| GM测高数据反演中国近海及邻域精细重力场 |
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| 引用本文： | 张胜军,李建成,王立伟,孔祥雪.GM测高数据反演中国近海及邻域精细重力场[J].海洋学报,2014,36(11):85-89. |
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| 作者姓名： | 张胜军 李建成 王立伟 孔祥雪 |
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| 作者单位： | 武汉大学 测绘学院, 湖北 武汉 430079 |
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| 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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| 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-1GM数据,联合波形重跟踪后的Geosat和ERS-1GM数据,沿轨2Hz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4mGal,近岸浅水区约10mGal,均优于DTU10和V21.1模型。
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| 关 键 词： | 卫星测高 波形重跟踪 重采样 垂线偏差 重力异常 |
| 收稿时间： | 2013/12/20 0:00:00 |
Refined marine gravity field of the China's seas and its adjacent area derived from GM altimeter data |
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| Zhang Shengjun,Li Jiancheng,Wang Liwei and Kong Xiangxue.Refined marine gravity field of the China's seas and its adjacent area derived from GM altimeter data[J].Acta Oceanologica Sinica (in Chinese),2014,36(11):85-89. |
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| Authors: | Zhang Shengjun Li Jiancheng Wang Liwei and Kong Xiangxue |
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| Institution: | School of Geodesy and Geomatic, Wuhan University, Wuhan 430079, China |
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| 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. |
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| Keywords: | satellite altimetry waveform retracking resample vertical deflection gravity anomaly |
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