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CMR entries for GPM IMERG datasets occasionally miss files.
The files for 21:00 and 21:30 are present in https://gpm1.gesdisc.eosdis.nasa.gov/data/GPM_L3/GPM_3IMERGHHL.06/2020/238/, yet CMR does not know about them.
Compare 2 results here
with the previous day's 4 results
This skips files for 01:00 and 01:30
Note how the file for 00:30
is followed by the file for 02:00
But https://jsimpsonhttps.pps.eosdis.nasa.gov/text/imerg/late/202212/ has these files.
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There is nothing missing in CMR for IMERGHHL.
Users should be careful in using CMR API queries, and give sufficiently large page_size, and even give page_num, especially when globbing () is used in the temporal constraints.
We recommend always using the EDSC interface to check the available inventory, and thus you can diagnose CMR API queries.
It’s worth noticing that there is latency between files appearing on the jsimpson host, then in s4pa (GES DISC), and then in CMR. That may give an apparent impression of two files from the leading edge missing in CMR, but that should resolve within an hour.