Refined marine gravity field of the China's seas and its adjacent area derived from GM altimeter data

Zhang Shengjun; Li Jiancheng; Wang Liwei; Kong Xiangxue

doi:10.3969/j.issn.0253-4193.2014.11.010

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Zhang Shengjun, Li Jiancheng, Wang Liwei, Kong Xiangxue. Refined marine gravity field of the China's seas and its adjacent area derived from GM altimeter data[J]. Haiyang Xuebao, 2014, 36(11): 85-89. doi: 10.3969/j.issn.0253-4193.2014.11.010

Citation:

Zhang Shengjun, Li Jiancheng, Wang Liwei, Kong Xiangxue. Refined marine gravity field of the China's seas and its adjacent area derived from GM altimeter data[J]. Haiyang Xuebao, 2014, 36(11): 85-89. doi: 10.3969/j.issn.0253-4193.2014.11.010

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Refined marine gravity field of the China's seas and its adjacent area derived from GM altimeter data

doi: 10.3969/j.issn.0253-4193.2014.11.010

School of Geodesy and Geomatic, Wuhan University, Wuhan 430079, China

Received Date: 2013-12-20

Abstract

Abstract

The advanced threshold method was selected for processing the Jason-1 geodetic mission waveform data based on the comparative analysis of four waveform retracking methods. Combined with the retracked ERS-1 and Geosat geodetic mission data,the along-track data were resampled at 2Hz to improve the spatial resolution of coastal areas. Considering the influence of sea surface topography after the data quality control process,a refined 1'×1' resolution gravity field of the China sea and its adjacent sea areas(0°~45°N,100°~140°E) was obtained by remove-restore method and Vening-Meinesz formula. The validation with shipborne data showed that the accuracy of inversion result is about 4 mGal and 10 mGal in open seas and shallow water areas,respectively. Moreover,the inversion result is better than both of the DTU10 model and the V21.1 model.
- satellite altimetry,
- waveform retracking,
- resample,
- vertical deflection,
- gravity anomaly

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References(12)

References

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