The use of laser altimetry data in Chang＇E-1 precision orbit determination

The use of laser altimetry data in Chang＇E-1 precision orbit determination

Accurate altimetric measurement not only can be applied to the calculation of a topography model but also can be used to improve the quality of the orbit reconstruction in the form of crossovers. Altimetry data from the Chang＇E-1 （CE-1） laser altimeter are analyzed in this paper. The differences bet...

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Veröffentlicht in:天文和天体物理学研究：英文版 2016 (9), p.83-90
1. Verfasser: Sheng-Qi Chang Yong Huang[ Pei-Jia Li Xiao-Gong Hu Min Fan
Format: Artikel
Sprache:eng
Schlagworte:
卫星
地形模型
嫦娥一号
最小距离
测高数据
激光
约束方程
轨道确定
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creator Sheng-Qi Chang Yong Huang[ Pei-Jia Li Xiao-Gong Hu Min Fan
description Accurate altimetric measurement not only can be applied to the calculation of a topography model but also can be used to improve the quality of the orbit reconstruction in the form of crossovers. Altimetry data from the Chang＇E-1 （CE-1） laser altimeter are analyzed in this paper. The differences between the crossover constraint equation in the form of height discrepancies and in the form of minimum distances are mainly discussed. The results demonstrate that the crossover constraint equation in the form of minimum distances improves the CE- l orbit precision. The overlap orbit performance has increased - 30% compared to the orbit using only tracking data. External assessment using the topography model also shows orbit improvement. The results will be helpful for recomputing ephemeris and improving the CE-1 topography model.
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subjects 卫星
地形模型
嫦娥一号
最小距离
测高数据
激光
约束方程
轨道确定
title The use of laser altimetry data in Chang＇E-1 precision orbit determination
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