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 Metop and reprocessing of 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 CDRs (ICDRs). The data records and offline data are further processed into globally gridded monthly-mean data for use in climate monitoring and science. The ROM SAF also maintains the RO Processing Package (ROPP) which contains software for processing RO data and for assimilating RO data into NWP 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 Operations Report 2020 H2
This report covers the 7-month period June -- December (H2) of 2020. Read more here.
[February 26, 2021]

Release of software package ROPP version 10.0
The ROM SAF announces the release of ROPP-10.0, the latest update of the Radio Occultation Processing Package (ROPP). Read more here.
[February 9, 2021]

Publication of VS report on impacts of under-sampling the diurnal cycle
The VS study investigated Bayesian interpolation in order to analyse and map the atmospheric diurnal cycle. Read more here.
[January 19, 2021]

Offline products version 1.1 released since August 2019
Offline products (version 1.0 and version 1.1) based on Metop data are available covering the period from January 2017 and are regularly updated every month. Read more here.
[November 20, 2020]

Publication of VS report on ionospheric correction of bending angles
The VS project studied the bi-local correction approach and the Kappa correction for the purpose of mitigating the residual ionospheric errors in radio occultation data. Read more here.
[September 28, 2020]

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