Sentinel-3 OLCI - Level 1B Top-of-Atmosphere Radiance

This collection contains Sentinel-3 Level-1 products recorded by the OLCI (Ocean and Land Colour) instrument. The data consist of top-of-atmosphere radiances, ortho-geolocated and re-sampled onto an along-track and across-track grid. The Sentinel-3 mission, jointly operated by ESA and EUMETSAT, is designed as a constellation of two identical polar orbiting satellites, separated by 180°, for the provision of long-term operational marine and land monitoring services.

Sensor: OLCI (Ocean Land Colour Instrument)
Revisit time: <2 days at the equator
Launch date: 16 February 2016
Archiving start date: 29 February 2016
Mission Status: ongoing

Terms and conditions for the use of Sentinel data

Sentinel-3 Mission Overview

Sentinel-3 OLCI Level-1 Products Overview

Spatial resolution of Sentinel-3 Level-1B data:

Radiometric resolution and band numbering:

File format of measurement data: netCDF
Suggested software: ESA SNAP/Sentinel Toolbox (

Sentinel-3 OLCI coverage:

Date of last change

The Sentinel-3 OLCI Level-1 processing is divided into three processing modes. Earth Observation mode deals with Level-0 products to compute radiometric measurements for each OLCI band. Radiometric and spectral calibration processing modes aim to compute calibration coefficients. Please see: for further details.