<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><br></div><div><br></div><div><br></div><div><br><div><div>On Sep 12, 2013, at 12:15 PM, Sytske Kimball wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div>All,<br><br></div>Here is a demo script that Jennifer Adams wrote to display NEXRAD radar data in GrADS:<br><div><div><br> <a href="ftp://cola.gmu.edu/grads/scripts/shp_demo3.gs">ftp://cola.gmu.edu/grads/scripts/shp_demo3.gs</a><br>
<br></div><div>It uses a descriptor file called radar.ctl and it appears that the radar data is in netCDF format. </div></div></div></blockquote><br><div>The radar data in that example script is from a gridded radar mosaic product that we acquire in real time via the LDM (the FNEXRAD feed). It is in grib2 format and has a high resolution (~1km). I do not know of another source for this data. It is handled by GrADS like any other grib2 file. The descriptor (/data/grib2/radar/radar.ctl) looks like this:<div><br></div><div><div>dset ^1002061200.mosaic </div><div>index ^radar.map</div><div>undef 9.999E+20</div><div>title high res radar mosaic</div><div>dtype grib2</div><div>pdef 4800 3000 lcc 23.500000 240.000000 1 1 40.000000 40.000000 260.000000 998.958000 998.333000</div><div>xdef 6613 linear -129.065098 0.00990277149502644</div><div>ydef 3309 linear 22.217921 0.00907575454545454</div><div>zdef 1 linear 1 1</div><div>tdef 1 linear 11:58z6feb2010 1mn</div><div>vars 1</div><div>base 0,1,0 0,15,1 ** surface none Base Reflectivity [dB]</div><div>ENDVARS</div></div><div><br></div></div><br><blockquote type="cite"><div dir="ltr"><div><div>NEXRAD data can be converted to netCDF using the NOAA Weather and Climate Toolkit, but how does one obtain a descriptor file for netCDF data??<br></div></div></div></blockquote><br>If you can acquire NEXRAD data in netcdf format from some other source, and you want to display it with GrADS, then you should read the documentation at <a href="http://iges.org/grads/gadoc/SDFdescriptorfile.html">http://iges.org/grads/gadoc/SDFdescriptorfile.html</a>. If you are still having trouble, then post the descriptor file you have created, the full text of the GrADS session that is failing, and the output from ncdump -c on your data file.</div><div>--Jennifer</div><div><br></div><div><br><blockquote type="cite"><div dir="ltr"><div><div>
<br></div><div>Thanks,<br>Sytske<br clear="all"></div><div><div><div dir="ltr"><div><br><br><br>Sytske (seets-kah) Kimball<br>Professor of Meteorology</div>
<div>Director, South Alabama Mesonet<br>Dept. of Earth Sciences<br>University of South Alabama<br>Mobile, AL<br>phone (251) 460-7031 </div>
<div>fax (251) 460-7886<br>email <a href="mailto:skimball@usouthal.edu" target="_blank">skimball@southalabama.edu</a></div>
<div>web: <a href="http://chiliweb.southalabama.edu/" target="_blank">http://chiliweb.southalabama.edu/</a><div style="width:16px;height:16px;display:inline-block"> </div></div></div></div>
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<span class="Apple-style-span" style="font-size: 12px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>--</div><div>Jennifer M. Adams<br>Center for Ocean-Land-Atmosphere Studies (COLA)<br>111 Research Hall, Mail Stop 2B3<br>George Mason University<br>4400 University Drive<br>Fairfax, VA 22030 <br><br></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span></span></div></span><br class="Apple-interchange-newline">
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