SLSTR A Spot

Sea and Land Surface Temperature Radiometer

SLSTR A Spot
SLSTR A Spot

The Sentinel-3 Sea and Land Surface Temperature Radiometer (SLSTR) continues and improves sea surface temperature records, as well as providing new atmosphere related products.

Last Updated

18 November 2020

Published on

30 June 2020

SLSTR instrument overview. Credit: ESA

SLSTR aims is to collect highly accurate measurements to provide a reference dataset for other sea surface temperature (SST) missions on other satellites.

The dual view, nine-channel SLSTR has a resolution of 500 m in the visible and shortwave infrared and 1 km in the thermal infrared and include two channels optimised for fire monitoring. It has a wide swath of 1400 km in the nadir view and 740 km in the dual view.

As well as monitoring SST, the instrument also monitors sea and land ice temperature, atmospheric aerosols and cloud properties and fires (both over land and for ocean gas flares).

Main characteristics

  • Swath width: dual view scan, 1 420 km (nadir) / 750 km (backwards).
  • Spatial sampling: 500 m (VIS, SWIR), 1 km (MWIR, TIR).
  • Spectrum: nine bands [0.55-12] ┬Ám.
  • Noise equivalent dT: 50 mK (TIR) at 270 K.
  • Launch mass: 90 kg.
  • Size: 2.116 m3.
  • Design lifetime: 7.5 years.

For further information please see the Sentinel-3 SLSTR handbook.

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