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Time-series Stat. Coverage
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Welcome to the Aerosols thematic component of METIS, the EUMETSAT Monitoring and Evaluation of Thematic Information from Space!

METIS Aerosols is the reference quality monitoring platform providing up-to-date diagnostics of the L2 Near Real Time (NRT) Aerosol product derived from Copernicus Sentinel-3 (CS3) operationally generated in less than 2.5 h!

This product is directly generated by the operational processor: Optimized Simultaneous Surface Aerosol Retrieval from Copernicus Sentinel-3 (OSSAR-CS3). OSSAR-CS3 is implemented, maintained, incrementaly evolved and lead autonomously by EUMETSAT, entrusted by the European Commission (EC) and the Copernicus programme.

Current Satellite L2 NRT Sentinel-3 Aerosol Products are from: Sentinel-3 SLSTR-A and -B. Further details are described on the EUMETSAT Operational Algorithm Web page - Copernicus Sentinel-3 NRT Aerosol Optical Depth (AOD) Air quality, long-range transport & threat monitoring of suspended air particles

All analyses are stratified into 27 Regions of interest (ROI).

Latest evolution, Collection 3.1, was released on 5th July 2024.

OSSAR-CS3 is one of the EUMETSAT operational processors contributing to the Copernicus Sentinel-3 NRT Atmosphere portfolio (including Fires, Clouds, Water Vapour). More details available on the EUMETSAT NRT Sentinel-3 Atmospheric Composition Webpage.

For a quick 1-page summary of the latest day result available, click on Quick Dashboard latest day.

Latest available Sentinel-3 A+B SLSTR NRT AOT(550 nm) Lands / Oceans Best Quality :

Sentinel-3 A+B SLSTR NRT AOD(550 nm) (click on image to enlarge) - Spectral Color. For more maps, click here.
Sentinel-3 A+B SLSTR NRT AOD(550 nm) (click on image to enlarge) - Yellow Red Color. For more maps, click here.
NRT S3 Level-2 AOD data monitored in METIS-AOD NRT S3
Satellite L2 AOD Nadir FOV Production (by provider) Cloud & Quality Flags Document, Data Access & Contact  
Sea and Land Surface Temperature Radiometer (SLSTR) - ESA/EUMETSAT
Sentinel-3A SLSTR
Sentinel-3B SLSTR 		~9.5km (nadir)
EXT
1000h (D)
2200h (A)		 27-August-2020 SLSTR L1B Basic cloud mask Link   FTP (test data)   Product manual   Contact
AOD Region of Interest (ROI)
Region of Interest (ROI) - this Monitor
ROI Name Lat range Lon range Importance
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
29
30
31
32
 Global
Atlantic
North_Atlantic
South_Atlantic
Pacific
North_Pacific
South_Pacific
Indian_Ocean
Western Europe
Eastern Europe
East Asia
Korea
India
North America
South America
Africa
South America-Africa
Australia
Siberia
Pacific - North-America - Atlantic
Mediterranea
Amsterdam_Island
SPSG_Gyre
North_Atlantic_Ocean_Only
South_Pacific_Ocean_Only
 88 N - 88 S
70 S - 50 N
0 S - 50 N
70 S - 0 N
70 S - 50 N
0 N - 70 N
70 S - 0 N
70 S - 30 N
35 N - 57 N
33 N - 55 N
10 S - 45 N
32.5 N - 44 N
08 N - 32 N
15 N - 65 N
55 S - 12 N
35 S - 40 N
55 S - 12 N
40 S - 10 S
50 N - 75 N
15 N - 65 N
30 N - 44 N
33 N - 35 N
42 S - 32 S
40 S - 15 S
7 N - 46.5 N
70 S - 0. N
 179 W - 179 E
80 W - 20 E
80 W - 0 W
40 W - 20 W
120 E - 80 W
120 E - 80 W
120 E - 80 W
40 E - 110 E
10 W - 20 E
15 E - 35 E
90 E - 138 E
123.5 E - 131.5 E
65 E - 90 E
125 W - 65 W
85 W - 35 W
20 W - 50 E
85 W - 50 E
110 E - 160 E
40 E - 179 E
179 W - 0 E
10 W - 38 E
24. E - 26. E
 Global
Atlantic
North_Atlantic
South_Atlantic
Pacific
North_Pacific
South_Pacific
Indian_Ocean
Western Europe
Eastern Europe
East Asia
Korea
India
North America
South America
Africa
South America-Africa
Australia
Siberia
Pacific - North America - Atlantic
Mediterranean Basin
Amsterdam_Island
SPSG_Gyre
North_Atlantic_Ocean_Only
South_Pacific_Ocean_Only
OSSAR-CS3 Processor
  1. EUMETSAT Operational Algorithm Web page - Copernicus Sentinel-3 NRT Aerosol Optical Depth (AOD)
    Air quality, long-range transport & threat monitoring of suspended air particles
    Link

  2. Optimized Simultaneous Surface-Atmosphere Retrieval from Copernicus Sentinel-3 (OSSAR-CS3) - Algorithm Theoretical Basis Document (ATBD), EUM/SEN3/DOC/21/1243792 v1, written by Chimot J. et al., September 2021
    Link

L2 Copernicus Sentinel-3 NRT Aerosol Product documentation and links - Collection 2
  1. Optimized Simultaneous Surface-Atmosphere Retrieval from Copernicus Sentinel-3 (OSSAR-CS3) - Product Validation Report (PVR) - EUM/SEN3/REP/21/1244474 v1.a, written by Chimot J. et al., October 2021
    Link

  2. EUMETSAT - Copernicus Sentinel-3 - SLSTR L2 NRT AOD Product Notice - Latest Collection 2 - EUM/SEN3/DOC/21/1249242 v1.a, written by Chimot J. et al., October 2021
    Link

  3. EUMETSAT - Copernicus Sentinel-3 - SLSTR L2 NRT AOD Product Data Format (PDF) Specification, EUM/SEN3/DOC/20/1180730 v1.A, written by Chimot J. et al., June 2020
    Link

  4. EUMETSAT Web News - Release Collection 2
    Link

L2 Copernicus Sentinel-3 NRT Aerosol Product documentation and links - Past Collections / Documents
  1. EUMETSAT - Copernicus Sentinel-3 - SLSTR L2 NRT AOD Product Notice - Collection 1 - EUM/SEN3/DOC/21/1249242 v1.a, written by Chimot J. et al., October 2021
    Link

  2. EUMETSAT Web News - Release Collection 1
    Link

Additional Sentinel-3 and EUMETSAT aerosol references / studies
  1. EUMETSAT WebPage Science studies
    Link

  2. Aerosol for Copernicus EUMETSAT Swansea (ACES)
    Link

  3. SARP: SLSTR AOD retrieval performance
    Link

L2 Copernicus Sentinel-3 Atmospheric portfolio - EUMETSAT Lead
  1. EUMETSAT WebPage Sentinel-3 Atmospheric Composition
    Link

  2. EUMETSAT Operational Algorithm Web page - Copernicus Sentinel-3 NRT Fire Radiative Power (FRP) Radiant heating & threat monitoring of fires, gas flares, and volcanoes
    Link

Additional EUMETSAT/Copernicus Sentinel-3 links
  1. EUMETSAT WebPage SLSTR Level 1B Product notices
    Link

  2. EUMETSAT WebPage SLSTR Level 1B Processing baseline Timeline
    Link

  3. EUMETSAT WebPage - How to get SLSTR data? - EUMETCAST
    Link

  4. EUMETSAT WebPage - How to get SLSTR data? - EUMETSAT Data Centre
    Link

  5. EUMETSAT WebPage - How to get SLSTR data? - EUMETSAT L2 NRT Sentinel-3 Aerosol - Product Navigator
    Link

  6. EUMETSAT WebPage - How to get SLSTR data? - Copernicus Online Data Access (CODA)
    Link

  7. EUMETSAT WebPage - Status of satellites and our data
    Link

1-page Summary - Dashboard OSSAR-CS3 monitoring results of the latest day available - In a nuttschell:

Latest available Sentinel-3 SLSTR-A (left hand side) and SLSTR-B (right hand side) NRT AOD(550 nm) Lands / Oceans Best Quality :

Sentinel-3A SLSTR NRT AOD(550 nm) (click on image to enlarge). For more maps, click here.
Sentinel-3B SLSTR NRT AOD(550 nm) (click on image to enlarge). For more maps, click here.

Latest available Sentinel-3 SLSTR-A (left hand side) and SLSTR-B (right hand side) NRT AOD(550 nm) Global Oceans Monitoring :

Sentinel-3A SLSTR NRT AOD(550 nm) (click on image to enlarge). For more time series, click here.
Sentinel-3B SLSTR NRT AOD(550 nm) (click on image to enlarge). For more time series, click here.

Latest available Sentinel-3 SLSTR-A (left hand side) and SLSTR-B (right hand side) NRT AOD(550 nm) Global Lands Monitoring :

Sentinel-3A SLSTR NRT AOD(550 nm) (click on image to enlarge). For more time series, click here.
Sentinel-3B SLSTR NRT AOD(550 nm) (click on image to enlarge). For more time series, click here.

Latest available Sentinel-3 SLSTR-A (left hand side) and SLSTR-B (right hand side) NRT AOD(550 nm) Global Oceans - Aeronet Validation :

Sentinel-3A SLSTR NRT AOD(550 nm) (click on image to enlarge). For more AERONET validation, click here.
Sentinel-3B SLSTR NRT AOD(550 nm) (click on image to enlarge). For more AERONET validation, click here.

Latest available Sentinel-3 SLSTR-A (left hand side) and SLSTR-B (right hand side) NRT AOD(550 nm) Global Lands - MODIS Terra Validation :

Sentinel-3A SLSTR NRT AOD(550 nm) (click on image to enlarge). For more Terra MODIS validation, click here.
Sentinel-3B SLSTR NRT AOD(550 nm) (click on image to enlarge). For more Terra MODIS validation, click here.
How does it work?

4 series of Plots in the left menu:.

  1. L2 Maps: Daily maps of Sentinel-3 A, B, Constellation A+B, MODIS Terra, Aqua, and VIRIS SNPP SOAR/Db (NASA ALgorithm).

  2. L2 SLSTR Time Series Statistics: Daily statistics dedicated to the sole SLSTR aerosol monitoring: separated A and B, and combined (A+B).

  3. L2 Match-Ups: Strict L2 Match-up (L2 pxiel-based) between SLSTR and MODIS Terra, or SLSTR and AERONET. For details on L2 Match-up protocols, see Optimized Simultaneous Surface-Atmosphere Retrieval from Copernicus Sentinel-3 (OSSAR-CS3) - Product Validation Report (PVR) - EUM/SEN3/REP/21/1244474 v1.a, written by Chimot J. et al., October 2021
    Link

  4. L2 Satellite Intercomparison Time-Series Statistics: Daily statistics of satellite differences, typically SLSTR (A, B or A+B) - XX (XX = MODIS Terra, MODIS Aqua, or VIIRS SNPP DB/SOAR). Generally based on global or regional average comparisons (1st step toward representativeness comparisons).

Understanding the right menu
  • Region of Interest: Visualisations / statistics are given for a list of predefined ROIs. See exact coordinates at Link (ROI).

  • Production Platform:
    TCE_XX = Off-line OSSAR-CS3 processor evrsions - Only used for new developments - testing.
    REF = Internal Sentinel-3 Ground-Segment. In theory, it shall be similar to the public ground-segemnt. In practice, delays are osberved due to regular testing internally at EUMETSAT.
    OPE = The official reference Sentinel-3 Ground-Segment. Public S3 NRT Aerosol products are visible there!

    • Parameter in Daily Maps: most of them are common between all sensors. However, some exceptions exist:
  • - "Land Best" and "Land Ocean Best" => Only valid for S3, PMAP, VIIRS SNPP DB. For MODIS (Terra, Aqua), Click on the last items at bottom (Land DB Best, Land Merged DT/DB, Land Ocean Merged DT/DB).

    • When are the plots updated?
  • The Monitoring and CalVal system behind METIS Aerosols are nearly completely automatized, They run every night. Generally, unless exceptions (processing devlays, new deployments), updates are available within a time windows of 24h.
    • Non-S3 maps:
  • MODIS, VIIRS, PMAP maps are "only" vidible for Production Platform == REF.

    • JAVA features:
  • For some figures, you have to click a couple of times on the item labels (only click on "circles" do not wlays work).
    Under regular debugging.

    • Questions / Comments?
  • Please contact Julien.Chimot@eumetsat.int

    • Region of Interest
    Satellites
    Sensors
    Sentinel-3 Satellites
    Reference Satellites
    Reference
    Parameter of Interest
    Parameter of Interest
    Parameter of Interest
    Parameter of Interest
    Algorithm of Interest
    Algorithm of Interest

    (download png)   (download csv)   (preset range or heuristics)


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