The NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) receives data from the Atmospheric CO2 Observations from Space (ACOS) project based at the NASA Jet Propulsion Laboratory (JPL). The ACOS project is receiving calibrated L1B radiance data from the Japanese Space Agency (JAXA) Greenhouse gases Observing SATellite (GOSAT), also called "Ibuki". The ACOS project adds geolocation information and further corrections, resulting in retrievals of column-averaged CO2 in units of dry-air mole fraction (Xco2), and sends these science retrievals for archival and user support to GES DISC.
The ACOS Project recently announced a pause in data processing. The full announcement is below.
"The ACOS data production for algorithm Version 2.8 (collection version 002) has been paused since May 17, 2011, because changes to the L1B data, made since that time, have not been fully evaluated. Meanwhile, an updated version of the L2 algorithm is undergoing evaluation. This updated version will be compatible with all L1B versions, and will allow the ACOS Team to reprocess the complete data record."
ACOS L2S data, the Level 2 Full Physics Standard Product, is available via the Goddard data archive and ordering engine Mirador.