PLOTFIELD produces either rectangular or polar plots of shade files. The former are used for range-depth plots of transmission loss (slices in a vertical plane) and the latter for range-range plots of transmission loss (slices of in a horizontal plane).
Files:
Name Unit Description
Input
*.PLP 1 PLot Parameters
Output
*.SHD 11-99 SHaDe file
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EXAMPLE AND DESCRIPTION OF PLP FILE:
'RD' ! 'S' SCALE, 'L' OR 'D' LINEAR OR DB
'CA' ! POLAR OR CARTESIAN ('PO', 'CA')
'VUGC' ! DEVICE ('PRX', 'TEK', 'TEK', 'T41')
0 ! Segment number (0 for none)
0.0 ! SMOOTHING WINDOW (m)
1 ! NPLOTS
'SCR:DEEPB' 100.0 ! SOURCE DEPTH
0.0 50.0 0.0 5000.0 ! RMINPL RMAXPL (km) ZMIN ZMAX (m)
66.0 102.0 4.0 ! TLmin TLmax (dB)
(1) - SCALING
Syntax:
OPT
Description:
OPT(1:1): Source type.
'R' No scaling applied.
'S' Field multiplied by sqrt(r).
OPT(2:2): Linear or dB
'L' Linear scale (useful for pulse plots).
'D' dB scale (for most other plots).
(2) - COORDINATE SYSTEM:
Syntax:
COORD
Description:
COORD(1:2): Source type.
'CA' Cartesian.
'PO' Polar.
COORD(3:3): Grid plotting.
'G' Grid.
' ' No grid.
(3) - OUTPUT DEVICE:
Syntax:
DEVICE
Description:
DEVICE(1:3): Device type.
'VUG' Vugraph machine.
'TEK' Tektronix 4691 hardcopy device.
'THE' Tektronix 4693 hardcopy device.
'VUG' Tektronix VUGRAPH hardcopy device.
'T41' Tektronix 41xx terminal.
'VTT' DEC VT340 terminal.
'MGP' VAXstation 2000.
'X11' X-windows device.
'PSP' PostScript printer.
DEVICE(4:4): Color or black and white
'C' Color
'B' Black and white
DEVICE(5:5): Smooth (linear interp.) or blocky shading.
'S' Smooth.
'B' Blocky.
DEVICE(6:6): Final copy.
'F' Final
' ' Standard labels
This option labels the plots (a), (b), (c)
and strips out certain other information to
make the plot suitable for a final report.
(4) - SEGMENT NUMBER:
Syntax:
SEGNUM
Description:
SEGNUM: If you specify a nonzero segment number, then
the file will be added into the default segment
file. (See UNIRAS documentation for info on
segment files).
(5) - SMOOTHING WINDOW
Syntax:
DR3DB
Description:
DR3DB: Three dB smoothing window (m). The tranmission
loss is computed then smoothed in range using a
Gaussian filter. DR3DB gives the range interval
over which the smoothing is performed.
(6) - NUMBER OF PLOTS
Syntax:
NPLOTS
Description:
NPLOTS: You can do 1,2 or 3 plots per page as indicated
by NPLOTS.
(7) - PLOT DATA:
Syntax:
FILNAM SD
RMIN RMAX RINC RAXL TITLER
ZMIN ZMAX ZINC ZAXL TITLEZ
TLMIN TLMAX TLINC
Description:
FILNAM: Name of the shade file.
The file name is provided without the
extension which is assumed to be '.SHD'.
SD: Source depth.
RMIN: Minimum range (km ).
RMAX: Maximum range (km ).
RINC: Range interval for tick marks (m/s).
RAXL: Range axis length (cm ).
TITLER: Axis title (in quotes)
ZMIN: Minimum depth (m).
ZMAX: Maximum depth (m).
ZINC: Depth interval for tick marks (m/s).
ZAXL: Depth axis length (cm).
TITLEZ: Axis title (in quotes)
TLMIN: Minimum transmission loss (dB).
TLMAX: Maximum transmission loss (dB).
TLINC: Increment in transmission loss (dB).
TITLE: Axis title (in quotes)
This information should be repeated for ISRC = 1, NSRCS
For a polar plot the form is:
Syntax:
FILNAM SD
XMIN XMAX XINC XAXL
YMIN YMAX YINC YAXL
TLMIN TLMAX TLINC
where XMIN, XMAX, YMIN, YMAX, specify the x and y limits of
the plot in kilometers.
Figure: Sample output of PLOTFIELD: transmission loss for the Arctic problem.