Operational 2002+ On Eumetsat
Envisat 5 years in orbit - On the 1st of March 2007 Envisat has successfully reached its nominal 5-years mission lifetime. The satellite is in good health despite a few anomalies. Except for a short period in the fall 2006, the capacity of Artemis is fully exploited for download of large volumes of data. The services on-ground have been continuously enhanced, in particular through the implementation of the Multi-Mission infrastructure and setting-up of new data access capabilities.
On the occasion of the Envisat 5th anniversary, we are pleased to announce the provision of new products free of charge accessible by all Category-1 users on Internet: ASAR Medium Resolution products (i.e. WSM, IMM, APM), global coverage MERIS Full Resolution Level 1 products (MER_FRS_1P), European coverage Both sets of products are systematically generated following data acquisition and are made available via the Envisat Rolling Archive (RA) and the Envisat Web File Server (EWFS) with a two-week retention time. We also remind you that the following datasets are available on Internet, free of charge: The NRT and archived MERIS RR Level 1 and Level 2 products, via DDS, MERCI and RA/EWFS (missing period Nov. 2005 to June 2006) The NRT AATSR Level 1 and Level 2 products, via DDS or RA/EWFS The atmospheric chemistry instruments (SCIAMACHY, MIPAS, GOMOS) consolidated products The new RA-2 consolidated Level 2 products In order to get access to the above datasets, existing Cat-1 users shall send their request to the Earth Observation Help Desk Team, specifying under which project the data will be used. New Cat-1 users shall use the fast registration procedure on the EOPI web site. In the case of ASAR HR and MERIS FR, please note that this procedure only applies for access to systematic productions and not to place programming requests which require instead the submission of a full proposal.
Satellite Instruments
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.
Measurment Typesatellite instrument
Platform TypeImaging multi-spectral radiometers (vis/IR)
OrbitLEO Polar
Spectral Coverage390 to 1040 nm
Scan Patternpushbroom w/linear CCD
VariablesOcean and Coast (Ocean Colour/Biology) Land (Vegetation) Atmosphere (Clouds,Precipitation)
Repeat Time
Wavelength to
Number of Bands
Temporal Coverage
Swath Width
Resolution 1
Resolution 2
Resolution 3
Resolution 4
Technical Characteristics Accuracy 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 Waveband VIS-NIR: 15 bands selectable across range: 390 nm to 1040 nm (bandwidth programmable between 2.5 and 30 nm)
3 Sep 2009 13:47