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Hi, Frank —
<div>You can’t concatenate grib1 ensemble files and expect gribmap to distinguish between them — there isn’t any ensemble metadata in a grib1 header. This is discussed in the documentation for ensembles under ‘how to organize your data’:
<a href="http://cola.gmu.edu/grads/gadoc/ensembles.html#data">http://cola.gmu.edu/grads/gadoc/ensembles.html#data</a>. For GFS ensembles, I use a descriptor file like this:</div>
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<div><font face="Courier" style="font-size: 14px;">dset ^gfsens.%e.%iy4%im2%id2%ih2.fh%f3.grib2</font></div>
<div><font face="Courier" style="font-size: 14px;">dtype grib2</font></div>
<div><font face="Courier" style="font-size: 14px;">title NCEP 5D Ensemble Forecast Initialized 00z08jul2016 6-hourly out to 192 hours</font></div>
<div><font face="Courier" style="font-size: 14px;">index ^gfsens.2016070800.map</font></div>
<div><font face="Courier" style="font-size: 14px;">options template pascals</font></div>
<div><font face="Courier" style="font-size: 14px;">undef -9.99e33</font></div>
<div><font face="Courier" style="font-size: 14px;">xdef 360 linear 0.0 1.0</font></div>
<div><font face="Courier" style="font-size: 14px;">ydef 181 linear -90.0 1.0</font></div>
<div><font face="Courier" style="font-size: 14px;">zdef 10 levels 100000 92500 85000 70000 50000 25000 20000 10000 5000 1000</font></div>
<div><font face="Courier" style="font-size: 14px;">tdef 33 linear 00z08jul2016 6hr</font></div>
<div><font face="Courier" style="font-size: 14px;">edef 22</font></div>
<div><font face="Courier" style="font-size: 14px;">*name length initialtime <type,pert or deriv></font></div>
<div><font face="Courier" style="font-size: 14px;">avg 33 00z08jul2016 0</font></div>
<div><font face="Courier" style="font-size: 14px;">c00 33 00z08jul2016 1,0</font></div>
<div><font face="Courier" style="font-size: 14px;">p01 33 00z08jul2016 3,1</font></div>
<div><font face="Courier" style="font-size: 14px;">p02 33 00z08jul2016 3,2</font></div>
<div><font face="Courier" style="font-size: 14px;">p03 33 00z08jul2016 3,3</font></div>
<div><font face="Courier" style="font-size: 14px;">p04 33 00z08jul2016 3,4</font></div>
<div><font face="Courier" style="font-size: 14px;">p05 33 00z08jul2016 3,5</font></div>
<div><font face="Courier" style="font-size: 14px;">p06 33 00z08jul2016 3,6</font></div>
<div><font face="Courier" style="font-size: 14px;">p07 33 00z08jul2016 3,7</font></div>
<div><font face="Courier" style="font-size: 14px;">p08 33 00z08jul2016 3,8</font></div>
<div><font face="Courier" style="font-size: 14px;">p09 33 00z08jul2016 3,9</font></div>
<div><font face="Courier" style="font-size: 14px;">p10 33 00z08jul2016 3,10</font></div>
<div><font face="Courier" style="font-size: 14px;">p11 33 00z08jul2016 3,11</font></div>
<div><font face="Courier" style="font-size: 14px;">p12 33 00z08jul2016 3,12</font></div>
<div><font face="Courier" style="font-size: 14px;">p13 33 00z08jul2016 3,13</font></div>
<div><font face="Courier" style="font-size: 14px;">p14 33 00z08jul2016 3,14</font></div>
<div><font face="Courier" style="font-size: 14px;">p15 33 00z08jul2016 3,15</font></div>
<div><font face="Courier" style="font-size: 14px;">p16 33 00z08jul2016 3,16</font></div>
<div><font face="Courier" style="font-size: 14px;">p17 33 00z08jul2016 3,17</font></div>
<div><font face="Courier" style="font-size: 14px;">p18 33 00z08jul2016 3,18</font></div>
<div><font face="Courier" style="font-size: 14px;">p19 33 00z08jul2016 3,19</font></div>
<div><font face="Courier" style="font-size: 14px;">p20 33 00z08jul2016 3,20</font></div>
<div><font face="Courier" style="font-size: 14px;">endedef</font></div>
<div><font face="Courier" style="font-size: 14px;">vars</font></div>
<div><font face="Courier" style="font-size: 14px;">....</font></div>
<div><font face="Courier" style="font-size: 14px;">endvars</font></div>
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<div>On Jul 7, 2016, at 5:21 PM, Frank Colby <<a href="mailto:Frank_Colby@uml.edu">Frank_Colby@uml.edu</a>> wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">Hi GradsUsers,<br>
<br>
Does anyone have an easy way to handle GFS Ensemble files? I have <br>
output from ensemble runs that have separate files for each ensemble <br>
member at each forecast hour. I would like to put the ensemble members <br>
together into a single file. I used cat to put two files together as a <br>
test, and wgrib (these are grib1 files) shows that both ensemble members <br>
are indeed there. However, when I use grib2ctl and gribmap to make the <br>
ctl and index files, and open the file, it only has the first ensemble <br>
member. It's as if grib2ctl never read that there was a second <br>
ensemble member.<br>
<br>
What am I missing here?<br>
<br>
Thanks,<br>
Frank Colby<br>
UMass Lowell<br>
<br>
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</blockquote>
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<div style="font-size: 12px; orphans: 2; widows: 2;">--</div>
<div style="font-size: 12px; orphans: 2; widows: 2;">Jennifer Miletta Adams<br>
Center for Ocean-Land-Atmosphere Studies (COLA)<br>
George Mason University<br>
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