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<TITLE>/</TITLE><BODY><A HREF = "../index.html">[Master Index]</A><A HREF = "index.html">[Index for ./cdpt3d]</A><H1>cdp3d</H1><H2>(./cdpt3d/cdp3d.m)</H2><HR><H3>Function Synopsis</H3><pre>[refpoints]=cdp3d(datain,v,strike,dip)</pre><HR><H3>Help text</H3><pre>[dataout]=cdp3d(datain,v,strike,dip)three dimensional CDP (common depth point) transformfinds reflection points in 3 dimensions using rotations and ray tracing methodcreates a 3 dimensional grid of bins, sums trace energy corresponding in the bin corresponding to its reflection point for a given strike and dip of the geology, normalizes by the number of traces contributing energy to each binuses functions '<A HREF = "../3.cdpt3d/refpoints3d.html">refpoints3d</A>'use 'solve3d' for a picture of ray paths and reflection pointsuse '<A HREF = "../3.cdpt3d/slicefmap.html">slicefmap</A>' to extract 2D vertical or horizontal slices from the 3D volume these slices can then be displayed using '<A HREF = "../6.display/dispseis.html">dispseis</A>' (DSISoft) or else 'pcolor' or 'imagesc' (MATLAB).INPUTdatain - dataset in DSI format shot and receiver locations and travel time information are taken from the headers trace headers 31, 29 and 33 are shot easting, northing and elevation respectively (x,y,z) trace headers 37, 35, and 39 are receiver easting, northing, and elevation respectively travel time startime:samplingrate:endtime (file headers 9, 8 and 10 respectively)v - <A HREF = "../8.main/velocity.html">velocity</A> of the waves (m/s)strike - strike angle in degrees from North (or mine grid North)dip - dip angle to the right, by convention, also in degreesOUTPUTdataout - the results of performing a 3D CDP transform on the input data format is a modified DSI variable. File and trace headers still exist but the .dat section has been replaced with a .fmap extension which contains a cell array (records) of 3 dimensional arrays. This is the results of the 3D CDP transform. There are also .xsc, .ysc, and .zsc extensions, each containing vectors describing the coordinates of the centre of each of the bins.written by K.S. Beaty July, 1998last modified May, 1999by G. PerronSignificantly modified May 2000by G. Bellefleur </pre><HR><H3>Cross-Reference Information</H3>This function calls<pre><UL><LI><A HREF = "../3.cdpt3d/refpoints3d.html">refpoints3d</A> ./cdpt3d/refpoints3d.m</LI></UL></pre>This function is called by<pre><UL><LI><A HREF = "../3.cdpt3d/cdpt3d.html">cdpt3d</A> ./cdpt3d/cdpt3d.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>⌨️ 快捷键说明
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