The Sentinel-3 Technical Guide covers an in-depth description of the Synergy product. The product is a co-registration of images from OLCI and SLSTR. The Synergy product provides continuity to SPOT VGT.

Before reading the Technical Guide, users are advised to read the Sentinel-3 Synergy User Guide which provides a high level description of the product.

Table of contents

• 1 Products and Algorithms
  • 1.1   SYNERGY Algorithms and Products
  • 1.1.1     Level-1 Processing Overview
  • 1.1.1.1       Pre-Processing
  • 1.1.1.1.1         OLCI Retrieval
  • 1.1.1.1.2         SLSTR Retrieval
  • 1.1.1.2       Main Processing
  • 1.1.1.2.1         Extraction of OLCI/SLSTR Imagette Pairs
  • 1.1.1.2.2         Shift Estimation at Ground Control Points
  • 1.1.1.2.3         Deformation Model Estimation
  • 1.1.1.2.4         Collocation Between OLCI Reference Band and All Other Channels
  • 1.1.2     Level-1 Product Description
  • 1.1.2.1       Mis-registration
  • 1.1.3     Level-1 ADFs
  • 1.1.3.1       Processing Control Parameters
  • 1.1.3.2       SYN Level-1 Processing
  • 1.2    Level-2 Algorithms and Products
  • 1.2.1     Level-2 Processing Overview
  • 1.2.1.1       SYN Level-2 Processing - Aerosol and Surface Reflectance Retrieval
  • 1.2.1.1.1         Averaging
  • 1.2.1.1.2         Aerosol Retrieval
  • 1.2.1.1.3         Computation of Aerosol Parameters
  • 1.2.1.2       VGT Continuity
  • 1.2.1.2.1         Band Mapping
  • 1.2.1.2.2         Pixel Flagging
  • 1.2.1.2.3         Projection to Generate P-Products
  • 1.2.1.2.4         Atmospheric Correction
  • 1.2.2     Level-2 Products Description
  • 1.2.2.1       SYN Level-2 Product
  • 1.2.2.1.1         Surface Directional Reflectance
  • 1.2.2.1.2         Aerosol Optical Thickness
  • 1.2.2.1.3         Aerosol Angström Exponent
  • 1.2.2.2       VGT-P Product
  • 1.2.2.2.1         B0, B2, B3 and MIR TOA Reflectance
  • 1.2.2.3       VGK Product
  • 1.2.2.3.1         B0, B2, B3 and MIR Surface Reflectance
  • 1.2.2.3.2         NDVI
  • 1.2.3     Level-2 ADFs
  • 1.2.3.1       Processing Control Parameters
  • 1.2.3.2       SYN Level-2 Processing
  • 1.2.3.3       VGT-P Processing
  • 1.3    VGT-S Algorithms and Products
  • 1.3.1     VGT-S Algorithm Overview
  • 1.3.1.1       Compositing to Generate S1 and S10 Products
  • 1.3.2     VGT-S Products
  • 1.3.2.1       VG1 Product - Surface Reflectance
  • 1.3.2.2       V10 Product
  • 1.3.2.3       NDVI
  • 1.3.3     VGT-S Processing
  • 1.4    Level-2 AOD Algorithms and Products
  • 1.4.1     Algorithm overview
  • 1.4.1.1       Super-pixel processing module
  • 1.4.1.2       Aerosol retrieval module
  • 1.4.1.3       Post-processing module
  • 1.4.2     Level 2 AOD Products Description
  • 1.4.2.1       Surface Directional reflectance
  • 1.4.2.2       Aerosol Optical thickness
  • 1.4.2.3       Single Scattering Albedo
  • 1.4.2.4       Fine-mode aerosol optical depth
  • 1.4.2.5       Aerosol Angstrom parameter
  • 1.4.3     Synergy Level 2 AOD Auxiliary Data Files
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• 2 Validation Activities


• 3 Appendices
  • 3.1 Glossary
  • 3.1 References