ZHAO Qile, GUO Jing, LIU Xianglin, SHI Chuang. Gravity Field Modeling on the Basis of Satellite Accelerations Directly Derived from Onboard GPS Measurements[J]. Geomatics and Information Science of Wuhan University, 2009, 34(10): 1168-1171.
Citation: ZHAO Qile, GUO Jing, LIU Xianglin, SHI Chuang. Gravity Field Modeling on the Basis of Satellite Accelerations Directly Derived from Onboard GPS Measurements[J]. Geomatics and Information Science of Wuhan University, 2009, 34(10): 1168-1171.

Gravity Field Modeling on the Basis of Satellite Accelerations Directly Derived from Onboard GPS Measurements

Funds: 国家自然科学基金资助项目(40874004);国家973计划资助项目(2006CB701301);国家863计划资助项目(2006AA12Z326,2007AA12Z345);国家教育部高等学校学科创新引智计划资助项目(B07037)
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  • Received Date: September 09, 2009
  • Revised Date: September 09, 2009
  • Published Date: October 04, 2009
  • A new gravity field modeling approach is presented.It is based on average satellite accelerations directly derived from onboard GPS phase measurements,i.e.without computing the kinematic orbit as an intermediate product.An advantage of this approach is that no ambiguity resolution is needed,and most of systematic errors that exist at neighboring epochs can be eliminated.GPS data from CHAMP and GRACE satellites covering 101-day interval were processed to recover a model of Earth's gravity field model.The results showed that calculating accelerations directly from GPS measurements improves the quality of the gravity field model by approximately 20%.
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