BackForward Satellite: Sentinel-3A 

Satellite details
Acronym Sentinel-3A
Full name Sentinel-3A
Satellite Description
  • 1st flight unit of the Sentinel-3 programme.
  • Main mission: ocean and land observation.
  • Substantial contribution to Solid Earth (topography).
Mass at launch 1250 kg Dry mass 1150 kg
Power 2300 W
Data access link
Data access information
  • Description of data services at
  • Product delivery timeliness may be:
    • Near-Real-Time (NRT): < 3 h from sensing
    • Short Time Critical (STC): < 48 h from sensing
    • Non-Time Critical (NTC): < 1 month from sensing.
  • NRT Marine products are distributed by EUMETSAT by EUMETCast and via the Copernicus Online Data Access.
Orbit Sunsynchronous orbit Altitude 814.5 km
ECT 10:00 desc


Status Operational
Details on Status
(as available)
  • Sentinel-3A operations were transferred from ESA to EUMETSAT on 13 July 2016.
Launch 16 Feb 2016 EOL ≥2023
Last update: 2020-08-21
Associated satellite programme and related satellites

Note: red tag: no longer operational , green tag: operational , blue tag : future

Satellite Payload

All known Instruments flying on Sentinel-3A

Acronym Full name
DORIS Doppler Orbitography and Radiopositioning Integrated by Satellite
GPS GPS Receiver
LRR Laser Retro-Reflector
MWR Micro-Wave Radiometer
OLCI Ocean and Land Colour Imager
SLSTR Sea and Land Surface Temperature Radiometer
SRAL Synthetic aperture Radar Altimeter
Show instrument status and calibration
Telecommunication frequency or microwave sensing channel information Show expert details
Service Dir or Mode Frequency Emission designator Bandwidth Polarisation D/A Data rate or Baseband Comments
Raw Data S-E 8095 MHz 140MG1D 140000  kHz RHCP D 260000/280000  kbps Raw data downlink
Raw Data S-E 8260 MHz 140MG1D 140000  kHz RHCP D 260000/280000  kbps Raw data downlink
DORIS E-S 401.25 MHz 23K0G1D 23  kHz RHCP D 4  kbps Precise positioning by DORIS
DORIS E-S 2036.25 MHz 95K0G1D 95  kHz RHCP D 4  kbps Precise positioning by DORIS
TC E-S 2075.65 MHz 768KG2D 768  kHz RHCP D 64  kbps Telecommands
TM S-E 2254.1 MHz 2M20G1D 2200  kHz RHCP D 2000  kbps High Data Rate Telemetry
SRAL active 5410 MHz 320000.0  kHz - A   C-band radar altimeter
SRAL active 13575 MHz 350000.0  kHz - A   Ku-band radar altimeter
MWR passive 23800 MHz 400000.0  kHz - A   Water vapour channel (supporting altimeter)
MWR passive 36500 MHz 1000000.0  kHz - A   Window channel (supporting altimeter)