Great! thank you. I�ll let you know about my progress.<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><br>Bests,<br>
<br>Sandro<br><br><div class="gmail_quote">2011/7/14 James E. Johnson <span dir="ltr"><<a href="mailto:James.Johnson@nasa.gov" target="_blank">James.Johnson@nasa.gov</a>></span><div><div></div><div class="h5"><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">First, make sure you have a version of GrADS that supports reading HDF-EOS5 grid files (2.0.a7 or higher).<br>
Below is a sample GrADS control (.ctl) file that will let you read an OMI SO2 level-3 gridded HDF-EOS5 data file:<br>
<br>
DSET �OMI-Aura_L3-OMSO2e_2004m1001_v003-2011m0526t144250.he5<br>
DTYPE hdf5_grid<br>
TITLE OMI Level-3 Daily Lat/Lon 0.25deg Gridded Column Sulfur Dioxide Version 003 (OMSO2e.003)<br>
UNDEF -1.26765060e+30 _FillValue<br>
XDEF �1440 linear -180.0 0.25<br>
YDEF � 720 linear �-90.0 0.25<br>
ZDEF � � 1 levels 1<br>
TDEF � � 1 linear 01oct2004 1dy<br>
VARS � �14<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/ColumnAmountSO2_PBL=>so2pbl � � 0 �y,x �Vertical Column Amount SO2<br>
(Planetary Boundary Layer)<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/SlantColumnAmountSO2=>slantso2 �0 �y,x �Slant Column Amount SO2<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/Latitude=>lat � � � � � � � � � 0 �y,x �Geodetic Latitude<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/Longitude=>lon � � � � � � � � �0 �y,x �Geodetic Longitude<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/Time=>tai93 � � � � � � � � � � 0 �y,x �Time (seconds since January 1, 1993)<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/OrbitNumber=>orbit � � � � � � �0 �y,x �Orbit Number<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/LineNumber=>line � � � � � � � �0 �y,x �Line Number<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/SceneNumber=>scene � � � � � � �0 �y,x �Scene Number<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/ColumnAmountO3=>to3 � � � � � � 0 �y,x �Total Column Amount O3<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/RadiativeCloudFraction=>rcf � � 0 �y,x �Radiative Cloud Fraction<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/TerrainHeight=>theight � � � � �0 �y,x �Terrain Height<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/SolarZenithAngle=>sza � � � � � 0 �y,x �Solar Zenith Angle<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/RelativeAzimuthAngle=>raa � � � 0 �y,x �Relative Azimuth Angle<br>
/HDFEOS/GRIDS/OMI~Total~Column~Amount~SO2/Data~Fields/ViewingZenithAngle=>vza � � � � 0 �y,x �Viewing Zenith Angle<br>
ENDVARS<br>
<br>
<br>
Note the group paths to the data field variables must be specified in full, and any spaces converted to tilda (~) characters.<br>
<br>
You can rename the OMSO2e data files by removing the production date/time from the version (stuff after v003), then you would have<br>
a file name like OMI-Aura_L3-OMSO2e_2004m1001_v003.he5. With this you could modify the DSET (and add OPTIONS) to the .ctl file<br>
<br>
DSET �^OMI-Aura_L3-OMSO2e_%ym%m%d_v003.he5<br>
OPTIONS template<br>
<br>
and then you could read in multiple files for a range of dates (remember to also adjust the TDEF range).<br>
<div><br>
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