📄 medirm.html

📁 具有特色的地震数据处理源码
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<TITLE>/</TITLE><BODY><A HREF = "../index.html">[Master Index]</A><A HREF = "index.html">[Index for ./main]</A><H1>medirm</H1><H2>(./main/medirm.m)</H2><HR><H3>Function Synopsis</H3><pre>[dataout,medi_data]=medirm(datain,tmax,win,v,static)</pre><HR><H3>Help text</H3><pre>[dataout,medi_data]=medirm(datain,tmax,win,v,static)(flattens by <A HREF = "../8.main/velocity.html">velocity</A> and shot static)or[dataout,medi_data]=medirm(datain,tmax,win,headwd)(flattens by pick times)Module to remove a downgoing wave using a median filter.Data (in DSI format) is flattened according to the <A HREF = "../8.main/velocity.html">velocity</A> of the wave tobe removed or else according to pick times and <A HREF = "../8.main/trim.html">trim</A> statics are applied.Flattened data are then median filtered and this filtered dataset is storedin the variable 'filt_data' and subtracted form the dataset.  <A HREF = "../8.main/trim.html">Trim</A> staticshifts are stored in trace header word 25.  Shifts done to flatten thevelocity are removed but <A HREF = "../8.main/trim.html">trim</A> statics are not.This routine is advantageous because it buffers the data so that none islost from doing time shifts.  This is especially good for trying to removethe S wave without loosing reflections that arrive before it.tmax - maximum time shift to be considered by <A HREF = "../8.main/trim.html">trim</A> statics (try ~ 0.01s)win - window for median filter (must be an odd number)v - <A HREF = "../8.main/velocity.html">velocity</A> of wave to be removedstatic - shot static (s) (used to calculate window in which to perform <A HREF = "../8.main/trim.html">trim</A>headwd - header word that first break pick times are stored inUses other DSI modules (<A HREF = "../8.main/tred.html">tred</A>, <A HREF = "../8.main/flat.html">flat</A>, <A HREF = "../8.main/unflat.html">unflat</A>, trim, ener, <A HREF = "../8.main/medi_filt.html">medi_filt</A>, and <A HREF = "../8.main/subr.html">subr</A>)DSI customized VSP processing softwarewritten by Kristen Beaty January, 1998</pre><HR><H3>Cross-Reference Information</H3>This function calls<pre><UL><LI><A HREF = "../8.main/ener.html">ener</A>           ./main/ener.m</LI><LI><A HREF = "../8.main/flat.html">flat</A>           ./main/flat.m</LI><LI><A HREF = "../8.main/medi_filt.html">medi_filt</A>      ./main/medi_filt.m</LI><LI><A HREF = "../8.main/subr.html">subr</A>           ./main/subr.m</LI><LI><A HREF = "../8.main/tred.html">tred</A>           ./main/tred.m</LI><LI><A HREF = "../8.main/trim.html">trim</A>           ./main/trim.m</LI><LI><A HREF = "../8.main/unflat.html">unflat</A>         ./main/unflat.m</LI></UL></pre><HR>Produced by <A HREF = "http://www.nd.edu/Courses/kantor/matlab/mat2html">mat2html</A> on Wed Jun 14 15:21:32 Canada/Eastern 2000<BR>Cross-Directory links are: ON<BR></BODY>
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