<div dir="ltr"><div>Tamara,</div><div><br></div><div>For preprojected GrADS grids, xdef and ydef define a latlon grid. The</div><div>domain and grid spacing are arbitrary. For really old versions of <a href="http://grib2ctl.pl">grib2ctl.pl</a></div><div><br></div><div>1. grid spacing is related to the input grid spacing</div><div>2. domain is a balance between maximizing area and minimizing</div><div> number of points that outside of the original grid and have undefined values.</div><div><br></div><div>For old versions of <a href="http://grib2ctl.pl">grib2ctl.pl</a></div><div><br></div><div>1. grid spacing is related to the input grid spacing (I don't think I changed it)</div><div>2. I increased the size of the domain at the expense of more undefined grid points.</div><div><br></div><div>The calculations for "2" are very crude and it was assumed that people could</div><div>change the xdef and ydef to their own liking.</div><div><br></div><div>As for new versions of <a href="http://grib2ctl.pl">grib2ctl.pl</a>, there aren't any. NCEP hit the limitations of</div><div>grib1 years ago. I find grib2 easier to use and grib3 is being proposed.<br></div><div><br></div><div>Issue 2.</div><div><br></div><div>The newer version used "pdef lccr" and the older version used "pdef lcc". The</div><div>lccr keyword tells GrADS that the input winds are grid relative and need to be rotated</div><div>to earth relative. <br></div><div><br></div><div>Wesley<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jul 3, 2018 at 12:31 AM, Krishnakumar AP <span dir="ltr"><<a href="mailto:krishnaap7@gmail.com" target="_blank">krishnaap7@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Hi Tamara,<br><br></div>I believe your ydef initial point is different, please check these values on both files.<br><br>ydef 1249 linear -54.387000 0.0363636363636364 <br>--------------------------^<br><br></div>This is what I understood from both ctl files.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jul 2, 2018 at 11:14 PM, tschonholz <span dir="ltr"><<a href="mailto:tschonholz@smn.gov.ar" target="_blank">tschonholz@smn.gov.ar</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p>Hi everyone! I´m posting this message because I´m finding a hard time using grib2ctl </p>
<p>I use this bash to generate my ctl and idx on a server, but the original ctl and idx are generated on different server than mine.</p>
<p> </p>
<p>#!/bin/sh<br>#*****Script para procesar el analisis</p>
<p>today=$(date +%Y%m%d)</p>
<p>echo ${today}</p>
<p>#chequeo que exista la salida del WRF</p>
<p>if [ -d /nas-r5c/WRF/${today}_00/ ];<br>then <br>#si ocurre, genero el ctl<br>echo ***Proceso las salidas grib del modelo**<br>cd /home/mgatto/<br>#rm /home/mgatto/modelos/WRF/data/<wbr>gribwrf.ctl<br>perl <a href="http://grib2ctl.pl" target="_blank">grib2ctl.pl</a> -verf /nas-r5c/WRF/${today}_00/UPPOU<wbr>T/wrfprs_d01.%f3 /home/mgatto/modelos/WRF/data/<wbr>indexwrf00.idx >/home/mgatto/modelos/WRF/data<wbr>/gribwrf00.ctl<br>gribmap -i /home/mgatto/modelos/WRF/data/<wbr>gribwrf00.ctl</p>
<p>else<br>exit</p>
<p>fi</p>
<div>-- <br>
<p>doing this, i get this ctl:</p>
<p>dset /nas-r5c/WRF/20180702_00/UPPOU<wbr>T/wrfprs_d01.%f3<br>index /home/mgatto/modelos/WRF/data/<wbr>indexwrf00.idx<br>undef 9.999E+20<br>title /nas-r5c/WRF/20180702_00/UPPOU<wbr>T/wrfprs_d01.000<br>* produced by grib2ctl v0.9.13<br>* command line options: -verf /nas-r5c/WRF/20180702_00/UPPOU<wbr>T/wrfprs_d01.%f3 /home/mgatto/modelos/WRF/data/<wbr>indexwrf00.idx<br>dtype grib 255<br>options template<br>pdef 999 1249 lccr -54.387000 -94.331000 1 1 -35.000000 -35.000000 -65.000000 4000 4000<br>xdef 999 linear -94.331000 0.0624474869364198<br>ydef 1249 linear -54.387000 0.0363636363636364<br>tdef 49 linear 00Z02jul2018 1hr<br>* z has 28 levels, for prs<br>zdef 28 levels<br>1000 975 950 925 900 875 850 825 800 775 750 700 650 600 550 500 450 400 350 300 275 250 225 200 175 150 100 50<br>vars 130</p>
<p> </p>
<p>and all the variables.</p>
<p>The problem is that the original ctl says this:</p>
<p>dset ^wrfprs_d01.%f3<br>index ^wrfprs_d01.idx<br>options template<br>undef 9.999E+20<br>title wrfprs_d01.00<br>* produced by grib2ctl v0.9.12.5p45<br>dtype grib 255<br>pdef 999 1249 lcc -54.387000 -94.331000 1 1 -35.000000 -35.000000 -65.000000 4000 4000<br>xdef 999 linear -94.331000 0.0624474869364198<br>ydef 1249 linear -56.853000 0.0363636363636364<br>tdef 49 linear 00Z02Jul2018 1hr<br>* z has 28 levels, for prs<br>zdef 28 levels<br>1000 975 950 925 900 875 850 825 800 775 750 700 650 600 550 500 450 400 350 300 275 250 225 200 175 150 100 50<br>vars 130</p>
<p> </p>
<p>which means that I lose the south of my area because I don´t know why it's not doing the same than the original.</p>
<p>I believe it has to do with my grib2ctl version, does anyone know what happens or could help me please?</p>
<p>Thanks a lot!</p>
<p>Tamara Schonholz- Servicio Meteorologico Nacional-Argentina</p>
</div>
</div>
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<br></blockquote></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><br>-- <br><div class="m_-633177313460553961gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><br></div><div>Best regards<br>Krishnakumar.AP<br> </div></div></div></div></div>
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