EUMETSAT are updating the scan reflectivity for the IASI ground processing on Metop-B.
You will find the corresponding new auxiliary files (GRD and BRD) in the usual place: ftp://ftp.eumetsat.int/pub/NWPSAF/aapp_data_files/OPS-LRS/aux_data/
EUMETSAT say that they will make this operational on the 30th of July, but there will be no impact on the level 1c radiances.
OPS-LRS users are recommended to download and use the new files but it is not mandatory, as the processing will still work with the old ones.
Nigel