Thermospheric mass density derived from CHAMP satellite precise orbit determination data based on energy balance method
Thermospheric mass density derived from CHAMP satellite precise orbit determination data based on energy balance method
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DOI：
10.1007/s11430-016-9052-1
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发表时间：
2017-08-01
影响因子：
5.7
通讯作者：
Jin ShuangGen
中科院分区：
文献类型：
--
作者：
Li Ruoxi;Lei JiuHou;Jin ShuangGen
本文利用能量平衡法从CHAMP卫星2007-2009年的精确定轨（POD）数据中反演热层质量密度。将反演的热层质量密度与加速度计数据和经验模型的质量密度进行了比较。主要结论如下：(1)利用能量平衡法和半长轴衰减法从POD数据反演热层质量密度，两者结果一致。(2)密度反演的精度与积分周期有关，POD数据CHAMP密度反演的最佳周期约为20分钟。(3)能量平衡法可用于标定加速度计数据。(4)利用POD数据反演热层密度的精度随卫星高度和当地时间的变化而变化。
In this article, the energy balance method is used to retrieve thermospheric mass density from CHAMP satellite precise orbit determination (POD) data during 2007-2009. The retrieved thermospheric mass densities are compared with those from accelerometer data and an empirical model. The main conclusions are as follows: (1) Thermospheric mass density can be retrieved from POD data by the energy balance and semi-major axis decay methods, whose results are consistent. (2) The accuracy of the retrieved densities depends on the integration time period, and the optimal period for CHAMP density retrieval from POD data is about 20 minutes. (3) The energy balance method can be used to calibrate accelerometer data. (4) The accuracy of retrieving thermospheric density from POD data varies with satellite altitude and local time.