<b>I am having a MODIS satellite data for Indian region in HDF format. As Moctar have suggested I have tried to plot my hdf Modis data directly by using gradshdf. For that I have written a Data descriptor file like this ..
</b><br><br>DSET ^MAM07S0.A2007003.1725.002.2007004212828.hdf<br>TITLE This is only a test<br>DTYPE HDFSDS<br>*OPTIONS YREV<br>UNDEF -32768<br>XDEF XDim:mod07 406 LINEAR 60 0.1<br>YDEF YDim:mod07 41 LINEAR 0 0.1<br>*TDEF TIME4DIMS:DAOgrid 1 LINEAR 0Z31JUL1993 6HR
<br>VARS 1<br>Lifted Index=>LI 1 99 Li<br>ENDVARS<br><br> <b> I want to plot the parameter named Lifted Index, using grads for the satellite pass.<br>But by running the DDF I was disappointed. It is not working. The message was could not ingest SDF file. The out put from grads is as following.....
</b><br><br>jkpr@jkpr-desktop:~/Desktop$ gradshdf<br><br>Grid Analysis and Display System (GrADS) Version 1.9b4<br>Copyright (c) 1988-2005 by Brian Doty and IGES <br>Center for Ocean-Land-Atmosphere Studies (COLA)<br>Institute for Global Environment and Society (IGES)
<br>GrADS comes with ABSOLUTELY NO WARRANTY<br>See file COPYRIGHT for more information<br><br>Config: v1.9b4 32-bit little-endian readline sdf/xdf hdf-sds netcdf lats athena printim<br><br>Issue 'q config' command for more information.
<br><br>Landscape mode? (no for portrait): <br>GX Package Initialization: Size = 11 8.5 <br><br>ga-> open MOD08_M3.005.timeAverage<br>Scanning description file: MOD08_M3.005.timeAverage<br>Open Error: Missing or invalid dimension size.
<br> --> The invalid description file record is: <br> --> XDEF XDim:mod07 406 LINEAR 60 0.1<br><br> The data file was not opened. <br>ga-> <br><br><br><b>I am herewith attaches the hdf file for which I want to plot the data. Can anyone help me to write a data descriptor file which will be suitable for plotting the Lifted Index, Total Totals Index, K Index, etc, using the HDF data ??. My ultimate aim is to plot these parameters using gradshdf. Any help in this regard is much appreciated.
</b><br> <br>Awaiting your most valuable responses <br>Jayakrishnan.P.R<br><br><br><br><br><br><br><br><div class="gmail_quote">On Nov 30, 2007 9:09 PM, Jayakrishnan PR <<a href="mailto:prjayakrishnan@gmail.com">prjayakrishnan@gmail.com
</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Thanks a lot. It worked. Now I have to check this with my data. I hope it will also work.
<div><div></div><div class="Wj3C7c"><br><br><div class="gmail_quote">On Nov 30, 2007 8:43 PM, moctar Camara <<a href="mailto:moctar.camara@yahoo.fr" target="_blank">moctar.camara@yahoo.fr
</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">HI,<br>I succed in plotting modis aerosol hdf data using grads. I just write a descriptor file and it was
ok.To write the descriptor file, you will need to use ncdump for hdf to know the structure of your data. I've attached a descriptor file and an hdf file as an example.<br>Hope it helps<br><br>Moctar<br><br><b><i>Jayakrishnan PR <
<a href="mailto:prjayakrishnan@GMAIL.COM" target="_blank">prjayakrishnan@GMAIL.COM</a>></i></b> a écrit :<div><div></div><div><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;">
Dear All,<br> I am now working in MODIS satellite data. The data is in HDF-SDS<br>format. I want to plot the data using grads, directly. Now I cannot plot the<br>data using gradshdf. I dont know the reason. I converted that data into
<br>ascii and then I converted it into staion data, and using station grads I<br>have plotted the data. Now I can plot the colored map of each satellite pass<br>using station data.<br> I am working in Linux platform ( ubuntu
6.1
version) with grads 1.9b4.<br><br><br> Now my question is that can I plot the same data which is in hdf<br>format, directly in gradshdf..?. I have tried it but it dont worked. If it<br>is possible it will be a great thing for me because I can skip converting
<br>into ascii, and then station format and plotting. I have heard the COARDS<br>convention for hdf data..? Is MODIS data following COARDS convention..?<br> Any help is much appreciated....!!!!<br> looking forward
<br> Jayakrishnan.P.R<br> Junior Research Fellow<br> Department of Atmospheric Sciences<br> Cochin University of Science And Technology (CUSAT),
<br><br> Cochin-16, Kerala, India<br></blockquote><br></div></div><div><p>
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<br><br clear="all"><br></div></div>-- <br>***********************************************<div class="Ih2E3d"><br>Jayakrishnan.P.R<br>Junior Research Fellow<br>Department of Atmospheric Sciences<br>Cochin University of Science And Technology (CUSAT), Cochin-16
<br></div>Kerala, India.<br>Mob: 09895417565<br><br>***********************************************
</blockquote></div><br><br clear="all"><br>-- <br>***********************************************<br>Jayakrishnan.P.R<br>Junior Research Fellow<br>Department of Atmospheric Sciences<br>Cochin University of Science And Technology (CUSAT), Cochin-16
<br>Kerala, India.<br>Mob: 09895417565<br><br>***********************************************