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The Sentinels are a suite of satellite missions developed to serve the operational needs of the European Copernicus program for Earth observations. NOAA CoastWatch/OceanWatch provides Sentinel data to US users through official arrangements with ESAEUMETSAT and the European Commission.

Sentinel-3 is a multi-instrument mission to measure sea- and land-surface temperature, ocean and land color and sea-surface topography. Sentinel-3A was launched on 16 February 2016. Sentinel 3B was launched successfully on 25 April 2018 with the same instruments.

The Ocean and Land Colour Instrument (OLCI) is based on heritage from Envisat’s Medium Resolution Imaging Spectrometer (MERIS to measure visible and thermal infrared radiances, i.e., true color, ocean color and derived parameters such as chlorophyll, total suspended matter (TSM), diffuse attenuation coefficient at 490 nm (Kd(490)), absorption at 443 nm (a(443). OLCI has 21 bands at wavelengths from 400 nm to 1020 nm (400, 412, 442, 490, 510, 560, 620, 665, 674, 681, 709, 754, 779, 865, 885, 1024 nm), a spatial resolution of 300 m and a swath width of 1270 km.

See the ESA Sentinel-3 website♦ for more information: http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinel-3/Introducing_Sentinel-3

OLCI Level 1b (e.g., true color) and ocean color Level 2 data (e.g., radiances, chlorophyll, etc.) are generated by EUMETSAT(https://www.eumetsat.int/website/home/Data/Products/Ocean/index.html♦) and served by CoastWatch. CoastWatch also generates L3 mapped products for US Coastal regions.

See the EUMETSAT ocean data product pages for more information and links to specific documents: https://www.eumetsat.int/website/home/Data/Products/Ocean/index.html

(♦ - non-government website)

KeyDescription
Platform/Sensor

Sentinel-3 / OLCI

Measurement/Products

true color

DOI

n/a

Short Name

OLCI True Color

Sample Filename

S3A_OL_1_EFR____20160831T093739_20160831T094039_20160831T114446_*.SEN3.tar
OLCLCW.I2017158.153647.true300.hdf

Dataset Type

n/a

Processing Level

Level-1B

Spactial Coverage

Global

Temporal Coverage

Near real-time data beginning:

Level-1 released 20 October 2016

Latency

8 hours

Resolution

300 m

Projection

Swath

Swath Width

1270 km

Sample Frequency

n/a

Temporal Repeat

Orbital27 days

Orbital Period

101 minutes

Orbit

Sun-synchronous (polar-orbiting), altitude 814.5 km, inclination 98.65

Equator crossing time at 10:00

Data Provider

NOAA CoastWatch/OceanWatch courtesy of Copernicus Program

Formats

NetCDF (tar file), HDF, PNG

Keywords

True Color, OLCI, Sentinel-3A, Copernicus, global, polar-orbiting