The MODIS L2 Joint Atmosphere Product (ATM L2) will be produced at the MODAPS facility of
NASA Goddard Space Flight Center. MODAPS will produce 100% of the ATML2 product.
Typically 288 ATM L2 HDF files are produced per day, however
since some parameters are produced only during the daytime,
the nighttime HDF files are considerably smaller than their daytime counterparts.
It should be noted that since both MODIS terminator granules (for both ascending and descending nodes)
are counted as day, a full 55% of all MODIS granules are labeled daytime.
With each daytime HDF file roughly 2.9 MB in size and each nighttime HDF file roughly 1.5 MB in size,
the total data volume is approximately 650 MB per day.
Run MOD_PRATML2 night and day on each MODIS L2 granule if MOD03,
MOD05_L2, MOD06_L2, MOD07_L2 and MOD35_L2 are all present.
Otherwise, delay production of this L2 granule until missing ESDTs
(among the 5 above) have been either recovered and ingested into
MODAPS or determined to be not-available for this processing cycle.
Then run if both MOD03 and any of MOD05_L2, MOD06_L2 and MOD07_L2
Note that MOD04_L2 is also input to MOD_PRATML2, but it is produced
(by PGE04) only when the MODIS instrument is in daymode and only for a
subset of daytime granules (minimum solar zenith angle < specified
threshold). However, MOD04_L2 is never archived without an associated
MOD05_L2 product. Thus, "MOD05_L2 present and MOD04_L2 not" implies
"MOD04_L2 not produced" (exception is database retrieval error) and
the MOD_PRATML2 production rules do not require separate accounting of
Required Input Products
ESDT Name Description
MOD03 MODIS Terra Geolocation product
One of MOD04_L2, MOD05_L2, MOD06_L2 or MOD07_L2
(see descriptions under Optional Inputs)
Selection Rule: for all ESDT above
Choose granule whose RangeDateTime metadata matches the
collection period of MODIS output granule.
Optional Input Products
ESDT Name (in sec) Description
--------- -------- -----------
MOD04 0 MODIS Terra Aerosol product
MOD05 MODIS Terra Precipitable Water product
MOD06 MODIS Terra Cloud product
MOD07 MODIS Terra Profiles product
MOD35 MODIS Terra Cloud Mask product
Selection Rule: MOD04
Choose granule whose RangeDateTime metadata matches the collection period
of MODIS output granule.
ESDT Name Description
MODATML2 MODIS Terra Level-2 Joint Atmosphere product (HDF)