This page summarises MERIS L1b and L2 user products. The complete MERIS Full Resolution and Reduced Resolution archives have been fully reprocessed with same processor configuration (MEGS 9) and are available to users since 2020 (Full and Reduced Resolution).

MERIS Technical Documents - Documentation applicable to the processors MEGS 9 used for the 4th reprocessing.

MERIS 4th data reprocessing documentation

• MERIS 4th data reprocessing - Evolutions and Validation report
• MERIS 4th data reprocessing - L1 and L2 Product Format Specification
• MERIS 4th data reprocessing - Validation and intercomparison with MERIS 3rd data reprocessing (by the MERIS Validation Team)
• Algorithm Theoretical Basis Documents – ATBD
• Read Me File

Reference Model and Radiative Transfer Model description for MERIS Level 2 processing

• Reference Model for MERIS Level 2 Processing - Third MERIS reprocessing: Ocean Branch
• Ocean RMD Reference Model for MERIS Level 2 Processing
• Specification of the scientific contents of the MERIS L1b & L2 Auxiliary Data Products
• Specification of the scientific contents of the MERIS Radiative Transfer Tools used to generate the L2 Auxiliary Data Products
• MERIS instrument calibration, Ludovic Bourg and Steven Delwart, 2012

MERIS Product Quality Reporting

• MERIS FR - QUALITY ASSESSMENT
• MERIS RR - QUALITY ASSESSMENT
• MERIS Cyclic Reports
• MERIS spectral campaign documentation - unavailability of nominal data
• MERIS Smile Effect Characterization and Correction
• MERIS Absolute Geolocation Status
• MERIS Wavelength and Irradiances Model
• MERIS nominal Spectral Response Functions: centered at nominal wavelengths with camera-averaged widths
  Nominal Spectral Response Functions (SRFs) computed from MERIS Spectral Model 2004 - the official one for 2nd and 3rd reprocessings - but forcing central wavelengths to their theoretical values, hence compatible with the Level 2 processing algorithms and look-up-tables. Spectral characteristics used to compute the SRFs other than response centering, namely those defining the SRF of individual CCD cells, have been obtained by averaging over cameras.

Historical Documents

• MERIS Instrument Processing Facility (IPF) Evolution
• Payload to Ground Interface Document (PGICD) (on request)
• MERIS Commissioning phase - MERIS Commissioning plan
• GAEL-P179-TCN-006-01-0 MERIS Absolute Geolocation Status
• MERIS 2nd data reprocessing documentation
  • MERIS 2nd reprocessing: changes description
  • MERIS Products Quality Status Report MEGS7.4 and IPF5
  • DPM, ATBD and product specification (on request)
• MERIS 1st data reprocessing documentation
  • First 2003 MERIS Data Archive Reprocessing

Instruments & Application

• MERIS The Medium Resolution Imaging Spectrometer - Special Publication
• MERIS - A New Generation of Ocean-Colour Sensor onboard Envisat - Bulletin