sectaec.m

Univ. of Calgary CREWS的免费地震研究软件

function sect = sectaec(sect,t,op_length,trip)

% sectout = sectaec(sectin,t,op_length,trip)
%
% SECTAEC runs automatic gain correction on a seismic matrix.
%
% sectin ... input section of size nsamp x ntr. That is one trace per
%	column.
% t ... nsamp long time coordinate vector for sectin
% op_length= half-length of triangular smoother in seconds
% trip= front end time before which the smoothed envelope is
%        set to a constant ******** default= op_length/10 ******
% sectout ... output section of size nsamp x ntr.
%
% G.F. Margrave, CREWES Project, University of Calgary, 2000
%
% NOTE: It is illegal for you to use this software for a purpose other
% than non-profit education or research UNLESS you are employed by a CREWES
% Project sponsor. By using this software, you are agreeing to the terms
% detailed in this software's Matlab source file.
 
% BEGIN TERMS OF USE LICENSE
%
% This SOFTWARE is maintained by the CREWES Project at the Department
% of Geology and Geophysics of the University of Calgary, Calgary,
% Alberta, Canada.  The copyright and ownership is jointly held by 
% its author (identified above) and the CREWES Project.  The CREWES 
% project may be contacted via email at:  [e-mail]
% 
% The term 'SOFTWARE' refers to the Matlab source code, translations to
% any other computer language, or object code
%
% Terms of use of this SOFTWARE
%
% 1) Use of this SOFTWARE by any for-profit commercial organization is
%    expressly forbidden unless said organization is a CREWES Project
%    Sponsor.
%
% 2) A CREWES Project sponsor may use this SOFTWARE under the terms of the 
%    CREWES Project Sponsorship agreement.
%
% 3) A student or employee of a non-profit educational institution may 
%    use this SOFTWARE subject to the following terms and conditions:
%    - this SOFTWARE is for teaching or research purposes only.
%    - this SOFTWARE may be distributed to other students or researchers 
%      provided that these license terms are included.
%    - reselling the SOFTWARE, or including it or any portion of it, in any
%      software that will be resold is expressly forbidden.
%    - transfering the SOFTWARE in any form to a commercial firm or any 
%      other for-profit organization is expressly forbidden.
%
% END TERMS OF USE LICENSE

if(nargin<4)
	trip=op_length/10.;
end

[nsamp,ntr]=size(sect);

if(length(op_length)==1)
   op_length=op_length*ones(1,ntr);
elseif(length(op_length)~=ntr)
   error('invalid number of entries for op_length')
end

if(length(trip)==1)
   trip=trip*ones(1,ntr);
elseif(length(trip)~=ntr)
   error('invalid number of entries for trip')
end

for k=1:ntr
	sect(:,k) = aec( sect(:,k),t,op_length(k),trip(k));
end