The latest products are from the Third (A)ATSR Reprocessing, conducted in 2013. This introduced some key improvements:
Evaluation and quality reports, as well as auxiliary information, from the Third Reprocessing are contained within the Third Reprocessing Information Pack
AATSR Technical Documents
The following documentation is available for the Envisat-format Level 1 and Level 2 products:
The following documentation is available for the SST L2P/L3U products:
The following documentation is available for the UOL LST products:
AATSR Product Availability
Information on AATSR products and how to access them is given in the Product Availability section.
AATSR Fourth Reprocessing - in planning
Planning for the 4th reprocessing of (A)ATSR data is under way. The main focus is to harmonise the product format with that from SLSTR. More information is available here.