%0 Journal Article
%T WAVELET PRE-PROCESSING FOR HORIZONTAL ACCELERATION OF AERIAL GRAVITY MEASUREMENT<br>航空重力测量水平加速度改正的小波预处理
%A Tian Yanfeng
%A Li Shanshan
%A Xiao Fan
%A <br>田颜锋
%A 李姗姗
%A 肖凡
%J 大地测量与地球动力学
%D 2012
%I 
%X According to the spectrum characteristic of the horizontal acceleration correction in the aerial gravity measurement and the partition rules of wavelet transformation frequency band,the wavelet pre-filter scale of the horizontal acceleration correction is deduced. On the basis of the correlation among the wavelet transform scales of the signal,as an example,some surveying data were pre-processed by Haar wavelet、db4 wavelet、db6 wavelet and sym6 wavelet,and the results are compared with the results from FIR low pass filter in common use.The comparison shows that the precision of the wavelet pre-filter is higher than the FIR low pass filter in the pre-processing of the horizontal acceleration correction and it is more symmetrical as pre-processed by db serial wavelets.Thus it is proposed that the Daubechies wavelets or the sym8 wavelet with much longer branch are more useful in the pre-processing of the horizontal acceleration correction.
%K aerial gravity measurement
%K pre-filter
%K horizontal acceleration correction
%K Etvs correction
%K Fourier transform
%K wavelet transform<br>航空重力测量
%K 预滤波
%K 水平加速度改正
%K 厄特弗斯改正
%K 傅里叶变换
%K 小波变换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=DA72A78627FE64EAA572951EA05D274A&jid=73A1A428591E600EF664B596512A2997&aid=28538CA98C3000783470E810E87E37B3&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=0B39A22176CE99FB&sid=EDA22B444205D04A&eid=EFD65B51496FB200&journal_id=1671-5942&journal_name=大地测量与地球动力学&referenced_num=0&reference_num=0