Sentinel 6 MF Main Image

Sentinel-6 Radio Occultation NRT products now disseminated by JPL

Sentinel 6 MF Main Image
Sentinel 6 MF Main Image

Copernicus Sentinel-6 Michael Freilich Radio Occultation NRT products started to be disseminated by the Jet Propulsion Laboratory (JPL) on 24 August 2021.

Last Updated

25 August 2021

Published on

25 August 2021

The JPL-produced NRT GNSS-RO Level 1B and 2 BUFR products contains neutral atmosphere, L1, and L2 bending angle profiles with impact height and neutral atmosphere refractivity profiles with mean-sea-level altitude. One BUFR file is approximately 17.5kB in size and is generated for each retrieved occultation. The BUFR products are produced every orbit, which is nominally about 113 minutes in duration.

The BUFR product files have the following naming convention:


<STARTTIME> is the UTC time at which the occultation begins
<LEO> is “S6A” or “S6B”
<GNSS> is the identifier for the occulting GNSS transmitter
<VERSION> is the integer product version number, which for this release is “1”.

An example file name for an occultation of the GPS satellite with PRN 23 received by Sentinel-6 MF at UTC time 2021-07-01T03:14:15 is:

RO-TriG-S6A-G23_L1bL2_NRT_v1_20210701T031415.bfr .

The contents of the NRT BUFR products will be captured also in netCDF format and archived at NASA’s Goddard Earth Sciences Data and Information Services Center (GES DISC) for 60 days. The NRT netCDF products will also contain Level 1A data (including excess phase data), Level 1B bending angle profiles at higher sampling rates and vertical resolutions than reported in the BUFR product, and Level 2 atmospheric profiles. Public accessibility of the NRT netCDF products will be provided at a later date.

Sentinel-6 Michael Freilich GNSS-RO Near-Real-Time Science Data Product release note

The Sentinel-6 radio occultation instrument

NASA/JPL is responsible for providing near-real-time (NRT) RO products for numerical weather prediction (NWP) applications that are covered in this release. EUMETSAT is responsible for nontime-critical (NTC) RO products that will be released at a later date.

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