OC4Me

Ocean Color - Near Real Time - OLCI Sentinel-3A and 3B Regional Coverage

jebidiah.jeffery — Thu, 17 Mar 2022 14:29:30 +0000

Ocean Color - Near Real Time - OLCI Sentinel-3A and 3B Regional Coverage

OLCI Sentinel-3A and 3B regional coverage (US coasts of interest, a.k.a. "CONUS" but including Hawaii) Level-3 mapped daily composites of ocean color remote sensing reflectances (Rrs(λ), chlorophyll-a concentration and derived water quality related products including diffuse attenuation coefficient at 490 nm (Kd490), normalized fluorescence line height (NLFH), and total suspended matter (TSM) from the EUMETSAT processing.

jebidiah.jeffery Thu, 03/17/2022 - 10:29

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 ESA, EUMETSAT 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 launched on 25 April 2018 with the same suite of 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 with which to generate true color, ocean color radiances and derived products such as chlorophyll, total suspended matter (TSM), diffuse attenuation coefficient at 490 nm (Kd(490)), absorption at 443 nm (a(443), and normalized fluorescence line height (nflh). 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 (at nadir) and a swath width of 1270 km.

CoastWatch distributes EUMETSAT native products (L2) also generates and serves mapped and composited products (L3) for US Coastal regions ("CONUS") and global sectors. Global sectors are "hi-res" 300 m 216 sectors (AA through RL, Figure 1) and "VIIRS-res" 750 m 24 sectors which match VIIRS ocean color (Figure 2). See the data access tab for product listings and links.

Figure 1. CoastWatch hi-res OLCI Sentinel-3 sector coordinate map

Figure 2. CoastWatch VIIRS-res sector coordinate map

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/sentinel-3) and served by CoastWatch

See the EUMETSAT ocean data product pages for more information and links to specific documents: https://www.eumetsat.int/sentinel-3

Product Families

Ocean Color

Measurements

Chlorophyll-a Concentration

Diffuse Attenuation Coefficients

Normalized Fluorescence Line Height

Remote Sensing Reflectance

Suspended Particulate Matter

Processing Levels

Level 3

Spatial Coverage

CoastWatch US Regions

Latency Groups

0 Hours <= 24 Hours (NRT)

Latency Details

8 hours

Spatial Resolution Groups

100m < 2km

Spatial Resolution Details

300 m

Platforms

Sentinel-3

Instruments

OLCI

Processing Algorithms

OC4Me

Data Providers

EUMETSAT

NOAA

NESDIS

STAR

CoastWatch

Data Tool Links

CoastWatch Near Real-Time Searches

L3 CoastWatch CONUS Regional Data

HTTPS

CoastWatch Level-3 Mapped Regions for chlorophyll, Kd490, Rrs665 and Rrs681 (example dataset ~March to June 2019):

Sentinel-3A:

https://coastwatch.noaa.gov/pub//socd7/coastwatch/products/olci/s3a/regional/

Sentinel-3B:

https://coastwatch.noaa.gov/pub//socd7/coastwatch/products/olci/s3b/regional/

THREDDS

OLCI Sentinel 3A and Sentinel 3B near real time, CONUS Regions, ocean color (from EUMETSAT native L2)

https://coastwatch.noaa.gov/thredds/socd/coastwatch/catalog_coastwatch_olci_conus.html

Rrs (400 nm, 412 nm, 442 nm, 490 nm, 510 nm, 560 nm, 620 nm, 665 nm, 674 nm, 681 nm, 709 nm, 754 nm, 779 nm)

https://coastwatch.noaa.gov/thredds/socd/coastwatch/catalog_olci_s3b_hires_sector_nlw_daily.html

Ocean Color - Near Real Time - OLCI Sentinel-3A and 3B Global Coverage

jebidiah.jeffery — Thu, 17 Mar 2022 14:28:58 +0000

Ocean Color - Near Real Time - OLCI Sentinel-3A and 3B Global Coverage

OLCI Sentinel-3A and 3B global coverage ocean color including visible remote sensing reflectances and derived parameters such as chlorophyll-a concentration and light attenuation coefficients.

jebidiah.jeffery Thu, 03/17/2022 - 10:28

Figure 1. CoastWatch hi-res OLCI Sentinel-3 sector coordinate map

Figure 2. CoastWatch VIIRS-res sector coordinate map

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/sentinel-3) and served by CoastWatch.

See the EUMETSAT ocean data product pages for more information and links to specific documents: https://www.eumetsat.int/sentinel-3

Short Names

OLCI Ocean Color

Temporal Start Date

October 20, 2016

Product Families

Ocean Color

Measurements

Chlorophyll-a Concentration

Diffuse Attenuation Coefficients

Remote Sensing Reflectance

Processing Levels

Level 2

Level 3

Spatial Coverage

Global

CoastWatch US Regions

Latency Groups

0 Hours <= 24 Hours (NRT)

Latency Details

8 hours

Spatial Resolution Groups

100m < 2km

Spatial Resolution Details

300 m

Platforms

Sentinel-3

Instruments

OLCI

Processing Algorithms

OC4Me

Data Providers

Copernicus

NOAA

NESDIS

STAR

CoastWatch

Data Tool Links

CoastWatch Data Portal:

CoastWatch Granule Selector Tool

OLCI L1/L2

CoastWatch Data Search

L2 Data

CoastWatch Near Real-Time Search

Sample Filenames

S3A_OL_1_EFR____20160831T093739_20160831T094039_20160831T114446_*.SEN3.tar
S3A_OL_2_WFR____20170823T154032_20170823T154332_20170823T174158_0179_021_225_2520_MAR_O_NR_002.SEN3.tar
OLCQCW_I2017234_160343_FL03_closest_[chlora,kd490,...].hdf

HTTPS

CoastWatch Global Level-3 chlorophyll, Kd490, and nLw:

Sentinel-3A:

https://coastwatch.noaa.gov/data/pub0017/coastwatch/products/olci/s3a/global/chlora/daily/WW00

https://coastwatch.noaa.gov/data/pub0017/coastwatch/products/olci/s3a/global/kd/daily/WW00

https://coastwatch.noaa.gov/data/pub0017/coastwatch/products/olci/s3a/global/nlw/daily/WW00

Sentinel-3B:

https://coastwatch.noaa.gov/data/pub0017/coastwatch/products/olci/s3b/global/chlora/daily/WW00

https://coastwatch.noaa.gov/data/pub0017/coastwatch/products/olci/s3b/global/kd/daily/WW00

https://coastwatch.noaa.gov/data/pub0017/coastwatch/products/olci/s3b/global/nlw/daily/WW00

THREDDS

Link for OLCI Sentinel 3A and Sentinel 3B near real time, global, ocean color (from EUMETSAT native L2)

Top Level Catalog

Sentinel 3A

Hi-res (300 m) global sectors mapped daily merge (216 sectors, AA through RL; see hi-res 300m OLCI sector map )

Chlorophyll
Kd 490
Rrs (400 nm, 412 nm, 442 nm, 490 nm, 510 nm, 560 nm, 620 nm, 665 nm, 674 nm, 681 nm, 709 nm, 754 nm, 779 nm)

VIIRS-res (750 m) global sectors mapped daily merge (24 sectors to match VIIRS sectors; see 750m OLCI sector map )

Chlorophyll
Kd 490
Rrs (400 nm, 412 nm, 442 nm, 490 nm, 510 nm, 560 nm, 620 nm, 665 nm, 674 nm, 681 nm, 709 nm, 754 nm, 779 nm)

Global 4 km mapped daily merge (1 file per day)

Chlorophyll
Kd 490
Rrs (400 nm, 412 nm, 442 nm, 490 nm, 510 nm, 560 nm, 620 nm, 665 nm, 674 nm, 681 nm, 709 nm, 754 nm, 779 nm)

Sentinel 3B

Hi-res (300 m) global sectors mapped daily merge (216 sectors, AA through RL; see hi-res 300m OLCI sector map )

Chlorophyll
Kd 490
Rrs (400 nm, 412 nm, 442 nm, 490 nm, 510 nm, 560 nm, 620 nm, 665 nm, 674 nm, 681 nm, 709 nm, 754 nm, 779 nm)

VIIRS-res (750 m) global sectors mapped daily merge (24 sectors to match VIIRS sectors; see 750m OLCI sector map)

Chlorophyll
Kd 490
Rrs (400 nm, 412 nm, 442 nm, 490 nm, 510 nm, 560 nm, 620 nm, 665 nm, 674 nm, 681 nm, 709 nm, 754 nm, 779 nm)

Global 4 km mapped daily merge (1 file per day)

Chlorophyll
Kd 490
Rrs (400 nm, 412 nm, 442 nm, 490 nm, 510 nm, 560 nm, 620 nm, 665 nm, 674 nm, 681 nm, 709 nm, 754 nm, 779 nm)

S-3A/B OLCI Sector maps of 300m and 750m sectors:

Select a sector and the corresponding THREDDS links will display below the 300m sector map.

ERDDAP

S-3A and S-3B OLCI mapped to 750m Sectors:

Chlorophyll-a