Progress of reprocessed long-term data records from Fengyun satellites

NSMC/CMA has been continuously pushing forward the reprocessing of Fengyun series dataset for better quality, especially L1 product. A comprehensive Fengyun historical data rescue and reprocessing task has been completed. At present, the early historical data of FY-1 archive was rescued and L1 data was reproduced providing full data record since 1988. The long-term L1 data reprocessing includes 7 instrument series on 13 satellites in FY-1, FY-2 and FY-3 missions. There are 3 optical imagers with 2 in polar orbit and 1 in geostationary orbit, 1 infrared sounder, 1 microwave imager, and 2 microwave sounders. After reprocessing, the sensor related instability issues caused by instrument degradation and instrument status changes are solved. The inter-platform consistency is also improved by radiometric reference transfer correction in each instrument series. The Fengyun fundamental climate data records (FCDRs) for 7 instruments have been evaluated by radiometric comparison with reference instruments or RTM simulations. The reprocessed L1 dataset has also supported long-term dataset generation for several geophysical parameters. This paper gives an overview of the data reprocessing efforts.