Global Geology 2012, 15(2) 187-190 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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Keywords
wavelet packet analysis
gravity data
local anomalies
analytical continuation
Authors
ZHANG Hong and WU Yangang
PubMed
Article by ZHANG Hong and WU Yangang

Application of wavelet packet in gravity anomaly processing

ZHANG Hong and WU Yangang

College of Geo-Exploration Science and Technology,Jilin University,Changchun 130026,China

Abstract

Based on the advantages of the wavelet to separate regional field and local anomalies in MATLAB environment, a high-precision regional-residual separation was finally realized. Analytical continuation and trend surface analysis are conventional methods for gravity anomaly separation. But the wavelet packet analysis in analyzing gravity data can make the gravity anomaly to be computed at a higher precision. In this paper,wavelet packet method is used to process gravity anomaly data obtained in Laos,and the separation result is good. Daubechies wavelet series has a higher precision in the wavelet packet.

Keywords wavelet packet analysis   gravity data   local anomalies   analytical continuation  
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