GEMPAK Manual |
Programs
NEXR2RHI displays NEXRAD level II vertical cross sections.
INPUT PARAMETERS
CXSTNS Cross-section station line
GVCORD Grid vertical coordinate
PTYPE Plot type/h:w ratio/margins
YAXIS Ystrt/ystop/yinc/lbl;gln;tck
CINT Contour interval/min/max
SCALE Scalar scale / vector scale
LINE Color/type/width/label/smth/fltr
BORDER Background color/type/width
TITLE Title color/line/title
CLEAR Clear screen flag
DEVICE Device|name|x size;y size|color type
TEXT Size/fnt/wdth/brdr/N-rot/just/hw flg
PANEL Panel loc/color/dash/width/regn
CLRBAR Color/ornt/anch/x;y/ln;wd/freq|text_info
CONTUR Subbox/smooth
FINT Fill interval/min/max
FLINE Fill colors/fill types
CTYPE Contour type: C/F
RADFIL Radar image filename(s)
RADTIM Radar composite current/dattim
RADPARM Radar parameter (dz, vr, sw)
INTERP Interpolation flag
PROGRAM DESCRIPTION
NEXR2RHI displays NEXRAD Level II vertical cross sections for
data in ARCHIVE2 format. This program is adopted from GDCROSS to
create a volume rendering of NEXRAD data along a specified
axis.
RADFIL specifies the input Level II file. A template may be
specified, with an optional site name (eg NEXRII|KDDC).
If a site name is provided, it will be used to replace the %SITE%
alias in the template name. The NEXRII template is provided
for ARCHIVE2 format files.
RADPARM is the Radar parameter to be displayed. Valid values are
dz (reflectivity), vr (radial velocity), sw (spectrum width).
RADTIM is a valid GEMPAK date/time string or abbreviation. A time
range may be specified.
INTERP is a logical variable which determines whether interpolation
between sweeps will occur.
CXSTNS is the cross section axis (as in GDCROSS). A grid coordinate
can be used with row and colums 1 to 920.
GVCORD is the vertical coordinate of the radar data (always HGHT).
PTYPE is the plot type. A value of "LIN" is generally the only
useful setting.
Other parameters as in GDCROSS.
EXAMPLES
1. Display an East-West RHI which passes through the radar location
for reflectivity data from KLVX. Display the RHI from 0 to 20KM
using color filled contours. Use a contour interval of 4 dBZ
with a minimum value of -12 dBZ. Grid point 460;460 is the radar center.
Interpolate contours between beam scans.
CXSTNS = @1;460>@920;460
GVCORD = hght
PTYPE = lin
YAXIS = 0/20000
CINT = 0
SCALE = 0
LINE = 1
BORDER = 1
TITLE = 1/-2/RHI Base Reflectivity Level II ^
CLEAR = YES
DEVICE = xw
TEXT = .8/1/1/111/hw
PANEL = 0
CLRBAR = 1
CONTUR = 3/2
FINT = 4
FLINE = 0;30-7
CTYPE = f
RADFIL = NEXRII|KLVX
RADPARM = dz
RADTIM = last
INTERP = y
2. Display a cross section of radial velocity from 38.6N;86.8W to
37.4N;84.8W. Plot filled contours at 4 m/s intervals. Display data
from 0 to 20km. Allow interpolation between beam scans. Use
line countours, with negative values contoured by a dotted line,
positive values contoured with a solid line.
CXSTNS = 38.6;-86.8>37.4;-84.8
GVCORD = hght
PTYPE = lin
YAXIS = 0/20000
CINT = 4
SCALE = 0
LINE = 5/-10
BORDER = 1
TITLE = 1/-2/RHI Radial Velocity Level II ^
CLEAR = YES
DEVICE = xw
TEXT = .8/1/1/111/hw
PANEL = 0
CLRBAR =
CONTUR = 3/2
FINT =
FLINE =
CTYPE = c
RADFIL = NEXRII|KLVX
RADPARM = vr
RADTIM = last
INTERP = y
ERROR MESSAGES
[NEXR2RHI -1] Fatal error initializing TAE.
[NEXR2RHI -2] Fatal error reading TAE parameters.
[NEXR2RHI -3] Fatal error initializing GEMPLT.