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Sentinel 3A Ocean and Land Colour Instrument (OLCI) Reduced Resolution (ERR) level 1 data

Update Frequency: Continual
Latest Data Update: 2020-04-17
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2022-12-19
Download Stats: last 12 months
Dataset Size: 18.92K Files | 4TB


This dataset contains ocean and land colour imagery data from the Ocean and Land Colour Instrument (OLCI) aboard the European Space Agency (ESA) Sentinel 3A Satellite. Sentinel 3A was launched on the 16th February 2016. OLCI is an optical instrument used to provide data continuity for Environmental Satellite (ENVISAT's) Medium Resolution Imaging Spectrometer (MERIS). OLCI is a push-broom imaging spectrometer that measures solar radiation reflected by the Earth. The OLCI radiometer images using 21 spectral bands ranging from 400nm to 1020nm. The Reduced Resolution (ERR) Level 1 data is calibrated, geo-located and spatially re-sampled Top Of Atmosphere (TOA) radiance for all 21 OLCI spectral bands. Reduced Resolution products are obtained by averaging the signal of a grid of 16 FR pixels (4 Along Track x 4 Across Track). For the normal orbit of Sentinel 3A the OLCI instrument provides a Reduced Resolution produced with a spatial resolution of approximately 1.2km with worldwide coverage every ~2 days.

Data are provided by ESA and are made available via CEDA to any registered user.

Citable as:  Copernicus; European Space Agency (2022): Sentinel 3A Ocean and Land Colour Instrument (OLCI) Reduced Resolution (ERR) level 1 data. NERC EDS Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: Sentinel, Ocean and Land Colour Instrument, OLCI


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data collected and prepared by European Space Agency (ESA). Downloaded from the ESA hubs for use by the UK scientific community.

Data Quality:
Data are as given by the data provider, no quality control has been performed by the Centre for Environmental Data Analysis (CEDA).
File Format:
These image files are in NETCDF4 format.

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Instrument/Platform pairings

Sentinel 3 Ocean and Land Colour Instrument (OLCI) Deployed on: Sentinel 3A

Computation Element: 1

Title Level 1 processing algorithm applied to Sentinel 3 Ocean and Land Colour Instrument (OLCI) raw data
Abstract This computation involves the Level 1 processing algorithm applied to raw Ocean and Land Colour Instrument (OLCI) data. This product consists of the physical measurements from the instrument. These are Top Of Atmosphere (TOA) radiances, calibrated to geophysical units (W.m-2. sr-1 µm-1), georeferenced onto the Earth's surface, spatially resampled onto an evenly spaced grid, and annotated with illumination and observation geometry, environment data (meteorological data) and quality and classification flags. The product is available at two spatial resolutions: full resolution and reduced resolution. The processing involves the following steps: 1. Data extraction and quality checks. 2. Radiometric scaling. 3. Stray light correction. 4. Georeferencing. 5. Pixel classification functions. 6. Spatial re-sampling. 7. Product formatting (into the two spatial resolutions) For more information please see the OLCI user guide in the docs tab.
Input Description None
Output Description None
Software Reference None
Output Description


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