航空重力测量数据的滤波与处理  

Filtering and processing for the airborne gravimetry data

作　　者：孙中苗[1] 夏哲仁[1] 石磐[1] 王兴涛[1] 肖云[1] 李迎春[1] 

机构地区：[1]西安测绘研究所,西安710054

出　　处：《地球物理学进展》2004年第1期119-124,共6页Progress in Geophysics

摘　　要：　我国首套航空重力测量系统(CHAGS)于2002年研制成功.本文设计了CHAGS观测数据的滤波处理流程,着重讨论了比力及各项改正的滤波计算方法,提出了'两步滤波法'.基于某航空重力测量实测数据,对测线重力异常的计算精度作了比较和分析,重复测线计算结果表明,CHAGS确定测线重力异常的内符合精度优于±3mGal,相应的波长分辨率为8km;与地面实测数据向上延拓数值比较表明,对于同样的波长分辨率,外部符合精度优于±4mGal.Our first airborne gravimetry system(CHAGS) is brought to success in 2002. In this paper we designed the filtering flow chart of the CHAGS observed data and focused on the investigation on the filtering method of the specific force and the various corrections. A method named 'Two-Steps Filtering'is advanced later. Based on the real data from one airborne gravimetry test, the accuracy of the airborne gravity anomalies are compared and analyzed. The results indicated that for a half wavelength of 8.0km the inner accuracy of the airborne gravity anomalies is better than ±3mGal for the repeat surveying lines and the external accuracy is better than ±4mGal when compared to the upward continuation reference.

关 键 词：航空重力测量 垂直加速度 FIR低通滤波器 空中重力异常 

分 类 号：P223[天文地球—大地测量学与测量工程]