时间域航空电磁响应数值模拟的精度分析  

Precision analysis of numerical simulation for time-domain airborne electromagnetic response

作　　者：西永在[1] 吴珊[1] 廖桂香[1] 李文杰[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《物探与化探》2014年第6期1190-1194,共5页Geophysical and Geochemical Exploration

基　　金：中国地质科学院地球物理地球化学勘查研究所基本科研业务费专项资金项目(AS2013J04)

摘　　要：分析说明了G-S变换和汉克尔变换的计算精度,当n=12或16时,G-S变换适用范围广且能保证精度;而汉克尔变换计算的相对精度达到10-6数量级;并且基于时间域航空电磁法偶极—偶极装置一维正演算法,在选取不同参数时,对航空电磁响应数值模拟精度进行了分析。结果表明G-S变换n值的选取对计算精度影响相对较大,而汉克尔变换中滤波参数的选取对计算精度影响较小。This paper has analyzed the calculation precision of G-S transformation and Hankel transformation, when n = 12 or 16, G- S transform applicability is wide and can assure accuracy, and the relative accuracy of Hankel transform is up to 10^-6 orders. Based on time-domain airborne electromagnetic method in time domain and dipole-dipole device 1-D forward modeling algorithm, , the authors analyzed the precision of response to airborne electromagnetic wave when different parameters were selected. The results show that the G-S transformation value of an influence on calculation accuracy is considerable, and selection of parameters of Hankel transformation filtering has small effects on calculation accuracy.

关 键 词：时间域航空电磁法 G-S变换 汉克尔变换 精度分析 

分 类 号：P631[天文地球—地质矿产勘探]