Active Fire Detection

//Identify active fire points
//by Tiznger startup co
//www.tiznegar.com

//To increase the accuracy of altitude <3km Or zoom >12
//For Sentinel-2
//Cloud mask

var NGDR = index(B02, B03);
var Inverse = (B02 - 0.2) / (0.5 - 0.2);
//Fire indicator
var SAHM_INDEX = (B12 - B11) / (B12 + B11);

if (Inverse > 1) {
    return [0.5 * B04, 0.5 * B03, 20 * B02];
}

if (Inverse > 0 && NGDR > 0) {
    return [0.5 * B04, 0.5 * B03, 20 * B02];
}

if (SAHM_INDEX > 0.4 || B12 > 1) {
    return [20 * B04, 1 * B03, 1 * B02];
} else {
    return [B04, B04, B04];
}

//Red color indicates active fire areas and points
//The blue range is a cloud mask

Evaluate and Visualize

General description

The script for Sentinel-2 identifies active fire points, offering valuable information for monitoring fire spots in any area. The data output of this script is equivalent to generating an online database of active fire points, such as firms.modaps.eosdis.nasa.gov, but for a smaller range and with a time interval of once every 5 days.

This script is also available for Sentinel-3 SLSTR.