<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">BTW, we have a FAQ on reading AIRS L3 data into GrADS:<div><br></div><div><a href="http://disc.sci.gsfc.nasa.gov/AIRS/additional/faq/faq.shtml#SC10">http://disc.sci.gsfc.nasa.gov/AIRS/additional/faq/faq.shtml#SC10</a></div><div><br><div><div>On Feb 1, 2013, at 2:16 PM, Lynnes, Christopher S. (GSFC-6102) wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Yes, the key to the sdfopen problem for AIRS data is that different variables have different lengths for the vertical dimension. You can only see variables for one vertical dimension using sdfopen (and I don't know how to select which dimension you get).<div><br></div><div>OTOH, it is possible to open a single variable from the AIRS via OPeNDAP with sdfopen by specifying an OPeNDAP "constraint", so long as you include the variables (e.g., H2OPrsLvlsU112, LatitudeU271,LongitudeU272) that make up the dimensions, e.g.:</div><div><br></div><div>sdfopen <a href="http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.01.01.L3.RetStd001.v5.2.2.0.G08066120251.hdf?RelHumid_AU46[0:1:11][0:1:179][0:1:359],H2OPrsLvlsU112[0:1:11],LatitudeU271[0:1:179],LongitudeU272[0:1:359]">http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.01.01.L3.RetStd001.v5.2.2.0.G08066120251.hdf?RelHumid_AU46[0:1:11][0:1:179][0:1:359],H2OPrsLvlsU112[0:1:11],LatitudeU271[0:1:179],LongitudeU272[0:1:359]</a></div><div><br></div><div>You could do this separately with each variable that you wanted to work with, but it is admittedly a bit unwieldy, unless you are scripting it.<br><div><br><div><div>On Feb 1, 2013, at 11:19 AM, Jennifer Adams wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">You will definitely need a descriptor file for this … either for xdfopen or open. The coordinate variables have non-standard names, and there are a lot of them: <div><br></div><div><div>netcdf AIRS.2008.06.30.L3.RetStd001.v5.2.2.0.G08184124505 {</div><div>dimensions:</div><div> CH4_LayersU115 = 3 ;</div><div> CH4_LayersU231 = 3 ;</div><div> CH4_LayersU250 = 3 ;</div><div> CH4_LayersU269 = 3 ;</div><div> CO_LayersU114 = 7 ;</div><div> CO_LayersU230 = 7 ;</div><div> CO_LayersU249 = 7 ;</div><div> CO_LayersU268 = 7 ;</div><div> CoarseCldLyrsU113 = 3 ;</div><div> CoarseCldLyrsU229 = 3 ;</div><div> CoarseCldLyrsU248 = 3 ;</div><div> CoarseCldLyrsU267 = 3 ;</div><div> EmisLvlsU116 = 4 ;</div><div> EmisLvlsU232 = 4 ;</div><div> H2OPrsLvlsU112 = 12 ;</div><div> H2OPrsLvlsU228 = 12 ;</div><div> H2OPrsLvlsU247 = 12 ;</div><div> H2OPrsLvlsU266 = 12 ;</div><div> LatitudeU271 = 180 ;</div><div> LongitudeU272 = 360 ;</div><div> MWEmisLvlsU251 = 3 ;</div><div> MWEmisLvlsU270 = 3 ;</div><div> TempPrsLvlsU111 = 24 ;</div><div> TempPrsLvlsU227 = 24 ;</div><div> TempPrsLvlsU246 = 24 ;</div><div> TempPrsLvlsU265 = 24 ;</div><div>variables:</div><div><br></div><div>If all those dimensions with the same size have different values, you'll need a separate descriptor for each set of coordinates. Variables that have the same coordinates can be grouped together in a single descriptor file. </div><div>--Jennifer</div><div><br></div><div><br></div><div><br></div><div><div>On Feb 1, 2013, at 10:43 AM, M.Mahakur wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Respected All,<br><br>I tried to access the L3 AIRX3STD v5 of AQUA/AIRS data using opendap:<br><br>sdfopen <a href="http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.01.01.L3.RetStd001.v5.2.2.0.G08066120251.hdf">http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.01.01.L3.RetStd001.v5.2.2.0.G08066120251.hdf</a><br><br>It opened with the error: SDF file has no discernable time coordinate -- using default values.<br><br>Hence it printed a wrong value for time (as below):<br><br>SDF file <a href="http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.06.30.L3.RetStd001.v5.2.2.0.G08184124505.hdf">http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.06.30.L3.RetStd001.v5.2.2.0.G08184124505.hdf</a> is open as file 1<br>LON set to 0 360 <br>LAT set to -89.5 89.5 <br>LEV set to 0 0 <br>Time values set: 1:1:1:0 1:1:1:0 <br>E set to 1 1 <br>ga-> q file<br>File 1 : <br> Descriptor: <a href="http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.06.30.L3.RetStd001.v5.2.2.0.G08184124505.hdf">http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.06.30.L3.RetStd001.v5.2.2.0.G08184124505.hdf</a><br> Binary: <a href="http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.06.30.L3.RetStd001.v5.2.2.0.G08184124505.hdf">http://acdisc.gsfc.nasa.gov/opendap/Aqua_AIRS_Level3/AIRX3STD.005//2008/AIRS.2008.06.30.L3.RetStd001.v5.2.2.0.G08184124505.hdf</a><br> Type = Gridded<br> Xsize = 360 Ysize = 180 Zsize = 24 Tsize = 1 Esize = 1<br> Number of Variables = 137<br><br>The major problem is it does not show all varibles. The no. of varibales are much larger than 137! I tried with opengrads also, the same problem.<br><br>How can I solve this? I am sure lot of users are using this data ..<br><br>Regards and Thanks,<br><br>Mahakur<br>_______________________________________________<br>gradsusr mailing list<br><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br><a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a><br></div></blockquote></div><br><div apple-content-edited="true">
<div style="font-family: Helvetica; font-size: 12px; ">--</div><div style="font-family: Helvetica; font-size: 12px; ">Jennifer M. Adams</div><div style="font-family: Helvetica; font-size: 12px; ">IGES/COLA</div><div style="font-family: Helvetica; font-size: 12px; ">4041 Powder Mill Road, Suite 302</div><div style="font-family: Helvetica; font-size: 12px; ">Calverton, MD 20705</div><div style="font-family: Helvetica; font-size: 12px; "><a href="mailto:jma@cola.iges.org">jma@cola.iges.org</a></div><div style="font-family: Helvetica; font-size: 12px; "><br class="khtml-block-placeholder"></div><span class="Apple-style-span" style="font-family: Helvetica; font-size: 12px; "><br class="Apple-interchange-newline"></span>
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<span class="Apple-style-span" style="border-collapse: separate; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; -webkit-text-decorations-in-effect: none; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="border-collapse: separate; color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-family: 'Times New Roman'; font-size: medium; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; "><div>--</div>Dr. Christopher Lynnes NASA/GSFC, Code 610.2 phone: 301-614-5185</div><div>"Perfection is achieved, not when there is nothing left to add, but when there is nothing left to take away" -- A. de Saint-Exupery<br><br></div><div style="border-collapse: separate; color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-family: 'Times New Roman'; font-size: medium; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; "><br></div></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
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<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div>--</div>Dr. Christopher Lynnes NASA/GSFC, Code 610.2 phone: 301-614-5185<br><br></span>
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