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Instrument image

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.

Not Operational
Imaging multi-spectral radiometers (vis/IR)
Technical Characteristics
Ocean colour bands typical S:N = 1700
Spatial Resolution:
Ocean: 1040m x 1200 m, Land & coast: 260m x 300m
Swath Width:
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)
Earth Topics
Land ( Vegetation ), Ocean and Coast ( Ocean Colour/Biology ), Atmosphere ( Clouds/Precipitation )
Available Resources Type Access
Related Links General Reference link
MERS Instrument calibration Technical Document download
MERIS FAQ Technical Document link
MERIS and (A)ATSR Workshop 2005 Proceedings link
Reference Model for Meris Level 2 Processing Product Document link
Products Specifications Product Document link
MERIS Algorithm Theoretical Basis Document Technical Document link
Annex A - Product Data Conventions Product Document download
Minimize Latest Mission Operations News

Complete Envisat MERIS FRS L1/L2 dataset available online

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.