摘要
提出了一种简便实用的重力异常推值方法──方位距离加权中数法,给出了直接使用重力异常变化梯度作为衡量平均重力异常计算精度的尺度,并运用OSU91A模型成功地建立起重力异常变化梯度与平均重力异常计算精度的相关关系,通过此关系可对海洋平均重力异常计算精度作出比较可靠的估计。
This paper presents a new method of interpolating gravity anomaly mean process with aximuth and distance asweight..And the gradient of gravityanomaly is proposed to be used as the criterionof mean anomaly accuracy. Then,therelation between gravity gradient and mean anomaly accuracy is established throughthe geopotential model OSU91A. Finally, the accuracies of marine mean free - airgravity anomalies are estimated with the relation.
出处
《武汉测绘科技大学学报》
CSCD
1995年第4期327-331,共5页
Geomatics and Information Science of Wuhan University
基金
国家"八五"重大基础研究资助项目
关键词
平均重力异常
内插
梯度
精度估计
海洋
mean free-air gravity anomaly
interpolation
gradient
accuracyestimation