Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.g13a0027s&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #G13A-0027
Other
1200 Geodesy And Gravity, 1217 Time Variable Gravity (7223, 7230), 1219 Gravity Anomalies And Earth Structure (0920, 7205, 7240), 1241 Satellite Geodesy: Technical Issues (6994, 7969)
Scientific paper
'Yet another' approach to recover gravity field from satellite data is shown. Line-of-sight acceleration data can be used to infer gravity field of the planet. Sugano and Heki (2004) showed lunar local gravity field determination method using Lunar Prospector line-of-sight acceleration data. They obtained higher resolution lunar gravity anomaly map than previous works. This method is applied to Gravity Recovery and Climate Experiment (GRACE) Level 1B data analysis. The model for Lunar Prospector was adapted to low-low-satellite configuration of the GRACE. This extension is easily achieved thanks to the simplicity of adopted model. Among the GRACE Level 1B data, KBR range acceleration data is used as line-of-sight acceleration data. Accelerometer data (ACC1B) combined with Star Camera data (SCA1B) is used to correct non-gravitational acceleration mixed in the range acceleration. GPS navigation data (GNV1B) is used to give information of satellites position after interpolation to 5 second interval. Resolution of 3 degree x 3 degree gravity map have obtained using a month data.
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