'SAMPLE INPUT DATA S1-CRT.DAT: INCIDENT PLANE WAVE.  1994, JANUARY 23.'

'MODEL.DAT'
'DCRT.DAT'
' '
'S1-CODE.DAT'
'S1-RPAR.DAT'
'WRIT.DAT'
'LOG.OUT'

'INIT - PLANE WAVE INCIDENT AT THE MODEL BOTTOM AT 45 DEGREES:'
2    0                (INITIAL SURFACE, IN CARTESIAN COORDINATES)
4                     (NUMBER MFUNC OF FUNCTIONS SPECIFIED)
'X1-COORDINATE' 1
1 0 0 0               (X1-COORDINATE IS A FUNCTION OF RAY PARAMETER G1)
2                     (NUMBER OF GRID POINTS)
  0 60                (G1 GRID COORDINATES)
  0 60                (X1-COORDINATE COINCIDES WITH RAY PARAMETER G1)
'X2-COORDINATE' 2
2 0 0 0               (X2-COORDINATE IS A FUNCTION OF RAY PARAMETER G2)
2                     (NUMBER OF GRID POINTS)
-20 20                (G2 GRID COORDINATES)
-20 20                (X2-COORDINATE COINCIDES WITH RAY PARAMETER G2)
'X3-COORDINATE' 3
 0 0 0 0              (X3-COORDINATE=CONSTANT, TENSION=0)
-25                   (BOTTOM OF THE MODEL)
'TRAVEL TIME' 4
1 0 0 0               (INITIAL TIME IS FUNCTION OF RAY PARAMETER G1)
2                     (NO. OF GRID POINTS: LINEAR FUNCTION = PLANE WAVE)
  0 60                (G1 GRID COORDINATES)
  0  6.060915         (ANGLE OF INCIDENCE IS 45 DEGREES)
'END OF DATA FOR THE INITIAL SURFACE' /

------------------------------------------------------------------------

  THE MODEL WITH A HOMOGENEOUS LENTICULAR INCLUSION IN A CONSTANT
  VELOCITY GRADIENT LAYER IS DESCRIBED BY THE DEMO DATA FILE 'MODEL.DAT'
  OF PACKAGE 'MODEL'.  THE SAME NUMERICAL RAY TRACING PARAMETERS
  'DCRT.DAT' AND OUTPUT FILE NAMES (SEE 'WRIT.DAT') AS FOR THE POINT
  SOURCE ARE USED.

  THE ABOVE DATA SPECIFY A PLANE WAVE INCIDENT AT THE BOTTOM OF THE
  MODEL (X3=-25).  THE PLANE OF INCIDENCE IS PARALLEL TO THE X1X3 PLANE,
  THE ANGLE OF INCIDENCE IS 45 DEGREES.  THE INITIAL TRAVEL TIME IS 0
  ALONG THE LEFT-HAND BOTTOM EDGE OF THE MODEL (X1=0, X3=-25).
  HORIZONTAL SLOWNESS COMPONENT IS THUS
  SIN(45DEG)/V=SQRT(2)/7=0.10101525.
  THE RAY PARAMETERS G1,G2 ARE CHOSEN TO COINCIDE WITH CARTESIAN
  COORDINATES X1,X2.

========================================================================