Mea culpa, mea culpa! This summer we discovered there was another bug hiding in our 2020 simulation. If you happened to look at tropospheric ozone from May-Dec you might have wondered how the world got so polluted…especially with reduced travel during the pandemic. This affected all 2020 files. Please replace any 2020 file you currently have with a new one!!!
The new Dobson, Sonde, and Lidar files have ‘MR2V4’ in their name, while the current FTIR files are ‘MR2V3’. All files can be downloaded via anonymous ftp from
It is our pleasure to send you the First Announcement of the 30th International Laser Radar Conference (ILRC-30), to be held from June 26 to July 1st, 2022 in Big Sky, Montana, USA. The announcement flyer is 
Progress continues on the migration of the NDACC DHF from its original home at NOAA's Climate Prediction Center (CPC) to its new home at NASA Langley Research Center (LaRC). New this month is the availability of the NCEP temperature and height extraction tool on the public LaRC NDACC DHF (