Ocean colour resources
Documents relevant to ocean colour (OLCI) services, including Algorithm Theoretical Basis Documents.
31 March 2021
12 November 2020
Summary of the key information needed for an end-user (both general and specialist) to gain a better understanding of the OLCI marine Level 1 (L1) and Level 2 (L2) products.
Algorithm Theoretical Basis Documents
This ATBD contains the description of Sentinel-3 Ocean and Land Colour Instrument (OLCI) Ocean Chlorophyll Index (CI) algorithm.
OLCI Level 2 Algorithm Theoretical Basis Document Bright Pixel Correction (based on ESA Envisat MERIS reprocessing 4)
This ATBD discusses the potential approaches to Bright Pixel Atmospheric Correction.
The confidence check ATBD defines the OLCI classification flags and details of example quality flags that will provide the end users with confidence in the OLCI products.
This ATBD discusses the potential approaches to correct sun glint for OLCI.
Comprehensive description of the OLCI's spectral characteristics and their potential impact on algorithms likely to expect data acquired at a constant wavelength.
Describes the algorithms for the OLCI ocean colour products in Case 1 waters.
Describes the algorithm for the determination of inherent optical properties (IOPs) and the concentration of water constituents in case 2 waters from water leaving radiance reflectance spectra to be used for OLCI.
This document describes the procedures using artificial neural networks (NN) to estimate the uncertainties of the Inherent Optical Properties (IOPs) of water constituents, which are derived fromtop of atmosphere (TOA) radiance data of the Ocean Land Colour Imager (OLCI) on board the earth observing satellite Sentinel-3.
Describes process to establish the OLCI L2 Photosynthetically Active Radiation products.
Describes process to establish the OLCI L2 pixel classification.
Definition of the approach to white cap correction that could be applied to OLCI.
Description of the retrieval of water vapour above from OLCI measurements above land, ocean and clouds.
OLCI Level 2 Algorithm Theoretical Basis Document Correction of the impact of the absorption of atmospheric gases
Describes the impact of the relevant absorption features due to atmospheric gases within the spectral domain of OLCI.
The purpose of this document is to lay out algorithms for the sea water transparency products.
ATBD on pixel-by-pixel uncertainty propagation in OLCI clear water branch.
The purpose of this algorithm is to determine the correction for NIR reflectance needed for the full atmosphere correction model – applied to visible wavelengths.
Describes a procedure to derive the bi-directional water leaving radiance reflectances from top of atmosphere radiance reflectance spectra of OLCI.
The purpose of this document is to lay out the OLCI atmospheric correction algorithm above Case 1 waters.
Science and user support
An inconsistency has been identified in OLCI data around areas of saturation, this user note explains in detail.
The aim of the Copernicus Ocean Colour Database (OCDB) is to provide a platform to collect, organize and make available to the ocean colour community, ocean colour related in-situ measurements, and to ensure long-term stewardship of these critical data.
The document aims to identify and specify the format of Sentinel 3 OLCI products from Level 1
The document aims to identify and specify the format of Sentinel 3 OLCI products from Level 2
This document aims to specify the format of the Sentinel 3 OLCI Level 2 Auxiliary Data Files including the browse processing elements.
In the frame of pre-launch and commissioning activities for Sentinel-3's OLCI-A instrument, Spectral Response Functions (SRF) based on on-ground and inflight characterisation measurements were derived. They are described in this technical note.