地面重力数据向上延拓方法比较  

Comparison of Upward Continuation Methods for Ground Gravity Data

作　　者：尹伟言[1] 陈真[1] 蒋涛[2] 聂晶[1] 赵鑫[3] YIN Weiyan

机构地区：[1]国家测绘地理信息局第一大地测量队,陕西西安710054 [2]中国测绘科学研究院,北京100830 [3]国家测绘地理信息局测绘标准化研究所,陕西西安710054

出　　处：《地理空间信息》2018年第7期75-76,95,124,共3页Geospatial Information

摘　　要：利用模型梯度法和Poisson积分法将地面重力数据向上延拓,并在上延点处与航空重力测量结果进行比对。通过算例比较可知,Poisson积分法在考虑边界效应的情况下,可获得比模型梯度法更优的结果。因此,Poisson积分法可作为衡量航空重力测量外符合精度的一种手段。In this paper,we used the model gradient method and Poisson integration method to upward continue the ground gravity data,and compared with the results of airborne gravity measurement on the upward continuation points.By comparing and analyzing these two methods from examples,we found that Poisson integration method could be obtained better results than the model gradient method in considering the effect of boundary conditions.Therefore,Poisson integration method can be used as a means to evaluate external accord accuracy of airborne gravity measurement.

关 键 词：地面重力 航空重力 模型梯度法 Poisson积分法 外符合精度 

分 类 号：P223[天文地球—大地测量学与测量工程]