Hi Jason,

I am running ArcGIS 10.2. I am trying to use the MGET tool “Interpolate GHRSST L4 SST at Points” but am unable to retrieve data from NASA PODAAC. At first I was trying to do this with a retired/archived dataset JPL-L4UHfnd-GLOB-MUR (although I did not know it at the time). The error produced said it ‘failed to download the THREDDS catalog’, with SSLError ‘the read operation timed out’.

Error 1:

I took the following steps to resolve the issue:

1) Followed instructions in June 2017 help archive “How to access NASA ocean color data with ArcGIS 10.2.2 or earlier”

                (Used Python 2.7.13 "Windows x86 MSI Installer" to install appropriate version of Python27 in folder C:\Python27\ArcGIS10.2)

2) Followed instructions in November 2017 help archive “access to THREDDS catalog for L3 SST products”

                (Replaced original PODAAC.py file with the one provided)

I then reopened ArcMap, and again tried using the tool with dataset JPL-L4UHfnd-GLOB-MUR. This produced a different error which I thought indicated successful communication with the PODAAC database but that the data I wanted simply weren’t there.

Error 2:

This is when I did a search and found out the JPL-L4UHfnd-GLOB-MUR dataset had been retired. So, I tried again using the MUR-JPL-L4-GLOB-v4.1 dataset instead. Unfortunately, this produced an error very similar to Error 1, again stating that it failed to download the THREDDS catalog with SSLError ‘the read operation timed out’. (Which seems odd given the vaguely promising Error 2 and the fact that I had the new 2017 PODAAC.py file in place.)

Error 3:

Finally, in case the PODAAC address had changed, I tried replacing the appropriate https lines in the PODAAC.py code with the file structure found under the ‘Data Access’ tab at https://podaac.jpl.nasa.gov/dataset/MUR-JPL-L4-GLOB-v4.1, substituting the file ending to match the original (“catalog.xml”). [Changed 'https://opendap.jpl.nasa.gov/opendap/allData/ghrsst/data/GDS2/L4/catalog.xml' to ‘https://podaac-opendap.jpl.nasa.gov/opendap/allData/ghrsst/data/GDS2/L4/catalog.xml’]. Unfortunately this simply reproduced Error 3.

Do you have any thoughts on how to resolve this issue?

Thanks very much for your time!

Best,

Katie