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Sorry Dan,
L1A extracts are not yet supported for VIIRS.
It is on the the todo list and may be available soon.
You can order the full L1A and extract them yourself using SeaDAS or you can have our system extract the L2 products.

Tommy

There were some level-0 files on our archive from 2012 that were replaced with better copies when the format was changed, and the new L1A files were automatically submitted for  both QL and refined processing simultaneously.  Since the refined ancillary data from 2012 were available, both ...

We were caught off-guard by the atteph name change as well. LANCE-MODIS announced  it as an upgrade to Collection 6.1 (C6.1), for all
MODIS Level-1 (L1) and higher-level Level-2 (L2) & Level-3 (L3) Atmosphere Team products The missing atteph files should show up shortly.

Tommy

There was an unrecoverable instrument anomaly on that day (29 Sep 2017)  that resulted in missing L0 data and partial L1A files.  The incomplete daily file required some forcing to get it through the system. You should see it on the data server shortly.

Tommy

We only distribute the Refined version of the data through OPeNDAP while the Direct Access page distributes both the QuickLook and Refined data. There is typically an 18 day delay between the the two versions while we wait for all the refined ancillary data types.

Tommy

There appears to be a web database issue, unrelated to the network outage.
Give it a couple of hours and try again.

Tommy

The monthly files are mean values for the month bounded by the dates in the file name.T20000322000060.L3m_MO_SST_sst_4km.nc would be the mean values for February 2000. (Day of year 32-60)The monthly climatology files are the means for the same days of the year bounded by the dates in the file nameT2...

They are mixed granules with both day and night pixels. You can check the metadata for  global attributes :day_night_flag = "Mixed" ;   to exclude them from your processing.
Tommy

It looks like we have found a solution to the email problem as well. It should be restored on Monday. Thanks for your patience.

Tommy

Sorry for the trouble you are having.This is a new web interface to the subscriptions system and the developers are still refining it. The "extract files" option must have been selected when the subscription was initially submitted.It cannot be changed at this point without creating a new ...