Minimize Radiometric Resolution - 21 bands in VIS/SWIR

OLCI observation is performed simultaneously in 21 spectral bands, listed in the table below, ranging from the visible to the near-infra-red (400 nm to 1 020 nm). Each of these bands is programmable in position and width.

Band λ centre (nm) Width (nm) Function
Oa1 400 15 Aerosol correction, improved water constituent retrieval
Oa2 412.5 10 Yellow substance and detrital pigments (turbidity)
Oa3 442.5 10 Chl absorption max., biogeochemistry, vegetation
Oa4 490 10 High Chl, other pigments
Oa5 510 10 Chl, sediment, turbidity, red tide
Oa6 560 10 Chlorophyll reference (Chl minimum)
Oa7 620 10 Sediment loading
Oa8 665 10 Chl (2nd Chl abs. max.), sediment, yellow
substance/vegetation
Oa9 673.75 7.5 For improved fluorescence retrieval and to better
account for smile together with the bands 665 and 680 nm
Oa10 681.25 7.5 Chl fluorescence peak, red edge
Oa11 708.75 10 Chl fluorescence baseline, red edge transition
Oa12 753.75 7.5 O2 absorption/clouds, vegetation
Oa13 761.25 2.5 O2 absorption band/aerosol corr.
Oa14 764.375 3.75 Atmospheric correction
Oa15 767.5 2.5 O2A used for cloud top pressure, fluorescence over land
Oa16 778.75 15 Atmos. corr./aerosol corr.
Oa17 865 20 Atmos. corr./aerosol corr., clouds, pixel co-registration
Oa18 885 10 Water vapour absorption reference band. Common reference
band with SLSTR instrument. Vegetation monitoring
Oa19 900 10 Water vapour absorption/vegetation monitoring
(max. reflectance)
Oa20 940 20 Water vapour absorption, atmos./aerosol corr.
Oa21 1 020 40 Atmos./aerosol corr.

Table 1: Band characteristics of the SENTINEL-3 Ocean and Land Colour Instrument (OLCI).