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This is an SSL issue. I can open that NASA URL with an ssl-enabled build of grads on my RHEL6 box with openssl version 1.0.1, but not on my RHEL5 box with openssl version 0.9.8. So, it seems to require a newer version of openssl that is not in my latest builds.
I am working on getting this sorted out and will be putting out a new release soon. In the meanwhile, you can use our GDS to look at TRMM data:
<div><a href="http://www.monsoondata.org:9090/dods/trmm/3B42">http://www.monsoondata.org:9090/dods/trmm/3B42</a></div>
<div><a href="http://www.monsoondata.org:9090/dods/trmm/3B43">http://www.monsoondata.org:9090/dods/trmm/3B43</a><br>
<div>—Jennifer</div>
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<div>On Feb 6, 2017, at 1:34 PM, Yen-Heng Lin <yheng@pie.com.tw> wrote:</div>
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<blockquote type="cite">Dear all,<br>
<br>
I used to sdfopen TRMM opendap data from NASA website https://disc2.gesdisc.eosdis.nasa.gov/opendap/<br>
After TRMM update the netcdf file to netcdf-4, I can't sdfopen the files now. The error message is:<br>
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--<br>
Error: nc_open failed to open file https://disc2.gesdisc.eosdis.nasa.gov:443/opendap/TRMM_L3/TRMM_3B42_Daily.7/2002/05/3B42_Daily.20020504.7.nc4<br>
NetCDF: I/O failure<br>
gadsdf: Couldn't ingest SDF metadata.<br>
--<br>
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I know I can download the file and write a control file, but it will us a lot of disk space.<br>
Does anyone have a solution about using sdfopen to open TRMM opendap data? <br>
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<br>
Thank you in advance<br>
Best Regards,<br>
Henry Lin<br>
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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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