The Goddard Earth Sciences Data and Information Services Center (GES DISC) and the Jet Propulsion Lab (JPL) Sounder Science Investigator-Led Processing Systems (SIPS) team have released the Climate Fingerprinting Sounder Product (ClimFiSP) Level 3, Version 2 monthly data collections.
Level 3 ClimFiSP geophysical variable retrievals are obtained directly (i.e., without going through Level 2) from the Climate Hyperspectral Infrared Radiance Product (CHIRP), a Level 1 radiance product that harmonizes measurements from three different infrared sounding instruments: the AIRS sensor on EOS-Aqua and the CrIS sensors on the Suomi-NPP and NOAA-20 (JPSS-1) satellites. See Wu et al. (2020) for details on ClimFiSP “climate fingerprinting” algorithm.
Each ClimFiSP monthly granule (data file) contains geophysical variable retrievals for two orbit passes — ascending and descending — at approximately 1:30 p.m. and 1:30 a.m., respectively. Data are available globally on a 0.5 x 0.5 latitude by longitude grid across 98 atmospheric pressure levels covering the period from 2002 to present. (See dimensions in the table below.)
ClimFiSP monthly collections use a simple average to summarize the retrievals from each satellite's ascending and descending orbit passes for the 28 to 31 daily granules in a calendar month. The monthly granules also include standard deviations and the number of observations used to produce each monthly value.
Additional information can be found on the data collection landing pages and in the ClimFiSP Data Product User Guide.