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Sentinel-5P Aerosol concentrations 340/380 nm

var minVal = -1.0;
var maxVal = 5.0;
var diff = maxVal - minVal;
const map = [
	[minVal, 0x00007f], 
	[minVal + 0.125 * diff, 0x0000ff],
	[minVal + 0.375 * diff, 0x00ffff],
	[minVal + 0.625 * diff, 0xffff00],
	[minVal + 0.875 * diff, 0xff0000],
	[maxVal, 0x7f0000]

const visualizer = new ColorRampVisualizer(map)
function setup() {
   return {
    input: ["AER_AI_340_380","dataMask"],
    output: { bands: 4 }

function evaluatePixel(samples) {
   const [r, g, b] = visualizer.process(samples.AER_AI_340_380);
   return [r, g, b, samples.dataMask];

Evaluate and Visualize


The Aerosol Index (AI) is a qualitative index indicating the presence of elevated layers of aerosols in the atmosphere. It can be used to detect the presence of UV absorbing aerosols such as desert dust and volcanic ash plumes. Positive values (from light blue to red) indicate the presence of UV-absorbing aerosol. This script visualizes AER wavelength pair 340/380 nm.

Description of representative images

High aerosol concentrations over Chad, 2019-07-04. NO2 tropospheric column


Sentinel Online - Level-2 Algorithms - Aerosol Index