The Radio Occultation Meteorology Satellite Application Facility (ROM SAF) is a decentralised processing centre under EUMETSAT which is responsible for operational processing of radio occultation (RO) data from the Metop, Sentinel-6 and Metop-SG satellites and radio occultation data from other missions. The ROM SAF delivers geophysical variables in near real-time for NWP users, as well as offline RO data and reprocessed Climate Data Records (CDRs) and Interim Climate Data Records (ICDRs) for users requiring a higher degree of homogeneity of the RO data sets. The CDRs and ICDRs are further processed into globally gridded monthly-mean data for use in climate monitoring and climate science applications. The ROM SAF also maintains the Radio Occultation Processing Package (ROPP) which contains software modules that aid users wishing to process, quality-control and assimilate radio occultation data from any radio occultation mission into NWP and other models.

ROM SAF Product Archive
For access to the data products, please use the Product Archive

NRT Monitoring of RO Data
ROM SAF monitoring and data flow
ECMWF ROM SAF monitoring statistics


Release of ROM SAF atmospheric profile products from Sentinel-6 observations
These ROM SAF products include geophysical variables generated from Sentinel-6 Michael Freilich radio occultation observations. Read more here.
[December 16, 2021]

Publication of ROM SAF Report 42
This report describes a one-dimensional variational ionospheric retrieval for truncated GNSS Radio Occultation measurements. Read more here.
[October 20, 2021]

Publication of VS report on decadal trends in RO data
This report contains an analysis of decadal trends in RO data. Read more here.
[September 10, 2021]

Publication of Operations Report 2021 H1
This report contains the reporting of the ROM SAF operations activities for the 5-month period January - May (H1) of 2021. Read more here.
[July 14, 2021]

Publication of ROM SAF Report 41
This report contains an assessment of the ROM SAF 1D-Var sensitivity to various choices of observation uncertainty and error correlation. Read more here.
[July 7, 2021]

→ News Archive

DMI's logo IEEC's logo Met Office's logo
ECMWF's logo