Inversion of Marine Gravity Anomalies and Geoid Using
Multi-Satellite Altimeter Data
1 Provincial Geomatics Centre of Jiangsu, 75 West-Beijing Road, Nanjing 210013, China
2 School of Earth Sciences and Engineering，Hohai University，1 Xikang Road, Nanjing 210098, China
3 Zhejiang Academy of Surveying and Mapping，83 North-Baoshu Road, Hangzhou 310012, China
Abstract：Multi-satellite altimeter data were used to study and the method of combined crossover adjustment was completed.Systematic bias might be reduced with the method.The meridional component and prime vertical component of the residual vertical deflections of Zhejiang offshore were determined using the weighted method of alongtrack least squares with an appropriate search radius.On the basis of removerestore method and FFT technology，the gravity anomaly model and geoid model gridded with a spatial resolution of 2.5′ of Zhejiang offshore were determined using the residual vertical deflections with an appropriate integration radius，under the consideration of effects of innermost zone.The gravity anomaly computed by the method was compared with the shipborne gravity，the RMS of the difference is ±5.231 58 mGal.The marine geoid was compared with the results calculated with EGM96 and EGM2008，the RMS of the difference is ±0.694 57 m and ±0.029 51 m.
LIANG Ziliang,CHEN Lu,XIE Kun et al. Inversion of Marine Gravity Anomalies and Geoid Using
Multi-Satellite Altimeter Data[J]. jgg, 2015, 35(1): 40-44.
