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/azimuth.m
function dataout=azimuth(datain) %function dataout=azimuth(datain) % %This program computes the receiver-to-shot azimuth angle %and puts the corresponding angle (in degrees) in header word 9 % %DSI customized VSP processing software %written by Gervais Perron March 4th, 1998 %$Id: azimuth.m,v 3.0 2000/06/13 19:19:47 gilles Exp $ %$Log: azimuth.m,v $ %Revision 3.0 2000/06/13 19:19:47 gilles %Release 3 % %Revision 2.0 1999/05/21 18:45:10 mah %Release 2 % %Revision 1.1 1999/01/06 19:09:01 kay %Initial revision % % %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('function dataout=azimuth(datain);') dataout=datain; for i=1:datain.fh{12} for j=1:datain.th{i}(12,1) diffn=datain.th{i}(29,j)-datain.th{i}(35,j); diffe=datain.th{i}(31,j)-datain.th{i}(37,j); dataout.th{i}(53,j)=sqrt(diffn.^2+diffe.^2); if diffn>=0 & diffe>=0 a=atan(diffn/diffe); azdeg(j)=90-(a*180/pi); azrad(j)=azdeg(j)*pi/180; elseif diffn<=0 & diffe>=0 a=atan(diffn/diffe); azdeg(j)=90+abs(a*180/pi); azrad(j)=azdeg(j)*pi/180; elseif diffn<=0 & diffe<=0 a=atan(diffn/diffe); azdeg(j)=180+90-(a*180/pi); azrad(j)=azdeg(j)*pi/180; elseif diffn>=0 & diffe<=0 a=atan(diffn/diffe); azdeg(j)=180+90+abs(a*180/pi); azrad(j)=azdeg(j)*pi/180; end end dataout.th{i}(9,:)=azdeg; dataout.th{i}(64,:)=azrad; end