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 also provides a service which monitors the quality of RO data from available missions by using NWP models:

• ROM SAF Met Office NRT monitoring: NRT monitoring
• ROM SAF ECMWF NRT monitoring: ECMWF monitoring

ROM SAF Spire NRT production based on data procured by NOAA
Upcoming production of near real-time (NRT) products based on a subset of radio occultation (RO) measurements from the Spire constellation of nanosatellites. Read more here.
[May 25, 2023]

Provision of GNSS-RO bending angle uncertainty estimates
We now provide monthly estimates of the radio occultation bending angle uncertainties for Metop, COSMIC-2 and Spire. Read more here.
[March 22, 2023]

Atmospheric temperature changes in the first two decades of the 21st century
Radio occultation data give a detailed view of the atmospheric temperature changes in the first two decades of the 21st century. Read more here.
[March 16, 2023]

Publication of ROM SAF Operations Report 2022 H2
This report covers the 7-months period June–December (H2) of 2022 Read more here.
[March 3, 2023]

Start of dissemination of ROM SAF Spire NRT products on GTS
New RO NRT products generated from Spire measurements now available on the GTS. Read more here.
[October 27, 2022]

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