海洋平均重力异常计算与精度估计
Calculation and Accuracy Estimation of Marine Mean Free-Air Gravity Anomaly
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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。Abstract: This paper presents a new method of interpolating gravity anomaly mean process with aximuth and distance as weight.And the gradient of gravity anomaly is proposed to be used as the criterion of mean anomaly accuracy.Then,the relation between gravity gradient and mean anomaly accuracy is established through the geopotential model OSU91A.Finally,the accuracies of marine mean free-air gravity anomalies are estimated with the relation.
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