Minimize Instrumental Payload

The SENTINEL-5P satellite carries a single payload instrument: TROPOMI (TROPOspheric Monitoring Instrument).

Within the Netherlands TROPOMI is a collaboration between KNMI (Royal Netherlands Meteorological Institute), SRON (Space Research Organization Netherlands), TNO (Netherlands Organization for Applied Scientific Research), and Airbus DS-NL, on behalf of NSO (Netherlands Space Office). KNMI (PI) and SRON (co-PI) are responsible for the project's scientific management and data products. Airbus DS-NL is the principal contractor for instrument construction. Many European industries have contributed to the subsystems. TROPOMI development is jointly funded by NSO and ESA, with both agencies covering programmatic aspects. The Belgian Institute for Space Aeronomy (BIRA) and the German Aerospace Centre (DLR) contributed for the TROPOMI Level-2 development.

 

The main characteristics of TROPOMI are:

  • Type: passive grating imaging spectrometer
  • Configuration: Push broom staring (non-scanning) in nadir viewing
  • Swath width: 2 600 km
  • Spatial sampling: 7x7 km2
  • Spectral: 4 spectrometers, each electronically split in two bands (2 in UV, 2 in VIS, 2 in NIR, 2 in SWIR)
  • Radiometric accuracy (absolute): 1.6% (SWIR) to 1.9% (UV) of the measured earth spectral reflectance.
  • Overall mass: 204.3 Kg not including ICU (16.7 kg) that is integrated on the platform, separated from the instrument.
  • Dimensions: 1.40 x 0.65 x 0.75 m
  • Design lifetime: 7 years
  • Average power consumption: 155 W
  • Generated data volume: 139 Gbits per full orbit.

The Level 1B Algorithm Theoretical Basis Document (ATBD), provides detailed information on the instrument and the algorithms needed to process TROPOMI Level 0 data to Level 1B.

 

Figure 1: TROPOMI instrument (credit: TNO, Airbus DS-NL). Click on the image to enlarge.