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 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]

ICDR product version 1.1 released since August 2019
Interim Climate Data Record (ICDR) products based on Metop data are now available covering the period from January 2017 and are regularly updated every month. Read more here.
[September 22, 2020]

Publication of ROM SAF Report 39
This report contains an assessment of the impacts of RO mission differences on trends in multi-mission data records. Read more here.
[September 14, 2020]

Publication of ROM SAF Report 38
This report contains an initial assessment of the quality of RO data from the COSMIC-2 satellites. Read more here.
[August 20, 2020]

Publication of ROM SAF Operations Report 2020 H1
This report covers the 5-month period January May of 2020. Read more here.
[July 16, 2020]

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