MERIS is a programmable, medium-spectral resolution, imaging spectrometer operating in the solar reflective spectral range. Fifteen spectral bands can be selected by ground command.
The instrument scans the Earth's surface by the so called "push-broom" method. Linear CCD arrays provide spatial sampling in the across-track direction, while the satellite's motion provides scanning in the along-track direction.
MERIS is designed so that it can acquire data over the Earth whenever illumination conditions are suitable. The instrument's 68.5° field of view around nadir covers a swath width of 1150 km. This wide field of view is shared between five identical optical modules arranged in a fan shape configuration.
Imaging multi-spectral radiometers (vis/IR)
Ocean colour bands typical S:N = 1700
Ocean: 1040m x 1200 m, Land & coast: 260m x 300m
1150km, global coverage every 3 days
VIS-NIR: 15 bands selectable across range: 390 nm to 1040 nm(bandwidth programmable between 2.5 and 30 nm)
Land ( Vegetation ), Ocean and Coast ( Ocean Colour/Biology ), Atmosphere ( Clouds/Precipitation )
Latest Mission Operations News
13 February 2015
The systematic bulk processing of the MERIS Level 2 Full Resolution Full Swath dataset has been completed, and the FRS Level 2 products (MER_FRS_2P) have been made available to users on the ESA centralised dissemination server together with the previously released MERIS FRS Level 1 data (MER_FRS_1P).
The MERIS FRS online dataset now comprises the complete FRS Level 1 and Level 2 data archive for the entire Envisat mission spanning from 17 May 2002 to 08 April 2012.
Related Data Types
Related (Key) Documentation