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- 2017
GPS卫星钟差及观测数据采样间隔对LEO卫星定轨精度影响
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Abstract:
针对GPS卫星钟差及观测数据间隔对LEO卫星运动学和约化动力学定轨的影响问题进行了分析，并使用CODE（the Center for Orbit Determination in Europe）30 s、5 s间隔GPS卫星钟差分别进行了30 s和10 s间隔观测数据的LEO卫星定轨实验。结果表明，使用5 s间隔卫星钟差（10 s间隔观测数据）相比30 s间隔卫星钟差（30 s间隔观测数据）进行GRACE卫星精密定轨，约化动力学定轨精度提高了16%，运动学定轨精度提高了8.8%；使用30 s间隔卫星钟差和10 s间隔观测数据的定轨精度最低；对于30 s间隔观测数据，使用30 s或5 s间隔卫星钟差的定轨精度基本一致
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