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/txplane.m
function [t]=txplane(s,r,x,dip,strike,v) % txplane: function to calculate the traveltime in a medium with constant % velocity v, given a source at s=[sx;sy;sz] and receiver at r=[rx;ry;rz], % with a reflection from a plane with given dip and strike, passing through % the point x=[x;y;z]. % INPUT: s = [sx; sy; sz], source position % r = [rx; ry; rz], receiver position % x = [x; y; z], a point on the plane % v = velocity of medium (constant) % dip = dip of plane (horizontal -> dip=0 (degrees) % strike = strike of plane (clockwise from N in degrees) % OUTPUT: travel time. % Note, reflection point position is calculated but not yet returned. %DSI customized VSP processing software %by I. Kay (April 1999) %$Id: txplane.m,v 3.0 2000/06/13 19:22:31 gilles Exp $ %$Log: txplane.m,v $ %Revision 3.0 2000/06/13 19:22:31 gilles %Release 3 % %Revision 2.0 1999/05/21 18:46:57 mah %Release 2 % %Revision 1.2 1999/04/15 19:51:03 kay %fixed definition of strike... % %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 dip=dip*pi/180; strike=strike*pi/180; n=[sin(dip)*cos(strike); sin(dip)*sin(strike); cos(dip)]; p=dot(n,x); rimage = r+2*(p - dot(n,r) )*n; l=sqrt(dot( (s-rimage), (s-rimage))); t=l/v; %cdp=s+ (p-dot(n,s))/(dot(n,rimage)-dot(n,s))*(rimage-s);