iroute - equals 1 to plot to the screen, 2 to create a postscript
file, 3 to create a plot file for the VERSATEC plotter, or 4
to create a colour postscript file; if iroute does not equal 1
there is no plotting to the screen (default: 1)
iseg - create a Uniras segment(s) (default: 0)
iplot - generate the plot during the run (1), or write all plot
commands to the file p.out (0), or do both (2) (default: 1)
imod - plot model boundaries (default: 1)
ibnd - plot vertical model boundaries (default: 1)
idash - plot model boundaries as dashed lines (default: 1)
ivel - plot the P-wave (1) or S-wave (-1) velocity values (km/s)
within each trapezoid of the model (default: 0)
iray - plot all rays traced (1) or only those which reach the
surface (or reflect off the floating reflector for ray groups for
which frbnd>0) (2); rays traced in the search mode are not
plotted unless irays=1 (see below) (default: 1)
irays - plot the rays traced in the search mode (default: 0)
irayps - plot the P-wave segments of ray paths as solid lines
and the S-wave segments as dashed lines (default: 0)
idot - plot a symbol at each point (step length) defining each ray
path (default: 0)
itx - plot the calculated travel time-distance values as lines
(1), symbols of height symht (2), symbols of height symht
interpolated at the observed receiver locations contained in
the file tx.in (invr=1 must be used, if not, itx=2 is used) (3);
or as residuals measured from the oberved data in tx.in (invr=1
must be used) (4); no calculated travel times are plotted if itx=0
(default: 1)
itxbox - plot only those calculated and observed travel times that
have distances between xmint and xmaxt and times between tmin
and tmax (default: 0)
idata - plot the observed travel time picks from the file tx.in
(1 or -1), or plot only those picks used in the inversion if invr=1
(2 or -2); the observed data are represented by vertical bars with
a height of twice the corresponding uncertainty specified in the
file tx.in if idata>0, or by symbols of height symht if idata<0
(default: 0)
isep - plot the model and rays and travel times in the same plot
frame (0), separate plot frames (1), plot the model and rays and
travel times in a separate plot frame for each shot (2), or plot
the model and rays in separate plot frames for each shot followed
by the travel times in separate plot frames for each shot (3)
(default: 0)
Note: the value of isep may be changed during a program run with
entry from the keyboard of the values 0, 1, 2 or 3 between
plot frames when a <CR> is needed to continue; entering "s"
will terminate the program run
ibreak - an array corresponding to the ray groups listed in the
array ray to split travel time-distance curves into prograde
and retrograde segments when plotting with itx=1, and to increment
the integer code by one in the file tx.out when changing from a
prograde to retrograde segment or vice versa if itxout=1
(default: 1)
iszero - plot the calculated and observed travel times as if all
shot points were at 0 km and the rays travelled left to right
(default: 0)
itxout - write the calculated travel time-distance pairs to the
file tx.out; the integer code identifying each pick is
determined by the array ibreak if itxout=1 or the array ivray
if itxout=2 or 3; if itxout=3, the calculated travel times are
interpolated to the observed receiver locations (invr=1 must be
used if itxout=3, if not, itxout=2 is used) (default: 0)
Note: there appears to be a bug with itxout, itx=itxout may be
necessary for correct results
idump - write detailed velocity model and ray tracing
information to the file r2.out and the namelist parameter
values to the file n.out; mainly for debugging (default: 0)
Note: using idump=1 will greatly slow down the run time
isum - write a short summary about the rays traced and the
velocity model to the screen (1), also write the travel time
residuals and chi-squared values for each phase and shot to the
file r1.out (2), and to the screen (3) (must use invr=1 for
isum>1) (default: 1)
istep - pause after each ray is plotted writing its take-off angle
to the screen and waiting until a <CR> is entered before
plotting the next ray; this is mainly intended to be used in
conjunction with irays=1 to determine the cause of the
failure of the search mode for a particular ray group;
entering "s" after any ray will terminate the program run
(default: 0)
symht - height of symbols (mm) used when plotting each point
defining a ray path, single point travel time curves (if
symht=0, single point travel time curves will not be plotted),
the calculated travel times if itx=2, or the observed travel
times if idata<0 (default: 0.5)
velht - the maximum height of the velocity values (mm) when
ivel=1 or -1 is equal to velht*albht (default: 0.7)
nskip - the first nskip points (step lengths) of all ray paths are
not plotted (default: 0)
nrskip - plot every nrskip ray traced (default: 1)
npskip - plot every npskip point of each ray traced (default: 1)
vred - reducing velocity (km/s) of travel time-distance plot;
observed data in the file tx.in is assumed to be unreduced (a
value of zero is permitted for no reduction; vred must be less
than 10) (default: 8)
xwndow, ywndow - the horizontal and vertical size of the graphics
window (mm) that will over-ride a window size specified in an
"mx11.opt" or ".Xdefaults" file; the maximum allowable values
(to use the entire screen) are 350 and 265 mm, respectively
(defaults: if xwndow or ywndow is less than or equal to zero,
the size of the window specified in the "mx11.opt" or ".Xdefaults"
file is used)
Note: the effect of these parameters will depend on the local
graphics system and machine type
dvmax, dsmax - a warning message is written to the screen and the
to file r1.out indicating the layers in which the magnitude of
the velocity gradient vector is greater than dvmax (km/s/km) and the
layer boundaries having a change in slope across three successive
points of greater than dsmax (degrees) (defaults: infinite, infinite)
ibcol, ifcol - background and foreground colours (defaults: 0, 1)
mcol - an array specifying the colours of the model: the layer
boundaries are mcol(1), the vertical boundaries are mcol(2),
the floating reflectors are mcol(3), the smooth layer boundaries
are mcol(4), and the velocity values are mcol(5)
(default: 1, 1, 1, 1, 1)
ircol - colour the ray paths according to the value of ivray for that
particular ray group (1), according to the shot number (2), or
according to the ray group (3) (default: 0)
itcol - colour the observed travel times according to the integer
code identifying each pick in the file tx.in (the 4th column) (1),
or according to the shot number (2); if itcol=3, the observed
travel times are coloured as if itcol=1 and the calculated travel
times are coloured according to ray group (invr=1 must be used)
(default: 0)
title - title for plot (up to 80 characters long) positioned using
xtitle and ytitle (default: none)
xtitle, ytitle - x and y position (mm) of the plot title (default: 0, 0)
colour - an array specifying the colours of the ray paths if ircol>0
and the observed travel times if itcol>0
(default: 2,3,4,5,6,8,17,27,22,7)