低轨道卫星重复周期的设计方法及其对重力场反演的影响

研究低轨卫星重复周期的设计原理,给出相应的计算公式。基于此对不同轨道高度卫星的重复周期进行数值仿真,并利用动力学方法分析不同重复周期轨道星下点轨迹的空间采样对重力场反演精度的影响。结果表明,卫星的重复周期与其轨道高度的变化并不成线性关系,并且在顾及重力场时间分辨率的情况下,长重复周期能够提高卫星地面轨迹的空间采样,为重力场解算提供较好的条件。...

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Published in测绘学报 Vol. 42; no. 2; pp. 191 - 195
Main Author 赵倩 姜卫平 徐新禹 邹贤才 彭利峰
Format Journal Article
LanguageChinese
Published 武汉大学卫星导航定位技术研究中心,湖北武汉430079%武汉大学卫星导航定位技术研究中心,湖北武汉,430079%武汉大学测绘学院,湖北武汉,430079 2013
中国测绘科学研究院,北京100830
Subjects
星下点轨迹
重力场反演
重复周期
重力场反演
重复周期
星下点轨迹
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ISSN1001-1595

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Summary:研究低轨卫星重复周期的设计原理,给出相应的计算公式。基于此对不同轨道高度卫星的重复周期进行数值仿真,并利用动力学方法分析不同重复周期轨道星下点轨迹的空间采样对重力场反演精度的影响。结果表明,卫星的重复周期与其轨道高度的变化并不成线性关系,并且在顾及重力场时间分辨率的情况下,长重复周期能够提高卫星地面轨迹的空间采样,为重力场解算提供较好的条件。
Bibliography:11-2089/P
repeating period; sub-track; gravity field recovery
ZHAO Qian1,2,JIANG Weiping2,XU Xinyu3,ZOU Xiancai3,PENG Lifeng2 1.Chinese Academy of Surveying and Mapping,Beijing 100830,China;2.GNSS Research Center,Wuhan University,Wuhan 430079,China;3.School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China
Algorithm of LEO repeating period is discussed and the corresponding equations are presented.The repeating period is calculated under different orbit altitudes.The influence of sub-track sampling on gravity field inversion precision is simulated and analyzed with different repeating periods by dynamics method.The result shows that the repeat period does not show a linear increase with orbit altitude,and the performance of sub-track sampling and gravity field solution can be improved by long repeating period orbit in case of taking into account the time resolution of the gravity field.
ISSN:1001-1595