| 联合多代测高数据建立中国海域重力异常模型 |
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| 引用本文： | 邓凯亮,暴景阳,刘雁春,章传银,许军.联合多代测高数据建立中国海域重力异常模型[J].测绘科学,2009,34(1). |
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| 作者姓名： | 邓凯亮 暴景阳 刘雁春 章传银 许军 |
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| 作者单位： | 1. 海军大连舰艇学院海测工程系,辽宁大连,116018
2. 中国测绘科学研究所大地所,北京,100039 |
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| 基金项目： | 实验室开放研究基金，测绘科技发展基金 |
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| 摘 要： | 本文联合T/P数据、T/P新轨道数据、ERS数据、GFO数据、GeosatGM数据和ERS-1/168数据,用测高卫星记录点的位置信息直接计算沿轨大地水准面的方向导数,结合测线轨迹方向的方位角在交叉点处推求垂线偏差,然后利用逆Vening-Meinesz公式计算了中国近海(0o～41oN,105o～132oN)2′×2′格网分辨率的海域重力异常模型。将其与CLS_SHOW99重力异常模型比较,统计结果表示与该模型差异的RMS为8.15mgal,在剔除差值大于20mgal的点(剔除3.3%)以后,RMS为4.72mgal;与某海区船测重力异常比较的RMS为8.91mgal。
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| 关 键 词： | 卫星测高 垂线偏差 重力异常 |
Determination of gravity anomalies over China sea by combination of multi-satellite altimeter data |
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| DENG Kai-liang,BAO Jing-yang,LIU Yan-chun,ZHANG Chuan-yin,XU Jun.Determination of gravity anomalies over China sea by combination of multi-satellite altimeter data[J].Science of Surveying and Mapping,2009,34(1). |
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| Authors: | DENG Kai-liang BAO Jing-yang LIU Yan-chun ZHANG Chuan-yin XU Jun |
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| Abstract: | Based on multi-satellite altimeter data(Geosat GM data,ERS-1 data,T/P data,new T/P data,ERS-2 data and GFO data),the direction-differential coefficient of geoid along track is computed using position information of altimetry point.Being combined with the azimuth angle of the direction of altimetry line,the deflection of the vertical is reckoned at the crossover point,and the 2'×2'gravity anomaly model of China sea and its adjacent sea areas(0o～41oN,105o～132oN) is obtained using inverse Vening-Meinesz formula.The gravity anomaly model is compared with CLS_SHOW9 model,the corresponding RMS of the difference is 8.15mgal,after eliminating error point where the difference is more than 20mgal(the proportion of the point eliminated is 3.3%),the corresponding RMS of the difference is 4.72mgal,and compared with the shi Pborne gravimetric date,the corresponding RMS of difference is 8.91mgal. |
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| Keywords: | altimetry deflection of the vertical gravity anomaly |
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