Application of wavelet packet in gravity anomaly processing

Based on the advantages of the wavelet to separate regional field and local anomalies in MATLAB en- vironment , 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 ana- lyzing 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. Dau- bechies wavelet series has a higher precision in the wavelet packet.