GPM NOAA15 etc. corrupt files

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aradovan11
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GPM NOAA15 etc. corrupt files

by aradovan11 » Wed Jul 14, 2021 4:50 am America/New_York

Hi to someone hopefully able to help!

After downloading the files from eg.: https://gpm1.gesdisc.eosdis.nasa.gov/da ... /2006/336/ first file seems to have inaccessible variables such as 'ScanTime', while brightness temperature 'Tc' shows length of the data is zero. The same happens randomly for some other years and satellites (N16, N17, N18) files.
I wonder what should be the cause for this and look forward on your reply which I hope will shed some light on it.

Best regards,
Ana

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GES DISC - jimacker
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Re: GPM NOAA15 etc. corrupt files

by GES DISC - jimacker » Tue Jul 27, 2021 4:52 pm America/New_York

We apologize for the delay in our reply. We are examining your question now and will provide more information shortly.

GES DISC - jimacker
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Re: GPM NOAA15 etc. corrupt files

by GES DISC - jimacker » Wed Jul 28, 2021 4:35 pm America/New_York

Hello,

We have determined that the granule you indicated is an empty file due to a data outage. The Precipitation Processing System (PPS) has an outage table:

https://arthurhou.pps.eosdis.nasa.gov/D ... 05_V06.pdf

This can be examined if you encounter other empty granules to determine if they were caused by a data outage.

It is also possible to examine the global file attributes stored as "FileHeader". In this case, the string "EmptyGranule" is set to "EMPTY", confirming that this file has no data. The image shows an excerpt of the global file attributes with the "EmptyGranule" string at the end of the third line.

PPS file header image.png
PPS file header image.png (96.21 KiB) Not viewed yet

aradovan11
Posts: 2
Joined: Wed Jul 14, 2021 4:37 am America/New_York

Re: GPM NOAA15 etc. corrupt files

by aradovan11 » Sat Jul 31, 2021 4:43 am America/New_York

Thanks jimacker for providing the table with data outage.
I thought it could be that but wanted to have a firm answer about those files.
Cheers!

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