Abstract
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.
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Acknowledgements
We thank Dr. Sutton for providing data and helpful discussion, and Mr. Tang Geshi for useful suggestions. This work was supported by the National Natural Science Foundation of China (Grant Nos. 41325017 & 41274158).
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Li, R., Lei, J., Wang, X. et al. Thermospheric mass density derived from CHAMP satellite precise orbit determination data based on energy balance method. Sci. China Earth Sci. 60, 1495–1506 (2017). https://doi.org/10.1007/s11430-016-9052-1
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DOI: https://doi.org/10.1007/s11430-016-9052-1