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OLCI/Sentinel-3B L1 Reduced Resolution Top of Atmosphere Reflectance

Metadata Updated: February 21, 2024

The OLCI/Sentinel-3B L1 Reduced Resolution Top of Atmosphere Reflectance product, S3B_OL_1_ERR is generated from the data acquired by the Ocean and Land Colour Instrument (OLCI) on board European Earth Observation satellite mission, SENTINEL-3. The OLCI is a push-broom imaging spectrometer that measures solar radiation reflected by the Earth at a ground spatial resolution of around 300m, over all surfaces, in 21 spectral bands. OLCI is based on the imaging design of ENVISAT's Medium Resolution Imaging Spectrometer (MERIS). It has a 1270km wide swath.

For more information about the instrument and the mission, visit "Sentinel Online" at

The S3B_OL_1_ERR is a Level-1B product. This is composed of an information package map, called a manifest, 22 measurement data files, and seven annotation data files. The 21 measurement data files (one for each band) consist of Top Of Atmosphere (TOA) radiances, calibrated to geophysical units (W.m-2. sr-1 Micro meter-1), georeferenced onto the Earth's surface, and spatially resampled onto an evenly spaced grid. Seven annotation files provide information on illumination and observation geometry, environment data (meteorological data) and quality and classification flags. Both measurement data files and annotation data files are written in netCDF 4 format. The manifest file is in XML format and contains metadata associated with the instrument and the processing. The S3A_OL_1_EFR is generated in Earth Observation (EO) processing mode and all parameters in this product are provided for each re-gridded pixel on the product image and for each removed pixel.

The OL_1_EFR product package is described below:

Element name Description xfdumanifest.xml SENTINEL-SAFE product manifest Radiance for OLCI acquisition bands 01 to 21 Time stamp annotations High resolution georeferencing data Classification and quality flags Low resolution georeferencing data Sun and view angles ECMWF meteorology data Instrument data

note: Oa## represents all the OLCI channels (Oa1 to Oa21).

For more information about the product, read the SENTINEL-3 OLCI User Guide at

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date November 12, 2020
Metadata Updated Date February 21, 2024

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date February 21, 2024
Identifier C1625657679-LAADS
Data First Published 2019-08-01
Language en-US
Data Last Modified 2024-02-13
Category Sentinel-3B, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation European Space Agency. 2018-12-15. OLCI/Sentinel-3B L1 Reduced Resolution Top of Atmosphere Reflectance. Archived by National Aeronautics and Space Administration, U.S. Government, NASA/GSFC/SED/ESD/HBSL/BISB/MODAPS.
Creator European Space Agency
Harvest Object Id 7ac34e79-5e21-49bb-a1d8-8b769954bdcd
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Source Datajson Identifier True
Source Hash 4922cf0c5e31a1ea52bd5b14525e35da54b7b1b01e5b2c935e653e70d7ccea80
Source Schema Version 1.1
Temporal 2018-05-14T23:56:23Z/2024-02-19T00:00:00Z

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