Volume 33 Issue 5
Sep.  2013
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Chen Xuxing, Hu Xiong, Xiao Cunying, Wang Xijing. Comparison of the Thermospheric Densities Between GRACE/CHAMP Satellites Data and NRLMSISE-00 Model[J]. Chinese Journal of Space Science, 2013, 33(5): 509-517. doi: 10.11728/cjss2013.05.509
Citation: Chen Xuxing, Hu Xiong, Xiao Cunying, Wang Xijing. Comparison of the Thermospheric Densities Between GRACE/CHAMP Satellites Data and NRLMSISE-00 Model[J]. Chinese Journal of Space Science, 2013, 33(5): 509-517. doi: 10.11728/cjss2013.05.509

Comparison of the Thermospheric Densities Between GRACE/CHAMP Satellites Data and NRLMSISE-00 Model

doi: 10.11728/cjss2013.05.509
  • Received Date: 2012-09-21
  • Rev Recd Date: 2013-07-17
  • Publish Date: 2013-09-15
  • NRLMSISE-00 model is widely used in orbit determination and prediction of low-Earth orbit satellites. In order to calibrate the atmospheric density of NRLMSISE-00, the density errors of the model were analyzed by comparing with the observations from GRACE and CHAMP satellites. The density of the model was generally larger than that observed by GRACE and CHAMP satellites, especially under low solar activity. The density of the model showed higher accuracy at high latitude and its error varied with latitude and longitude. At the same location on the same orbit, density error of the model varied with local time and reached its maximum at 02:00LT and 15:00LT while reached its minimum at about 10:00LT and 20:00LT relatively. The 10.7cm solar radio flux (F10.7 index) showed high correlation with the density errors. The density of the model showed low accuracy during the solar minimum while good accuracy during the solar maximum. The model density showed better result at CHAMP satellite orbit with lower altitude comparing to the GRACE orbit. The error has less correlation with ap index during relatively quiet period of geomagnetic field (ap< 27).

     

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