![]() Based on short arc approach, a software named ANalyst of Gravity Estimation with Low-orbit Satellites (ANGELS) was developed by us. Because of small accumulative numerical integration error and stronger flexibility to deal with data gaps, short arc approach is selected and applied to do the analysis in this work. Here we try to answer this research question by numerical simulations.Several methodologies have been widely used to process the data collected by GRACE mission, such as variation equation approach, acceleration approach, energy integral approach and short arc approach. To that end, the minimum requirements of the key payloads are of great importance to be clarified. ![]() One of the goals of China's future satellite mission is to improve the accuracy of the gravity field model by a factor of 10, compared with that of GRACE. In this paper, we focus on the simulation study of China's future satellite gravity mission which is proposed by Chinese Academy of Sciences, cooperating with Huazhong University of Science and Technology, Aerospace Dongfanghong Satellite Company and so on. Thus many research groups begun to propose the next generation of low-low satellite to satellite tracking mission, such as the GRACE Follow-On mission from the National Aeronautics and Space Administration and the German Aerospace Center, the Earth System Mass Transport Mission (e.motion) from the European Space Agency, and China's future satellite gravity mission. GRACE, however, will terminate in the near future. ![]() Gravity Recovery And Climate Experiment mission (GRACE), which was launched in 2002, has provided a viable way to investigate the mass variations happened on the Earth surface. ![]()
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