Volume 38 Issue 2
Mar.  2018
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MIAO Juan, REN Tingling, GONG Jiancun, LIU Siqing, LI Zhitao. Analysis and Verification of Thermospheric Density Derived from CHAMP and GRACE-A/B Accelerometer Data ormalsize[J]. Chinese Journal of Space Science, 2018, 38(2): 201-210. doi: 10.11728/cjss2018.02.201
Citation: MIAO Juan, REN Tingling, GONG Jiancun, LIU Siqing, LI Zhitao. Analysis and Verification of Thermospheric Density Derived from CHAMP and GRACE-A/B Accelerometer Data ormalsize[J]. Chinese Journal of Space Science, 2018, 38(2): 201-210. doi: 10.11728/cjss2018.02.201

Analysis and Verification of Thermospheric Density Derived from CHAMP and GRACE-A/B Accelerometer Data ormalsize

doi: 10.11728/cjss2018.02.201
  • Received Date: 2017-07-07
  • Rev Recd Date: 2017-11-26
  • Publish Date: 2018-03-15
  • The data of thermospheric total mass density derived from the high-accuracy accelero-meter on board the CHAMP and GRACE-A/B satellites during 2001-2008 at 400km altitude are analyzed. NRLMSISE-00 is selected as the reference model for comparing with those derived density. Mean Absolute Error (MAE) and Mean Relative Error (MRE) between derived and NLRMSISE-00 model values are given. The characteristics and causes of these errors are analyzed. The density variation and their rationality are also discussed. Moreover, the reliability of the derived density is verified by TLEs density. The main conclusions are as follows. Density obtained by CHAMP is larger than those obtained by GRACE-A/B at 400km altitude. The errors between the density obtained by CHAMP and model value are smaller than those between GRACE-A/B and model. There is a global deviation between the density obtained by CHAMP and model. The density variation in the similar space environment and the density obtained by TLEs show that the density in 2001 obtained by CHAMP is lower than actual values. Examples of the density obtained by CHAMP and GRACE-A/B indicate that there are some individual characteristics of the density obtained by the satellites, and they should be analyzed and chosen in application.

     

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