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/dsisoftv3/dsisoftv3/main/ener3c.m
function [dataout]=ener3c(datain,T1,T2) %[dataout]=ener3c(datain,T1,T2) % %This function will do energy balancing on the traces in datain based %on the amplitudes of the data in the time window between times T1 %and T2 (both in seconds). Each trace is multiplied by a factor equal to %the sum over the specified time window of one over the amplitude squared %of the traces from the 3 components. This version preserves the %amplitude ratio between the components. % %DSI customized VSP processing software %written by G. Bellefleur March,2000 %based on ener.m written by Kristen Beaty Nov. 1997 %written based on INSIGHT module 'ener' %$Id: ener3c.m,v 3.0 2000/06/13 19:20:10 gilles Exp $ %$Log: ener3c.m,v $ %Revision 3.0 2000/06/13 19:20:10 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 disp('[dataout]=ener3c(datain,T1,T2)') dataout=datain; tstart=datain.fh{9}; %start time in seconds int=datain.fh{8}; %sampling interval in seconds npts=datain.fh{7}; %number of points per trace nrec=datain.fh{12}; %number of records in datain % Check if nrec=3 if (nrec==3) %find indexes of T1 and T2 T1=round((T1-tstart)./int)+1; T2=round((T2-tstart)./int)+1; %if T2 is larger than tmax then reset to npts if (T2 > npts) T2= npts; end temp1=datain.dat{1}(T1:T2,:); temp2=datain.dat{2}(T1:T2,:); temp3=datain.dat{3}(T1:T2,:); temp1=temp1.*temp1; temp2=temp2.*temp2; temp3=temp3.*temp3; fact=sum([temp1; temp2; temp3])/3; fact=sqrt(fact); i=find(fact==0); fact(i)=1; %avoid divide by zero error for dead traces factgr=meshgrid(fact,1:npts); dataout.dat{1}=datain.dat{1}./factgr; dataout.dat{2}=datain.dat{2}./factgr; dataout.dat{3}=datain.dat{3}./factgr; else text = sprintf('WARNING! This version of ener3c requires 3 components'); disp(text); end %end check if nrec=3