The Radio Occultation Meteorology Satellite Application Facility (ROM SAF) is a decentralised processing centre under EUMETSAT which is responsible for operational processing of GRAS radio occultation (RO) data from the Metop satellites and also reprocesses RO data from other missions. The ROM SAF delivers bending angle, refractivity, temperature, pressure, humidity, and other geophysical variables in near real-time (for NWP users) and in offline (for research use), as well as 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 (and also the offline data) 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


Publication of ROM SAF Report 35
This report describes results from an initial assessment of the quality of the radio occultation data from the Chinese FY-3D satellite. Read more here.
[October 11, 2019]

Release of software package ROPP version 9.1
The ROM SAF is pleased to announce the release of ROPP-9.1, the latest update of the Radio Occultation Processing Package (ROPP). Read more here.
[September 18, 2019]

The ROM SAF reanalyses
The release of two ROM SAF reanalyses based on "anchor measurements". Read more here.
[September 13, 2019]

Publication of ROM SAF Operations Report 2019 H1
This report covers the 5-month period January -- May of 2019. Read more here.
[September 6, 2019]

Publication of Visiting Scientist report on using radio occultation data as primary anchor in NWP systems
The ROM SAF is pleased to release Visiting Scientist report No. 37 by Jordis S. Tradowsky, Bodeker Scientific, New Zealand. Read more here.
[August 21, 2019]

→ News Archive

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