<div dir="ltr"><div>Jennifer,<br><br>Thank you for your response. So far I've had no luck identifying other netCDF sources for NEXRAD data. But I'll follow up when/if I do.<br><br></div>Sytske<br><br><br></div><div class="gmail_extra">
<br clear="all"><div><div dir="ltr"><div>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>
<br><br><div class="gmail_quote">On Thu, Sep 12, 2013 at 11:55 AM, Jennifer Adams <span dir="ltr"><<a href="mailto:jma@cola.iges.org" target="_blank">jma@cola.iges.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word"><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><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" target="_blank">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" target="_blank">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;min-height:16px;display:inline-block"> </div></div></div></div>
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--</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></div><br>
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