Level 2 Performance and Test Report for the version 6 data release for the Atmospheric Infrared Sounder on NASA's Aqua satellite. Covers AIRS geophysical data products, layer to level transformation. Includes numerous tables and figures. Downloadable versions of the V6 User Guides are available from NASA's Goddard Earth Sciences Data and Information Services Center at http://disc.sci.gsfc.nasa.gov/AIRS/documentation.