[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

20040831: Level 2 radar

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: 20040831: Level 2 radar
  • Date: Tue, 07 Sep 2004 13:05:21 -0600
Jimmy,

The color bar levels are determined from the data itself and
the number of levels specified in the $GEMTBL/sat/imgtyp.tbl file
with the associated color table that the user selects.

That is, the number of colors in the color table, and the data range
will determine the values of the color bar labels. More color
values, more labels. The default color table in imgtyp.tbl for
spectrum width is the same as the veolocity plot, eg 
$GEMTBL/luts/upc_velimg.tbl.
This could be cahnged to a different table with more or less colors (up to 95
colors generally for the default ntl invocation) which will effect the number
of label values in the bar.

I have added the processing of the "frequency" attribute in IMCBAR
for GEMPAK 5.7.3 to control the number of labels so that the color bar 
legend can be configured by the user as needed. 

There is no direct way to specify a range value for the data levels to be 
plotted.

Steve Chiswell
Unidata User SUpport




>From: address@hidden
>Organization: UCAR/Unidata
>Keywords: 200408311558.i7VFwY8E007881

>Hi-
>I was wondering if we could control the reflectivity, radial velocity and 
>spectrum width increments used in gpnexr2. Standard velocity intervals of 
>3 m/s are used for spectrum width but spectrum width is typically less 
>than 10m/s. Do we specify this through the use of the lookup table?
>Thanks.
>
>-- 
>James Correia Jr.
>Ph.D. Candidate in Agricultural Meteorology
>President (Dictator) of the ISU Graduate Meteorology Club
>Dept. of Agronomy, Iowa State University
>*********************************************
>Email: address@hidden
>Phone: 515-294-5587
>Web: http://www.mesoscale.iastate.edu/jimmyc/
>ISU GMC: http://www.stuorg.iastate.edu/gmc/
>*********************************************
>"There is a difference between knowing the path and walking the path"
>-"Morpheus"
>
>"Scientific theories are built to be used, but they must be mistrusted, 
>tested and improved."
>-Balik and Frank 
>
--
NOTE: All email exchanges with Unidata User Support are recorded in the
Unidata inquiry tracking system and then made publicly available
through the web.  If you do not want to have your interactions made
available in this way, you must let us know in each email you send to us.