基于Cryosat-2与船载重力测量数据反演我国近海海域重力异常
发布时间：2018-10-19 15:20
【摘要】：基于Cryosat-2三年半的卫星测高GDR(geophysical data records)数据,使用海面高梯度,依据最小二乘配置方法得到了南海部分海域垂线偏差格网,结合移去-恢复技术采用逆Vening-Meinesz的球面一维傅里叶变换算法快速计算我国近海海域测高重力异常CASM_GRA.与船载重力测量数据融合后,重力场精度在2.75~5.38mgal之间,平均偏差在-0.21~0.45mgal之间.与DTU13重力场模型相比,平均值最大改进为12.98mgal,标准差最大降幅近3.40mgal.与Sandwell V23.1模型相比,平均值最大改进为13.58 mgal,标准差最大降幅为1.09mgal.
[Abstract]:Based on the satellite altimetry GDR (geophysical data records) data of three and a half years from Cryosat-2, using the sea surface height gradient and the least square collocation method, the vertical deviation grid of some parts of the South China Sea is obtained. Fast calculation of gravity anomaly CASM_GRA. in offshore waters of China by using inverse Vening-Meinesz one-dimensional Fourier transform algorithm combined with removal and recovery technique After fusion with the data of shipborne gravity survey, the precision of gravity field is between 2.75~5.38mgal and the average deviation is between-0.21~0.45mgal. Compared with the DTU13 gravity field model, the maximum average value is 12.98 mgaland the maximum standard deviation is 3.40 mgal. Compared with the Sandwell V23.1 model, the maximum improvement of the average value is 13.58 mgal, standard deviation and the maximum decrease is 1.09mgal.
【作者单位】： 中国测绘科学研究院;海军大连舰艇学院海洋测绘系;
【基金】：国家重点研发计划(2016YFB0501702) 国家“九七三”重点基础研究发展计划(2013CB733302) 科技基础性工作专项(2015FY310200) 国家自然科学基金(41404034,41374081,41004004,41304009,41574004) 德意志学术交流中心(DAAD)现代大地测量空间技术全球变化监测项目(57173947)
【分类号】：P223.39
，
本文编号：2281529
[Abstract]:Based on the satellite altimetry GDR (geophysical data records) data of three and a half years from Cryosat-2, using the sea surface height gradient and the least square collocation method, the vertical deviation grid of some parts of the South China Sea is obtained. Fast calculation of gravity anomaly CASM_GRA. in offshore waters of China by using inverse Vening-Meinesz one-dimensional Fourier transform algorithm combined with removal and recovery technique After fusion with the data of shipborne gravity survey, the precision of gravity field is between 2.75~5.38mgal and the average deviation is between-0.21~0.45mgal. Compared with the DTU13 gravity field model, the maximum average value is 12.98 mgaland the maximum standard deviation is 3.40 mgal. Compared with the Sandwell V23.1 model, the maximum improvement of the average value is 13.58 mgal, standard deviation and the maximum decrease is 1.09mgal.
【作者单位】： 中国测绘科学研究院;海军大连舰艇学院海洋测绘系;
【基金】：国家重点研发计划(2016YFB0501702) 国家“九七三”重点基础研究发展计划(2013CB733302) 科技基础性工作专项(2015FY310200) 国家自然科学基金(41404034,41374081,41004004,41304009,41574004) 德意志学术交流中心(DAAD)现代大地测量空间技术全球变化监测项目(57173947)
【分类号】：P223.39
，
本文编号：2281529
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