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利用CHAMP卫星精密轨道数据,使用新的反演方法,即能量衰减法反演了热层大气密度,并将反演结果与加速度计数据反演的大气密度以及经验模式结果对比.主要结论如下:(1)利用卫星精密轨道数据,可以使用能量衰减法反演热层大气密度,其反演结果与半长轴衰减法一致;(2)反演密度的时间间隔与反演精度相关.对于CHAMP卫星,采用20min左右的积分时间较为合适;(3)应用能量衰减法反演密度,可同时对加速度计数据进行标定;(4)使用精密轨道数据反演密度精度与卫星高度、地方时等相关.
Using the precision orbit data of CHAMP satellite, a new inversion method, that is, the energy attenuation method, is used to inverse the atmospheric density of the thermal layer and the inversion results are compared with the atmospheric density and empirical mode results of the accelerometer data retrieval.The main conclusions are as follows: (1) Using the satellite precision orbit data, the energy attenuation method can be used to inverse the atmospheric density of the thermal layer, and the inversion result is consistent with that of the semi-major axis attenuation method. (2) The time interval of inversion density is related to the inversion accuracy. For CHAMP Satellites, 20min integration time is more appropriate; (3) the application of energy attenuation method of inversion density, the accelerometer data can be calibrated at the same time; (4) the use of precision orbit inversion of density accuracy and satellite height, .