ener.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	2000.06.13.19.20.10;	author gilles;	state Exp;
branches;
next	2.0;

2.0
date	99.05.21.18.45.31;	author mah;	state Exp;
branches;
next	1.2;

1.2
date	99.01.08.15.32.51;	author adam;	state Exp;
branches;
next	1.1;

1.1
date	99.01.06.19.09.03;	author kay;	state Exp;
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next	;


desc
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3.0
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@Release 3
@
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@function [dataout]=ener(datain,T1,T2)

%[dataout]=ener(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 that trace. 
%
%DSI customized VSP processing software
%written by Kristen Beaty Nov. 1997
%based on INSIGHT module 'ener'

%$Id: ener.m,v 2.0 1999/05/21 18:45:31 mah Exp gilles $
%$Log: ener.m,v $
%Revision 2.0  1999/05/21 18:45:31  mah
%Release 2
%
%Revision 1.2  1999/01/08 15:32:51  adam
%reset T2 to npts if too large
%
%Revision 1.1  1999/01/06 19:09:03  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('[dataout]=ener(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

%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

nrec=datain.fh{12}; %number of records in datain
for COUNT=1:nrec 
 x=datain.dat{COUNT}(T1:T2,:);
 x=x.*x;
 fact=sum(x);
 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{COUNT}=datain.dat{COUNT}./factgr;
end %loop over records
@


2.0
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@Release 2
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@d15 1
a15 1
%$Id: ener.m,v 1.2 1999/01/08 15:32:51 adam Exp mah $
d17 3
@


1.2
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@reset T2 to npts if too large
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@d15 1
a15 1
%$Id: ener.m,v 1.1 1999/01/06 19:09:03 kay Exp adam $
d17 3
@


1.1
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@Initial revision
@
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@d8 2
a9 2
%the sum over the specified time window of one over the amplitude squared
%of that trace.
d15 4
a18 2
%$Id:$
%$Log:$
d20 1
d57 1
a57 1
T1=round((T1-tstart)./int)+1;
d60 5
d66 1
a66 1
for COUNT=1:nrec
d68 1
a68 1
 x=x.^2;
d70 1
a70 1
 fact=fact.^0.5;
@