测绘学报 ›› 2016, Vol. 45 ›› Issue (11): 1278-1284.doi: 10.11947/j.AGCS.2016.20160284

• 大地测量学与导航 • 上一篇    下一篇

SWARM卫星简化动力学厘米级精密定轨

张兵兵1, 聂琳娟1,2, 吴汤婷1, 冯建迪1, 邱耀东1   

  1. 1. 武汉大学测绘学院, 湖北 武汉 430079;
    2. 湖北水利水电职业技术学院, 湖北 武汉 430070
  • 收稿日期:2016-06-12 修回日期:2016-08-11 出版日期:2016-11-20 发布日期:2016-12-03
  • 通讯作者: 聂琳娟 E-mail:ljnie@whu.edu.cn
  • 作者简介:张兵兵(1989-),男,博士生,研究方向为低轨卫星精密定轨。E-mail:bbzhang@whu.edu.cn
  • 基金资助:
    国家973项目(2013CB733301;2013CB733302);国家自然科学基金(41274032;41210006;41474018)

Centimeter Precise Orbit Determination for SWARM Satellite via Reduced-dynamic Method

ZHANG Bingbing1, NIE Linjuan1,2, WU Tangting1, FENG Jiandi1, QIU Yaodong1   

  1. 1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
    2. Hubei Water Resource Technical College, Wuhan 430070, China
  • Received:2016-06-12 Revised:2016-08-11 Online:2016-11-20 Published:2016-12-03
  • Supported by:
    The National Basic Research Program of China (973 Program) (Nos. 2013CB733301, 2013CB733302), The National Natural Science Foundation of China (Nos. 41274032, 41210006, 41474018)

摘要: 联合星载GPS双频观测值与简化的动力学模型,在卫星运动方程中引入适当的伪随机脉冲参数,对SWARM卫星进行精密定轨。采用星载GPS相位观测值残差、重叠轨道以及与外部轨道对比等3种方法对SWARM卫星简化动力学定轨结果进行检核。结果表明:SWARM星载GPS相位观测值残差RMS为7~10 mm;径向、切向以及法向6 h重叠轨道差值RMS均在1 cm左右,3个方向均无明显的系统误差。通过与欧空局(ESA)发布的精密轨道进行对比分析,径向轨道差值RMS为2~5 cm,切向轨道差值RMS为2~5 cm,法向轨道差值RMS为2~4 cm,3D轨道差值RMS为4~7 cm;SWARM-B定轨精度优于SWARM-A与SWARM-C。因此,采用简化动力学法与本文提供的定轨策略进行SWARM卫星精密定轨是切实可行的,定轨结果良好且稳定,定轨精度达到厘米级。

关键词: SWARM卫星, 伪随机脉冲, 简化动力学方法, 定轨策略, 厘米级

Abstract: Combining dual-frequency satellite-borne GPS observations with reduced dynamic models, and introducing proper pseudo-stochastic pulse parameters into the satellite's motion equation, SWARM satellite precise orbit determination is implemented. The orbit accuracy is assessed using three methods, which include analysis satellite-borne GPS phase observation residuals, orbit overlaps and external orbit comparisons. The results indicate that the SWARM satellite-borne GPS phase observation residual RMS is in the range of 7 to 10 mm, radial, along-track and cross-track orbit overlap difference RMS of 6 hours are about 1 cm, three directions have no significant systematic errors, comparisons with orbits computed by European Space Agency (ESA), Radial orbit difference RMS is in the range of 2 to 5 cm, along-track orbit difference RMS is in the range of 2 to 5 cm, cross-track orbit difference RMS is in the range of 2 to 4 cm, 3D orbit difference RMS is in the range of 4 to 7 cm, SWARM-B orbit accuracy is better than SWARM-A and SWARM-C. This evaluations indicate that SWARM satellite precise orbit determination is practicable by using reduced-dynamic method and orbit determining strategy in the article, the orbit solution is well and stable, the orbit accuracy reaches centimeter level.

Key words: SWARM satellite, pseudo-stochastic pulses, reduced-dynamic method, orbit determining strategy, centimeter level

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