The CALIPSO mission was interrupted on 28 January, 2016 because of a GPS receiver issue. The payload went back to a nominal data acquisition state on 14 March 2016. Expedited data processing and standard processing resumed on that day along with data distribution at ICARE and NASA/LaRC. Unfortunately, data loss between 28 January and 14 March 2016 is unrecoverable.
More information on the incident can be found on the CNES-CALIPSO website:
in French:
in English :