物探与化探2018，Vol.42Issue(1)：185-191,7.DOI:10.11720/wtyht.2018.1.23
级联分样与分频段功率谱计算的大地电磁张量阻抗估算对比
A comparison of magnetotelluric impedance estimation effects with cascade and sub-band frequency spectrum calculation methods
摘要
Abstract
Cascade and sub-band frequency spectrum calculation are two power spectrum calculation methods in magnetotelluric data processing.This paper is based on Welch power spectrum calculation method,and sets the processing parameters under the same conditions,so as to use two spectrum calculation methods to estimate magnetotelluric impedance with simulated data and field data respectively.The results show that,for both the apparent resistivity and the impedance phase,the two power spectrum calculation methods obtain nearly the same results for the simulated data and the field data;nevertheless,the sounding curve with sub-band frequency spectrum calculation method is more continuous and more reasonable than that with cascade method at lower frequency,while at high frequency,the cascade method can get slightly better curves than sub-band frequency spectrum calculation.关键词
级联分样/分频段功率谱计算/大地电磁/张量阻抗Key words
cascade/sub-band frequency spectrum calculation/magnetotelluric/tensor impedance分类
天文与地球科学引用本文复制引用
张刚,庹先国,王绪本,李怀良..级联分样与分频段功率谱计算的大地电磁张量阻抗估算对比[J].物探与化探,2018,42(1):185-191,7.基金项目
国家自然科学基金项目(41704105),中国博士后科学基金项目(2017M610611),国家高技术研究发展计划(“863”计划)项目“长周期分布式大地电磁观测系统”(2014AA06A612),国家重大科学仪器设备开发专项“大深度三维电磁探测技术工程化开发”(2011YQ05006007) （41704105）
