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Envisat
ENVISAT Sensors ? MERIS
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The MEdium Resolution Imaging Specrometer Instrument MERIS measures the solar radiation reflected by the Earth, at a resolution of 300m, in 15 spectral bands, programmable in width and position, in the visible and near infra-red.
MERIS allows global coverage of the Earth in 3 days.
The primary mission of MERIS is the measurement of sea colour in the oceans and in coastal areas. Knowledge of the sea colour can be converted into a measurement of chlorophyll pigment concentration, suspended sediment concentration and of aerosol loads over the marine domain, with applications for:
the ocean carbon cycle
the thermal regime of the upper ocean
the management of fisheries
the management of coastal zones
MERIS is also capable of retrieving cloud top height, water vapour total column, and aerosol load over land.
MERIS Product
Levels
Level 1b, Full or Reduced resolution
Annotated engineering data which has been calibrated radiometrically and geolocated. For MERIS this is Top-Of-the-Atmosphere (TOA) calibrated radiances measured in mW/m2 sr nm .
Level 2, Full or Reduced resolution
Contains both geolocated geophysical parameters and surface radiance/reflectance depending on the surface type.
MERIS Product
Types
Full Resolution Quarter Scene (650 x 650 km)
Full Resolution Mini Scene (334 x 334 km)
Reduced Resolution (1,300 km length)
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