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Title: A modified acceleration-based monthly gravity field solution from GRACE data
Authors: Chen, QJ
Shen, YZ
Chen, W 
Zhang, XF
Hsu, HZ
Ju, XL
Keywords: Satellite geodesy
Geopotential theory
Time variable gravity
Issue Date: 2015
Publisher: Oxford University Press
Source: Geophysical journal international, 2015, v. 202, no. 2, p. 1190-1206 How to cite?
Journal: Geophysical journal international 
Abstract: This paper describes an alternative acceleration approach for determining GRACE monthly gravity field models. The main differences compared to the traditional acceleration approach can be summarized as: (1) The position errors of GRACE orbits in the functional model are taken into account; (2) The range ambiguity is eliminated via the difference of the range measurements and (3) The mean acceleration equation is formed based on Cowell integration. Using this developed approach, a new time-series of GRACE monthly solution spanning the period January 2003 to December 2010, called Tongji_Acc RL01, has been derived. The annual signals from the Tongji_Acc RL01 time-series agree well with those from the GLDAS model. The performance of Tongji_Acc RL01 shows that this new model is comparable with the RL05 models released by CSR and JPL as well as with the RL05a model released by GFZ.
ISSN: 0956-540X (print)
1365-246X (online)
DOI: 10.1093/gji/ggv220
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