Last Update: August 22, 2006
At the present time atmospheres forward processing is being conducted using
Collection 4 and 5 codes. All atmospheres L2+ products from this processing are
being exported to the GES DAAC and LAADS. Collection 4 forward
production will continue until LAADS service begins to the general community
presently being served by the GES DAAC. Collection 4 Aqua processing stopped on July 1, 2006
and Terra is estimated to stop at the end of August, 2006.
All of the historical Collection 4 L3 atmospheres products have already been
archived in LAADS. Since the GES DAAC silos are being withdrawn from
operations starting this year, the GES DAAC will not be able to maintain its
Collection 4 atmospheres holdings for the proscribed 6-months interval
beyond generation of Collection 5 products. Consequently, starting in
June, 2006 the GES DAAC L2 holdings including cloud mask/profiles will be
transferred to LAADS. This transfer will be completed by mid-December.
The GES DAAC will continue to provide users with access to Collection 4
atmospheres products until that time.
The GES DAAC stopped the production of Collection 4 L1 data products on
dataday 55 (February 24, 2006). The GES DAAC will continue to distribute
Collection 4 L1B, geolocation, and cloud mask for intervals earlier than
dataday 55 until early-September when the distribution of all Collection 4
data products will be terminated (see above). The distribution of L1B,
geolocation, and cloud mask products after dataday 55 will become the
responsibility of MODAPS after February 24, 2006. The distribution of
these products for all of the Collection 4 interval will become MODAPS
responsibility after early-September, 2006
MODAPS will archive Collection 4 cloud mask/profiles in LAADS. However,
MODAPS will not archive either Collection 4 L1B or geolocation products
in LAADS. MODAPS maintains a "rolling" data pool for Collection 4 forward
processing L1B and geolocation. This data pool has a capacity of 21
datadays (compressed using hrepack) of Aqua and 21 datadays of Terra
All Collection 5 geolocation and atmospheres products including browse and
cloud mask/profiles from both forward processing and reprocessing will be
archived in LAADS. All products will be archived in internally compressed
form. The data volumes and files associated with each ESDT are identified
in the Atmospheres Archive Table (MSExcel
spreadsheet). Terra reprocessing started on June 30th at Terra firstlight.
(Collection 5 Land Reprocessing Plan).
L1B data products for the CONUS and European regions will also be archived in LAADS in compressed
form. The Asian region will be added in late August. The remaining
L1B products will not be archived in LAADS but will be temporarily available
through a "rolling" data pool. The capacity of this data pool will be
approximately 300 datadays of L1B (compressed using hrepack) which is
equivalent to approximately 20 calendar days of reprocessing and forward
processing production. User access to the data pool will be provided
through the LAADS or by direct access. Any user requests for Collection 5
L1B data older than the most recent 20 days of production should also be
submitted through LAADS. This will be satisfied on a processing-on-demand
Details of the atmospheres reprocessing plan can be found at
Collection 5 Atmospheres Reprocessing Plan.
Data access instructions are given under
The LAADS Web
page provides a detailed identification of the Collection 4 and 5 data
products available through LAADS.