罗佳, 李建成, 姜卫平. 利用卫星资料研究中国南海海底地形[J]. 武汉大学学报 ( 信息科学版), 2002, 27(3): 256-260.
引用本文: 罗佳, 李建成, 姜卫平. 利用卫星资料研究中国南海海底地形[J]. 武汉大学学报 ( 信息科学版), 2002, 27(3): 256-260.
LUO Jia, LI Jiancheng, JIANG Weiping. Bathymetry Prediction of South China Sea from Satellite Data[J]. Geomatics and Information Science of Wuhan University, 2002, 27(3): 256-260.
Citation: LUO Jia, LI Jiancheng, JIANG Weiping. Bathymetry Prediction of South China Sea from Satellite Data[J]. Geomatics and Information Science of Wuhan University, 2002, 27(3): 256-260.

利用卫星资料研究中国南海海底地形

Bathymetry Prediction of South China Sea from Satellite Data

  • 摘要: 基于海洋重力异常与海深之间的密切关系,推导了利用FFT技术由重力异常计算海深的模型;利用该模型联合卫星测高数据和海洋重力资料反演了中国南海2.5'×2.5'海底地形;探讨了各种地球物理信息对于反演海底地形的影响。

     

    Abstract: This paper focuses on the study of bathymetry prediction from satellite altimeter data and the use of FFT technique.In this study,the free-air gravity anomalies over the South China Sea are determined by the satellite altimeter data of GEOSAT,ERS-1,ERS-2 and T/P.And the 2.5'×2.5' bathymetry model in the South China Sea is calculated from the gravity anomalies by the inversion model given in this paper.After the analyses of the inversion results,some conclusions can be drawn.1) In deep-water area(>4 000m),the accuracy of the bathymetry calculated from gravity anomalies is better than that of the TBASE model by over 15%.2) The calculating results contain the significant system error.3) In the bathymetry calculating,eliminating the system error is helpful.4) In the shallow-water area,the accuracy of the results almost has not been improved relative to the TBASE model.

     

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