# Sample input data for the complete ray tracing program 'crt.for'.
# Initial-value ray tracing of rays shot in a single vertical plane
# from the point source.
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Input files required
  chk.pl: "data/len/" "len-mod.dat"
  chk.pl: "data/len/" "len-rpar.dat"
  chk.pl: "data/len/" "len-rec.dat"
  chk.pl: "data/len/" "len-src.dat"
  chk.pl: "data/len/" "len-crt.dat"
  chk.pl: "crt/"      "codep2.dat"
  chk.pl: "crt/"      "writsrf.dat"

  MODEL='len-mod.dat'  # Model
  SRC='len-src.dat'    # File with the coordinates of the initial point
  REC=' '              # No receivers in this example
  DCRT='len-crt.dat'   # Numerical parameters for complete ray tracing
  CODE='codep2.dat'    # Ray codes for refracted and reflected P waves
  INIPAR=2             # Geographic-like spherical ray parameters
  RPAR='len-rpar.dat'  # Ray-parameter domain and control
  WRIT='writsrf.dat'   # Names and extent of output files
  CRTLOG='len-log.out' # Output log file

  crt: len-crti.h /    # Running program crt.for with these data

# ----------------------------------------------------------------------
#
# The sample 3-D model consists of two layers and of the lenticular
# inclusion with edges, situated in the upper layer, see the schematic
# Figure 5 in V.Cerveny, L.Klimes, I.Psencik: Complete Seismic-Ray
# Tracing in 3-D Structures (In: D.Doornbos, ed.: Seismological
# Algorithms, Academic Press 1988).
#
# Files 'len-mod.dat', 'len-src.dat', 'len-crt.dat', 'codep2.dat',
# 'len-rpar.dat' and 'writsrf.dat'
# contain the sample input data for the complete ray tracing program.
# These demo data correspond to a very simple initial-value ray tracing
# of rays shot in a single vertical plane from the point source.
# For the two-point ray tracing in this model refer to history file
# 'len-crt.h'.
#
# 'len-log.out' is the output log file containing very brief notes on
# the program running.
#
# Remarks within the formatted input data files:
#     The comments in brackets situated at the ends of lines, after the
#             input items, are not the part of the input data.  They are
#             just remarks placed so as to be skipped when reading the
#             input data.
#     The last input line of a data file is usually followed by
#             (a) Empty line, line '====' and empty line, or by
#             (b) Empty line, line '----', empty line, text describing
#                 the input data, empty line, line '====' and empty
#                 line.