gusucode.com > DSISoft是由加拿大地质调查局发布的用于垂直地震剖面(VSP)数据处理的免费软件包 > dsisoftv3/main/tube_time.m
function [dataout]=tube_time(datain,hdr1,hdr2,v); % %function [dataout]=tube_time(datain,hdr1,hdr2,v); % %This function removes all tube wave occurences on a DSI profil %by means of median filtering. The function introduces travel times for typical %upgoing and downgoing tube waves. It uses those travel times to flat and filter the data % %Input variables: %datain = dsisoft variable in 3-component %hdr1 = header word to put the upgoing travel times %hdr2 = header word to put the downgoing travel times %v = estimated tube wave velocity % %Output variable: %dataout = dsisoft variable with tube waves filtered out % %Written by G. Perron, May 2000 %$Id: tube_time.m,v 3.0 2000/06/13 19:22:27 gilles Exp $ %$Log: tube_time.m,v $ %Revision 3.0 2000/06/13 19:22:27 gilles %*** empty log message *** % % %Copyright (C) 1998 Seismology and Electromagnetic Section/ %Continental Geosciences Division/Geological Survey of Canada % %This library is free software; you can redistribute it and/or %modify it under the terms of the GNU Library General Public %License as published by the Free Software Foundation; either %version 2 of the License, or (at your option) any later version. % %This library is distributed in the hope that it will be useful, %but WITHOUT ANY WARRANTY; without even the implied warranty of %MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU %Library General Public License for more details. % %You should have received a copy of the GNU Library General Public %License along with this library; if not, write to the %Free Software Foundation, Inc., 59 Temple Place - Suite 330, %Boston, MA 02111-1307, USA. % %DSI Consortium %Continental Geosciences Division %Geological Survey of Canada %615 Booth St. %Ottawa, Ontario %K1A 0E9 % %email: dsi@cg.nrcan.gc.ca tzero=datain.th{1}(15,1); datain.th{1}(hdr1,1)=datain.th{1}(15,1); for i=2:datain.fh{13} tzero=datain.th{1}(hdr1,i-1); tdist=sqrt((datain.th{1}(35,i)-datain.th{1}(35,i-1)).^2+(datain.th{1}(37,i)-datain.th{1}(37,i-1)).^2+(datain.th{1}(39,i)-datain.th{1}(39,i-1)).^2); datain.th{1}(hdr1,i)=tzero+(tdist/v); end datain.th{2}(hdr1,:)=datain.th{1}(hdr1,:); datain.th{3}(hdr1,:)=datain.th{1}(hdr1,:); tzero=datain.th{1}(15,datain.fh{13}); datain.th{1}(hdr2,datain.fh{13})=datain.th{1}(15,datain.fh{13}); for i=datain.fh{13}-1:-1:1 tzero=datain.th{1}(hdr2,i+1); tdist=sqrt((datain.th{1}(35,i)-datain.th{1}(35,i+1)).^2+(datain.th{1}(37,i)-datain.th{1}(37,i+1)).^2+(datain.th{1}(39,i)-datain.th{1}(39,i+1)).^2); datain.th{1}(hdr2,i)=tzero+(tdist/v); end datain.th{2}(hdr2,:)=datain.th{1}(hdr2,:); datain.th{3}(hdr2,:)=datain.th{1}(hdr2,:); dataout=datain;