handrot.m,v

具有特色的地震数据处理源码

head	3.0;
access;
symbols;
locks; strict;
comment	@// @;


3.0
date	2000.06.13.19.20.20;	author gilles;	state Exp;
branches;
next	2.0;

2.0
date	99.05.21.18.45.38;	author mah;	state Exp;
branches;
next	1.2;

1.2
date	99.05.19.21.02.10;	author mah;	state Exp;
branches;
next	1.1;

1.1
date	99.03.17.19.20.40;	author mah;	state Exp;
branches;
next	;


desc
@to perform rotation by header word
@


3.0
log
@Release 3
@
text
@function [dataout]=handrot(datain,headw1,comp1,comp2)

%handrot - function to rotate horizontal components for borehole data (DSI etc.) into
%radial and transverse components according to an angle contained in a trace header word
%
%function [dataout]=handrot(datain,headw1,comp1,comp2)
%
%INPUT VARIABLES
%'datain' must be in official DSI data format
%each record must represent a component x, y, or z in that order
%this can be achieved using 'sortrec'
%
% headw1 = header word containing the rotation angle in degrees
% comp1 = component to be maximized
% comp2 = component to be minimized
%
% Please note: Software does not check for reasonable parameters or dead traces
%
%DSIsoft ver 2.0
%DSI customized VSP processing software
%
%Written by Marko Mah March 1999

%$Id: handrot.m,v 2.0 1999/05/21 18:45:38 mah Exp gilles $
%$Log: handrot.m,v $
%Revision 2.0  1999/05/21 18:45:38  mah
%Release 2
%
%Revision 1.2  1999/05/19 21:02:10  mah
%version number
%
%Revision 1.1  1999/03/17 19:20:40  mah
%Initial revision
%
%
%
%
%Copyright (C) 1998 Seismology and Electromagnet+ic 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]=handrot(datain,headw1,comp1,comp2)');

w=pi/180;

trclength=datain.fh{7}; %number of points per trace
smpint=datain.fh{8}; %smpint is the sampling interval
dataout=datain;

%check to make sure data is separated into components

%ntr is the number of traces in each record

for COUNT=3:-1:1 %get number of traces in each component
	ntr(COUNT)=datain.th{COUNT}(12,1);
end %for

if (ntr(1)~=ntr(2)) | (ntr(1)~=ntr(3))
	error('check data format - different number of traces in components');
end%if

if length(datain.dat)~=3
	error('data must have only 3 records - one for each of x, y and z');
end %if

%*************************************************************************

for COUNT1=1:ntr
  sinangmx=sin((datain.th{1}(headw1,COUNT1))*w);
  cosangmx=cos((datain.th{1}(headw1,COUNT1))*w);

  for COUNT2=1:trclength
    data1=datain.dat{comp1}(COUNT2,COUNT1);
    data2=datain.dat{comp2}(COUNT2,COUNT1);
    dataout.dat{comp1}(COUNT2,COUNT1)=data1*cosangmx + data2*sinangmx; %radial
    dataout.dat{comp2}(COUNT2,COUNT1)=-data1*sinangmx + data2*cosangmx; %transverse
  end %loop over samples
end %for COUNT1

%make changes to trace header
dataout.th{comp1}(4,:)=4;
dataout.th{comp2}(4,:)=5;
@


2.0
log
@Release 2
@
text
@d24 1
a24 1
%$Id: handrot.m,v 1.2 1999/05/19 21:02:10 mah Exp mah $
d26 3
@


1.2
log
@version number
@
text
@d24 1
a24 1
%$Id: handrot.m,v 1.1 1999/03/17 19:20:40 mah Exp mah $
d26 3
@


1.1
log
@Initial revision
@
text
@d19 1
a19 1
%DSIsoft ver 1.0
d24 5
a28 2
%$Id: $
%$Log: $
@