Instrument Specifications

The table below shows the engineering requirements of the instrument, which have been derived from the Sentinel-3 mission requirements.

Technical Characteristics of the Sentinel-3 Ocean and Land Colour Imager Instrument
Swath 1 440 km
SSI at SSP (km) 300 m
Calibration MERIS type calibration arrangement with spectral calibration using a doped Erbium diffuser plate, PTFE diffuser plate and dark current plate viewed approximately every 2 weeks at the South Pole ecliptic. Spare diffuser plate viewed periodically for calibration degradation monitoring
Detectors Envisat MERIS heritage back-illuminated CCD55-20 frame-transfer imaging device (780 columns by 576 row array of 22.5 ┬Ám square active elements).
Optical scanning design Push-broom sensor. Five cameras recurrent from MERIS dedicated Scrambling Window Assembly (SWA) supporting five Video Acquisition Modules (VAM) for analogue to digital conversion
Spectral resolution 1.25 nm (MERIS heritage), 21 bands.
Radiometric accuracy < 2% with reference to the sun for the 400-900 nm waveband and < 5% with reference to the sun for wavebands > 900 nm. 0.1% stability for radiometric accuracy over each orbit and 0.5% relative accuracy for the calibration diffuser BRDF.
Radiometric resolution < 0.03 W m-2 sr-1 mm-1 (MERIS baseline)
Mass 153 kg
Size 1.3 m3
Design lifetime 7.5 years


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