对进行机动的卫星来说是有限的。为了生成真正实时的轨道乘积，我们引入了平方根信息滤波(SRIF)实时POD策略，其中实现了一种适应不规则卫星行为的随机模型的实时卫星机动处理算法。首先使用来自多个GNSS实验(MGEX)网络和BDS实验跟踪站(BET)的1个月数据来评估SRIF POD战略的性能。与GFZ(GBM)提供的MGEX最终产品相比，SRIF解显示出比超快速解更高的精度。对于BDS IGSO和MEO卫星，SRIF解决方案与GBM最终产品之间的轨道差的平均3D RMS约为29.1厘米和22.5厘米。SRIF产生的BDS轨道始终是连续的，而超快轨道在轨道更新时表现出明显的跳跃和不连续。卫星激光测距(SLR)验证表明，对于GEO卫星，SRIF解具有较好的稳定性和连续性，而GBM最终产品在日边界附近表现出明显的精度劣化。为了评估机动操纵的性能，在BDS、GEO和IGSO卫星的10个机动算例上进一步测试了所提出的方法。准确检测到不同情况下所有机动事件的开始和结束时间，与官方公布的一致。采用该策略，该滤波器在机动过程中避免发散，输出连续的轨道解，并在机动结束后约7.5小时内恢复到正常的POD。
Though widely used to generate the global navigation satellite system (GNSS) ultra-rapid orbit products for real-time applications, the batch least-squares (LSQ) adjustment and precise orbit determination (POD) prediction is limited for satellites undergoing maneuvers. To generate the truly real-time orbit products, we introduce the square root information filter (SRIF) real-time POD strategy, in which a real-time satellite maneuver handling algorithm that adapts the stochastic model for irregular satellite behaviors is implemented. The performance of the SRIF POD strategy is first evaluated with 1-month of data from multi-GNSS experiment (MGEX) network and BDS experimental tracking stations (BETS). Compared with the MGEX final products provided by GFZ (GBM), the SRIF solutions show higher precision than the ultra-rapid solutions. The averaged 3D RMS of the orbit differences between the SRIF solutions and the GBM final product is about 29.1 cm and 22.5 cm for the BDS IGSO and MEO satellites. The BDS orbits generated by SRIF are continuous over all the time, while the ultra-rapid orbits exhibit obvious jumps and discontinuity at the orbit update time. Validation by satellite laser ranging (SLR) shows that for GEO satellites, the SRIF solutions have better stability and continuity, whereas the GBM final products exhibit obvious accuracy degradation around the day boundary. To evaluate the performance of maneuver handling, the proposed method is further tested on 10 maneuver cases of BDS GEO and IGSO satellites. The start and end time of all maneuver events in different cases are precisely detected, which are consistent with the officially announced ones. Using the proposed strategy, the filter avoids divergence and outputs continuous orbit solutions during the maneuver periods and restores the normal POD within about 7.5 h after the maneuver is finished.
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影响因子：
5.2
作者：
L. Oman;A. Robock;G. Stenchikov;T. Thordarson
通讯作者：
L. Oman;A. Robock;G. Stenchikov;T. Thordarson
DOI：
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发表时间：
1992
期刊：
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影响因子：
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作者：
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DOI：
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2005
期刊：
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影响因子：
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DOI：
--
发表时间：
2013-09
期刊：
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影响因子：
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作者：
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通讯作者：
D. Laurichesse;L. Cerri;J. Berthias;F. Mercier
DOI：
--
发表时间：
2013
期刊：
--
影响因子：
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作者：
O. Montenbruck;P. Steigenberger;R. Khachikyan;G. Weber;R. Langley;L. Mervart;U. Hugentobler
通讯作者：
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