中国空间科学技术

中国空间科学技术

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IAU1976、1980及2000A岁差章动模型的比较

王明明;罗建军;马卫华;   

  1. 西北工业大学航天学院;
  • 发布日期:2009-10-25

Comparison of IAU1976,1980 and IAU2000A Precession-nutation Model

Wang Mingming Luo Jianjun Ma Weihua(College of Astronautics,Northwestern Polytechnical University,Xi′an 710072)   

  • Online:2009-10-25

被引次数

27

摘要： 卫星精密定轨中,需要计算天球坐标系(CRF)到地球固联坐标系(TRF)之间的转换。由于天球坐标系到地球固联坐标系转换涉及岁差和章动,如何选择精度更高、误差更小的岁差章动计算模型是首要解决的问题。文章介绍了IAU1976岁差模型、IAU1980章动模型以及IAU2000A岁差章动模型,并对不同的岁差章动模型进行建模仿真。通过对比得出,IAU2000A岁差章动模型较IAU1976岁差模型、IAU1980章动模型可以给出更高的定轨精度。

关键词: 岁差, 章动, 坐标变换, 地球质心力学时, 太阳质心力学时

Abstract: For precise satellite orbit determination,the transformation should be done between the Celestial Reference Frame(CRF) and the Terrestrial Reference Frame(TRF).Precession and nutation should be considered during coordinate transformation from the CRF to the TRF.IAU1976 precession model,IAU1980 nutation model and IAU2000A precession-nutation model were presented,the differences were compared with IAU2000A precession-nutation model.The results indicate that IAU2000A model is more precise.