Questions/Comments • Re: AU_SI12_NRT_R04 CMR results include non-published data

We noticed another issue with the data CMR is reporting available for this dataset.

Today, when I look at the CMR results, I see data files for 2024-02-14 listed on both servers. E.g., here are the "related-urls":

"RelatedUrls": [
{
"URL": "https://lance.nsstc.nasa.gov/amsr2-science/data/level3/seaice12/R04/hdfeos5/AMSR_U2_L3_SeaIce12km_P04_20240215.he5",
"Type": "GET DATA",
"Description": "Online access to AMSR-2 Near-Real-Time LANCE Products (primary)"
},
{
"URL": "https://lance.itsc.uah.edu/amsr2-science/data/level3/seaice12/R04/hdfeos5/AMSR_U2_L3_SeaIce12km_P04_20240215.he5",
"Type": "GET DATA",
"Description": "Online access to AMSR-2 Near-Real-Time LANCE Products (backup)"
},
{
"URL": "http://dx.doi.org/10.5067/AMSRU/AU_SI12_NRT_R04",
"Type": "VIEW RELATED INFORMATION"
}
],
"DataGranule": {
"DayNightFlag": "Both",
"ProductionDateTime": "2024-02-16T07:59:28.000Z",
"ArchiveAndDistributionInformation": [
{
"Name": "Not provided",
"SizeUnit": "MB"
}
]


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The URL for the backup server (https://lance.itsc.uah.edu/amsr2-science/data/level3/seaice12/R04/hdfeos5/AMSR_U2_L3_SeaIce12km_P04_20240215.he5) results in a 404/Not Found error. Manually inspecting the listing for this server's files, I see that an R file is available for this day: https://lance.itsc.uah.edu/amsr2-science/data/level3/seaice12/R04/hdfeos5/AMSR_U2_L3_SeaIce12km_R04_20240215.he5.

My application programmatically uses CMR to select the most recent R files as input, falling back to a P file if the R file doesn't exist. This particular case results in the P file being used even though an R file is available because CMR does not report it.

Statistics: Posted by treystaff — Mon Feb 19, 2024 3:50 pm America/New_York

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