利用卫星资料研究中国南海海底地形

基金项目: 国家杰出青年科学基金资助项目(49625408);国家科委海洋863青年基金资助项目(863_818_Q03)

详细信息

Bathymetry Prediction of South China Sea from Satellite Data

School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan, China, 430079

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。
- 海深 /
- 卫星测高 /
- 重力异常 /
- FFT
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.
- bathymetry /
- satellite altimetry /
- gravity anomaly /
- FFT