The Sentinel-3 Technical Guide covers an in-depth description of the mission's products and algorithms as well as details on the OLCI instrument and its performance.

Before reading the Technical Guide, users are advised to have read the Sentinel-3 User Guide for a high level description of the available instrument modes and products.

Table of contents

• 1 Products and Algorithms
  • 1.1 Level-0 Algorithms and Products
  • 1.1.1 Processing Overview
  • 1.1.2 Level-0 Products Description
  • 1.1.2.1 Earth Observation Mode - Instrument Source Packets
  • 1.1.2.2 Calibration Mode
  • 1.2 Level-1 Algorithms and Products
  • 1.2.1 Processing Overview - Calibration Mode
  • 1.2.2 Processing Overview - Earth Observation Mode
  • 1.2.2.1 Data Extraction and Quality Checks
  • 1.2.2.2 Radiometric Scaling
  • 1.2.2.3 Stray Light Correction
  • 1.2.2.4 Georeferencing
  • 1.2.2.5 Pixel Classification Functions
  • 1.2.2.6 Spatial Re-Sampling
  • 1.2.3 Level-1B Products Description
  • 1.2.3.1 Earth Observation mode - FR or RR TOA Radiances
  • 1.2.3.2 Calibration Mode
  • 1.2.3.2.1 Radiometric Calibration Mode
  • 1.2.3.2.2 Spectral Calibration Mode
  • 1.2.4 Level-1 ADFs
  • 1.2.4.1 Processing Control Parameters
  • 1.2.4.2 OLCI Level-1 Processing - Earth Observation
  • 1.3 Level-2 Algorithms and Products
  • 1.3.1 Processing Overview
  • 1.3.1.1 Pre-Processing
  • 1.3.1.1.1 Radiance to Reflectance Conversion
  • 1.3.1.1.2 Pixel Classification
  • 1.3.1.1.3 Gas Correction
  • 1.3.1.1.4 Smile Correction
  • 1.3.1.1.5 Water Vapour Retrieval
  • 1.3.1.2 Ocean Processing
  • 1.3.1.2.1 Baseline Atmospheric Correction
  • 1.3.1.2.2 Alternative Atmospheric Correction (Neural Network)
  • 1.3.1.2.3 OC4Me Chlorophyll
  • 1.3.1.2.4 IMT Neural Net
  • 1.3.1.2.5 Transparency Products
  • 1.3.1.2.6 PAR Products
  • 1.3.1.3 Land Processing
  • 1.3.1.3.1 OLCI Global Vegetation Index
  • 1.3.1.3.2 OLCI Terrestrial Chlorophyll Index
  • 1.3.2 Level-2 Products Description
  • 1.3.2.1 Ocean Products
  • 1.3.2.1.1 Water-Leaving Reflectance
  • 1.3.2.1.2 CDM Absorption Coefficient
  • 1.3.2.1.4 Algal Pigment Concentration
  • 1.3.2.1.5 Total Suspended Matter Concentration
  • 1.3.2.1.6 Diffuse Attenuation Coefficient
  • 1.3.2.1.7 Photosynthetically Active Radiation
  • 1.3.2.1.8 Aerosol Optical Thickness
  • 1.3.2.1.9 Aerosol Angström Exponent
  • 1.3.2.1.10 Integrated Water Vapour Column Over Water
  • 1.3.2.1.1 Quality and Science Flags
  • 1.3.2.2 Land Products
  • 1.3.2.2.1 OLCI Global Vegetation Index (faPAR)
  • 1.3.2.2.2 Rectified Reflectance
  • 1.3.2.2.3 OLCI Terrestrial Chlorophyll Index
  • 1.3.2.2.4 Quality and Science Flags
  • 1.3.2.2.5 Integrated Water Vapour Column Over Land
  • 1.3.3 Level-2 ADFs
  • 1.3.3.1 Processing Control Parameters
  • 1.3.3.2 Common Processing Parameters
  • 1.3.3.3 Ocean Processing Parameters
  • 1.3.3.4 Land Processing Parameters
• 2 Instrument
  • 2.1 Description
  • 2.2 Calibration
  • 2.3 Specifications
  • 2.4 Spectral Response Function data
  • 2.5 Quality Reporting
• 3 Calibration and Validation Activities
  • 3.1 Calibration
  • 3.2 Validation
• 4 Appendices
  • 4.1 Glossary
  • 4.2 References