Airbus Defence and Space

The high-precision Sentinel-5 instrument

The Sentinel-5 Mission is part of the European Earth Observation Programme "Copernicus" (www.copernicus.eu), which creates a modern, capable infrastructure for Earth observation and geo-information services. The programme is run by the European Commission together with the European Space Agency (ESA) and the European Environment Agency (EEA).

The Sentinel-5 mission objective is to monitor the composition of the Earth atmosphere for GMES Atmosphere Services by taking measurements of trace gases and aerosols impacting air quality and climate. Characterization of trace gases concentration in the atmosphere such as ozone, nitrogen dioxide, sulphur dioxide, methane, formaldehyde and carbon monoxide will enable services addressing the air quality on a near real-time basis but as well on a longer term for climate impact assessment.

The Sentinel-5 mission will consist of an UVNS spectrometer covering relevant bandwidths in the Ultra-Violet (UV), Visible (VIS), Near Infrared (NIR) and Short Wave Infrared (SWIR) spectral domains.

Airbus Defence and Space is Prime Contractor for the design, development, assembly, integration, test and verification of the Sentinel-5/UVNS instrument.

Sentinel-5 will be embarked as a Customer Furnished Item (CFI) on the future MetOp-SG platforms. These satellites, with more than seven years lifetime, will be flying in an 816 km polar orbit and will be operated by EUMETSAT.

 

Customer

European Space Agency (ESA)

Mission objectives

Continuous measurement of the chemical composition of the atmosphere, monitoring of air quality, climate change impact, concentration of aerosols in frame of the Copernicus Program.

Data products

The main data products will be O3, NO2, SO2, HCHO, CO, CH4 and aerosol optical depth.

Mission orbit

MetOp-SG-A, LEO, polar, sun-synchronous
ca. 817 km altitude
Inclination: 98.4701°
Repeat cycle: 29 days

Spectral range

  • Ultraviolet 1                             270 to 330 nm
  • Ultraviolet 2 - Visible               300 to 500 nm
  • Near Infrared                          685 to 710, 750 to 773 nm
  • Short Wave Infrared 1            1590 to 1675 nm
  • Short Wave Infrared 3            2305 to 2385 nm

Spectral resolution

1 nm and 0,25 nm depending on the spectral range

Swath width

2,670 km

Spatial resolution

7.5 km x 7.5 km

Service life

> 7 years

Optical module components

  • Telescope & beam splitter assembly
  • UV1 spectrometer optics
  • UV2VIS spectrometer optics
  • NIR spectrometer optics
  • SWIR subsystem
  • Calibration subsystem
  • UVN detector
  • SWIR detector
  • Front end electronic
  • Detection support electronics
  • Structure and radiators
  • Thermal hardware
  • Instrument control subsystem
  • Harness

Weight

270 kg

Size

1.0 x 1.6 x 1.2 m

Launch

2021

Airbus Defence and Space responsibility

Prime contractor

Subcontractor:

Airbus Defence and Space Netherlands
Airbus Defence and Space SAS
Almatech
Crisa
DTM
e2v Technologies
Thales Alenia Space Espana
Finmeccanica
Jena Optronik
LusoSpace
Micos
RAL
RUAG Austria
Siemens CVC Austria
Sodern
Sofradir
Space Systems Finland
TNO

 

Key Features:

Modular architecture allowing for parallel subsystems development and a flexible industrial procurement and integration sequence:

  • The single spectrometers are individually optimized for spectral and radiometric requirements. Innovative technologies for the Polarization Scrambler and Slit Homogenizer devices allow measurements with high accuracies independent of the polarization and heterogeneity of the observed scene.
  • The CCD detectors for the UVN channels and the MCT Detectors for the SWIR channels together with the Front End and Detection Support Electronic form an integrated system over all spectrometers.
  • The Calibration Subsystem allows calibration with high absolute accuracy using sun light and on-board illumination sources every orbit.
  • A Carbon-Fibre-Re-enforced-Polymer (CFRP) main structure ensures mechanical and thermal the stabilities required by the single spectrometers under changing loads per orbit and over the operational life-time of the instrument.
  • Featuring passive cooling the thermal control system provides temperature conditions adapted to the different requirements of the instrument modules. The temperature variation is stabilized better than 1K during one orbit.
  • The Instrument Control Subsystem performs on-board data processing and forms the functional interface to the satellite.

 

Sentinel-5 Instrument in context to other satellite instruments

Sentinel-5/UVNS will follow the Sentinel-5 Precursor mission, which is due to be launched in 2016 as a short-term solution to fill the gap between current European atmospheric monitoring satellites and the Sentinel-5 mission.

Sentinel-5/UVNS is the continuation of successful instruments like SCIAMACHY and OMI, as well as TROPOMI flying on Sentinel-5 Precursor

Along with Sentinel-5/UVNS, the following three instruments on board the MetOp-SG satellites will deliver complementary information:

  • InfraRed Atmospheric Sounding Interferometer IASI-NG (atmospheric temperature and humidity profiles; prime contractor: Airbus DS France)
  • Multi-viewing , Multi-channel, Multi-polarisation Imager 3MI (characterisation of atmospheric aerosols)
  • METimage (characterisation of clouds, prime contractor: Jena-Optronik)

The Sentinel-4/UVN spectrometer (prime contractor: Airbus DS Germany) on board the MTG satellites monitors the Earth atmosphere composition over Europe from geostationary orbit in a subset of the Sentinel-5/UVNS spectral range.


Download the pdf version - 338 ko

 

Airbus Defence and Space

Robert-Koch-Str, 82024 Taufkirchen

E ENS.info@astrium.eads.net

Airbus Defence and Space Netherlands
Airbus Defence and Space SAS
Almatech
Crisa
DTM
e2v Technologies
Thales Alenia Space Espana
Finmeccanica
Jena Optronik
LusoSpace
Micos
RAL
RUAG Austria
Siemens CVC Austria
Sodern
Sofradir
Space Systems Finland
TNO

Sentinel-5Earth observation satelliteAtmosphereCopernicusMetOpAirbus Defence and Space