{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Sentinel-2 MSI Level 2A - Composite Imagery, Normalized Burn Ratio and Burn Severity"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"```{hint} \n",
"Execute the notebook on the training platform >>\n",
"```"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"This notebook provides you an introduction to data from the [Sentinel-2 MultiSpectral Instrument (MSI)](https://sentinel.esa.int/web/sentinel/missions/sentinel-2/instrument-payload), which has has 13 spectral bands which provide data for land cover/change classification, atmospheric correction and cloud/snow separation. This notebook demonstrates several ways that Level 2A data from Sentinel-2 can be used, including the creation of composite imagery, calculation of a burn index and burn severity mapping. \n",
"\n",
"The events featured in this notebook are the wildfires in Italy and Greece in summer 2021. The image below shows the active burning on the Evia island of Greece on 8 August 2021, recorded by the Sentinel 2 MSI."
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"```{figure} img/20210809_EviaWildfire.jpg\n",
":width: 70%\n",
":name: Wildfires on the island of Evia, Greece in August 2021\n",
"Wildfires on the island of Evia, Greece in August 2021 (Source: Copernicus)\n",
"``` "
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"``` {admonition} Basic Facts\n",
"**Spatial resolution**: `10 m, 20m and 60m`
\n",
"**Spatial coverage**: `Near global`
\n",
"**Revisit time**: `5 days at the equator`
\n",
"**Data availability**: `since 2015`\n",
"```"
]
},
{
"cell_type": "markdown",
"metadata": {
"tags": []
},
"source": [
"``` {admonition} How to access the data\n",
"Sentinel-2 Level 2A data can be obtained via the Copernicus Open Access Hub and are disseminated as `.zip archives` when downloaded. You need to register for an account before downloading data.\n",
"\n",
"The data when unzipped, are in \"SENTINEL-SAFE format, including image data in JPEG2000 format, quality indicators (e.g. defective pixels mask), auxiliary data and metadata.\" Learn more about the data format here.\n",
"```"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"