RSS Version 3.3 Channels TLT, TMT, TTS and TLS – January, 2010 RSS Version 3.2 Channel TLT – November, 2008 RSS Version 3.2 Channels TMT, TTS, and TLS – July, 2008
Changes from 3.2 to 3.3:
Additional satellites are now included in the merge. Version 3.2 only used data from one AMSU instrument, NOAA-15. For TLT, TMT, and TLS, Version 3.3 includes data from the AMSU instruments on NOAA-15, AQUA, NOAA-18, and METOP-A. AMSU channel 7 exhibits unexplained drifts in METOP-A, so for TTS, data from METOP-A is not used.