ESA Sentinel-3 World Fires Atlas Prototype

The Sentinel-3 World Fires Atlas Prototype product has been developed by European Space Agency over the southern countries of the ESA member states, using as input the Sentinel-3A and Sentinel-3B SLSTR Level 1b data containing two dedicated channels (F1 and F2) for fire and high temperature events.

The ESA Sentinel-3 World Fires Atlas Prototype aims to provide continuity to ESA ATSR World Fire Atlas (operating from June 1995 to March 2012) taking on board all the improvements of Sentinel-3 SLSTR instrument.

The processing chain is based on ESA SNAP and GDAL routines hosted in the ONDA Copernicus DIAS.

Two different algorithms, derived from a simplification of the work of Wooster et al. 2012, for day and night time have been developed, implemented and adapted to S3 SLSTR L1b NRT processing constraints.

ACTIVE FIRE EVENTS DURING THE LAST 72 HOURS

Day-Time algorithm
For all valid pixels over land is applied an algorithm based on:

Brightness Temperature of Sentinel-3 Fire channels acquired at nadir (F1_BT_in and F2_BT_in)
Skin Temperature – auxiliary data provided by ECMWF [it is defined as the temperature of the surface at radiative equilibrium. It forms the interface between soil, snow or ice and the atmosphere]
Contextual filters*, mean & standard deviation on 5×5 window, are applied in order to prevent false alarms

Night-Time algorithm
For all valid pixels over land is applied an algorithm based on:

Brightness Temperature of Sentinel-3 Fire channels acquired at nadir (F1_BT_in and F2_BT_in)
Contextual filters* (mean & standard deviation on 5×5 window) are applied in order to prevent false alarms

*Contextual filters derived from a simplification of the work of Wooster et al. 2012

Two dedicated viewer are freely available to the users:

Near Real Time viewer
To visualise fire events occurred in the last 24, 48 or 72 hours on the map and their relative information available at http://s3worldfireatlas.esa.int/viewer. In addition a further option (available from May 2019) will allow the user to define an area of interest and receive a notification if new fires events are detected inside it.

Archive viewer
To visualise, defining a time range, fire events occurred over the southern countries of the ESA member states from 1^st of January 2019 onwards is available at http://s3worldfireatlas.esa.int/archive. These results are based on Sentinel-3 SLSTR Level 1b Non Time Critical products.

ESA intends to process systematically all acquired Sentinel-3A and Sentinel-3B SLSTR Level 1b data from April 2019 onward over the southern countries of the ESA member states (Latitude from 34°N to 60°N; Longitude from 12°W to 31°E) and operate the prototype service up to end of summer.

Please be aware that the Sentinel-3 World Fire Atlas product is a prototype product and you are aware of the consequences of using a prototype that has not been validated.

In order to improve the ESA Sentinel-3 World Fires Atlas Prototype product and service, feedback from users are welcome by email at due@esa.int