摘要
给出了一套基于直角坐标系下的垂线偏差求解重力异常公式 ,并将之发展成为一套新的沿轨迹重力异常求解公式。据此 ,利用Geosat/GM、ERS 1/ 35d及Topex/Posei don 3种测高数据 ,反演了南中国海域 ( 0°～ 2 5°N ,10 5°～ 12 2°E)的 2’× 2’重力异常———IGG S。通过与实际船测资料和国际同行提供的重力模型相比 ,IGG S总体精度达到 10× 10 - 5m/s2 。
A new gravity recovery method with along track vertical deflections is developed independently on the basis of the Laplace's equation in Cartesian system. The method can be easily approached with 1D Hilbert transform and the along track gravity anomalies can be derived directly from the along track slopes of sea surface height (SSH). The 2'×2' gravity anomalies limited in South China Sea (0°～25°N, 105°～122°E)——IGG S are recovered from Geosat/GM, ERS 1/35day and Topex/Poseidon altimeter data using the method mentioned above. From the comparisons with practical ship borne data and external data sets of SIO, KMS and Hwang, respectively, it can be seen clearly that the accuracy of IGG S achieves 10×10 -5 m/s 2 (RMS) which is almost the same as that of external data sets.
出处
《高技术通讯》
CAS
CSCD
2000年第11期46-49,42,共5页
Chinese High Technology Letters
基金
863计划(818-06-01-05)
国家自然科学基金(49904003
49634140)资助项目
关键词
卫星测高数据
沿轨迹重力异常反演
南中国海域
Satellite altimetry
Inversion of along-track gravity anomalies
South China Sea
