help_text.cc

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// DO NOT EDIT: this file is automatically derived from help_text.txt
#include "help_text.h"
char help_text[]=
{
  "outfile      name of output file to contain results\n"
  "infile       input file\n"
  "             t:T select traces T, where T may be any range\n"
  "                 specification like '3-4' or '5,6,7-12,20'\n"
  "             f:F specifies an input file format differing from\n"
  "                 the format selected by \"-type\"\n"
  "\n"
  "informational output:\n"
  "-xhelp[=type] print detailed information regarding file formats\n"
  "             if \"type\" is specified, just print text for file format \"type\"\n"
  "-listexperimental \n"
  "             list experimental and non-operational options\n"
  "-v           be verbose\n"
  "-DEBUG       produce debug output\n"
  "\n"
  "data file input and output:\n"
  "-o           overwrite output\n"
  "-type type   choose input file format (default: sff)\n"
  "-Type type   choose output file format (default: sff)\n"
  "\n"
  "filter alternatives:\n"
  "default: Fourier domain application of analytic filter coefficents\n"
  "-fdfilter    apply numerically derived Fourier coefficients of 1/sqrt(t)\n"
  "-tdfilter    apply 1/sqrt(t) in the time domain by discrete convolution\n"
  "-pad n       in the case of Fourier domain processing, the time series\n"
  "             is padded with zeroes to factor n of the number of samples\n"
  "             of the input series prior to the Fourier transformation\n"
  "\n"
  "taper alternatives:\n"
  "-taperlast   tapers are applied prior to filtering by default; this\n"
  "             option selects to taper the time series after filtering\n"
  "             If this option is selected, the order of the processing\n"
  "             steps (which are not commutative) is reversed.\n"
  "-sqrttaper   By default we use r*sqrt(2/t) as the taper and scaling\n"
  "             function (direct-wave transformation). This is appropriate for\n"
  "             direct waves. In the case of reflected waves commonly the\n"
  "             propagation velocity is assumed to be known (see option\n"
  "             -velocity). Then the scaling function is v*sqrt(2*t), where v is\n"
  "             the assumed phase velocity (reflected-wave transformation).\n"
  "             The latter is selected by this option.\n"
  "-tapdel t    delay taper function by t seconds; this accounts for\n"
  "             the finite duration of a band limited source signal\n"
  "-tapslo s    delay taper by not more than s*offset, where s is a\n"
  "             slowness in s/m; serves as an upper limit for tapdel\n"
  "             at small offsets\n"
  "\n"
  "1/sqrt(t) construction:\n"
  "the default operation to handle the singularity at t=0 is:\n"
  "  choose samples of 1/sqrt(t) such that they produce the\n"
  "  same mean values as the continuous function when being\n"
  "  integrated over one sampling interval\n"
  "-integshift f shift time axis by a fraction f of the sampling interval\n"
  "             in order to adjust centroid of integration interval\n"
  "the following options are for experimental purposes only:\n"
  "-nointeg     do not derive samples by integration; sample 1/sqrt(t)\n"
  "             directly and optionally use the following parameters to\n"
  "             control the bevahiour close to t=0\n"
  "             deprecated method\n"
  "if -nointeg is selected:\n"
  "-tshift f    to avoid the singularity of 1/sqrt(t) at t=0, sampling time\n"
  "             is shifted by a fraction f of the sampling interval\n"
  "-tlim f      to avoid the singularity of 1/sqrt(t) at t=0, the sample\n"
  "             time for samples at times smaller than f*dt, where dt is\n"
  "             the sampling interval, is set to a given fraction of the\n"
  "             sampling interval (see option -tfac)\n"
  "-tfac f      to avoid the singularity of 1/sqrt(t) at t=0, the sample\n"
  "             time at small times (see options -tlim) is set to a\n"
  "             fraction f of the sampling interval\n"
  "\n"
  "Single-velocity transformation:\n"
  "-fredomain   apply transformation in the frequency domain for a\n"
  "             single direct wave velocity.\n"
  "-exact       apply the exact transformation for the single-velocity approach\n"
  "             (Forbriger 2014, eq. 31); the default is to apply the far-field\n"
  "             approximation (Forbriger 2014, eq. 30)\n"
  "\n"
  "-velocity v  set assumed wave velocity in km/s\n"
  "\n"
  "Hybrid transformation:\n"
  "-transition r1,r2 mix both approaches; up to offset r1 the \"single\n"
  "             velocity transformation\" is used; for offsets larger than\n"
  "             r2 the \"direct wave transformation\" is used; in between\n"
  "             both are mixed with continously varying percentage\n"
  "             from one to the other\n"
  "\n"
  "Additional options:\n"
  "-limitlength some convolution schemes return a larger number of samples\n"
  "             than present in the input series (due to padding for\n"
  "             example); this option limits to numer of output samples\n"
  "             to the number of input samples\n"
  "\n"
  "-spatialdistance\n"
  "             use spatial distance to source instead of offset along surface,\n"
  "             whereever a distance is required\n"
};