GM测高数据反演中国近海及邻域精细重力场

张胜军; 李建成; 王立伟; 孔祥雪

doi:10.3969/j.issn.0253-4193.2014.11.010

GM测高数据反演中国近海及邻域精细重力场

doi: 10.3969/j.issn.0253-4193.2014.11.010

武汉大学测绘学院, 湖北武汉 430079

基金项目: 国家重点基础研究发展计划(2013CB733301);国家自然科学基金项目(41210006,41304003);地理空间信息工程国家测绘地理信息局重点实验室资助项目(201323)。

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出版历程
- 收稿日期: 2013-12-20

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

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

摘要

摘要: 综合对比4种波形重跟踪算法,选择改进阈值法处理Jason-1 GM数据,联合波形重跟踪后的Geosat和ERS-1 GM数据,沿轨2 Hz重采样以提高数据空间分辨率。通过数据质量控制剔除粗差数据,考虑海表面地形的影响,基于移去-恢复法和维宁-曼齐兹公式反演了中国近海及邻近海域(0°~45°N,100°~140°E)1'×1'的精细重力场。船测数据检核表明反演结果在开阔海域精度约4 mGal,近岸浅水区约10 mGal,均优于DTU10和V21.1模型。
- 卫星测高 /
- 波形重跟踪 /
- 重采样 /
- 垂线偏差 /
- 重力异常
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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参考文献(12)

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