3.4.2. Download products

The tab download Download products includes the tools for searching and downloading free remote sensing images. Also, automatic conversion to reflectance of downloaded bands is available.

An internet connection is required and free registration could be required depending on the download service.

This tool allows for searching and downloading:

  • Landsat Satellites images (from 1 MSS to 8 OLI) acquired from the 80s to present days;
  • Sentinel-1 Satellites images (GRD) acquired from 2014 to present days;
  • Sentinel-2 Satellite images (Level-1C and Level-2A) acquired from 2015 to present days;
  • Sentinel-3 Satellite images (OLCI Level-1B OL_1_EFR) acquired from 2016 to present days;
  • ASTER Satellite images (Level 1T) acquired from 2000 to present days;
  • MODIS Products images (MOD09GQ, MYD09GQ, MOD09GA, MYD09GA, MOD09Q1, MYD09Q1, MOD09A1, MYD09A1) acquired from 2000 to present days;
  • GOES Products images (GOES 16 and GOES 17 Full Disk L1b Radiance) acquired from 2017 to present days;

For Landsat, ASTER, and MODIS the search is performed through the CMR Search API developed by NASA. Landsat images are freely available through the services: EarthExplorer USGS , Google Cloud Storage Landsat . The ASTER L1T and MODIS products are retrieved from the online Data Pool, courtesy of the NASA Land Processes Distributed Active Archive Center (LP DAAC), USGS/Earth Resources Observation and Science (EROS) Center, Sioux Falls, South Dakota, https://lpdaac.usgs.gov/data_access/data_pool.

GOES products are downloaded through Amazon AWS Open Data .

For Sentinel-1, Sentinel-2, and Sentinel-3 the search is performed through the Copernicus Open Access Hub (using the Data Hub API ). Sentinel-2 are downloaded from Google Cloud Storage if available.

Please notice that Sentinel products older than 12 months may be archived in Long Term Archives ) and should be requested through the Copernicus Open Access Hub .

This tool attempts to download images first from Amazon Web Services and Google Earth Engine ; only if images are not available, the download is performed through the services that require to login.

3.4.2.1. Login data

_images/login_data.jpg

login_data Login data

3.4.2.1.1. Login https://ers.cr.usgs.gov

For Landsat images USGS EROS credentials (https://ers.cr.usgs.gov) are required for downloads from EarthExplorer . Login using your USGS EROS credentials or register for free at https://ers.cr.usgs.gov/register .

  • User input_text registry_save: enter the user name;
  • Password input_text registry_save: enter the password;
  • checkbox remember: remember user name and password in QGIS;

3.4.2.1.2. Login https://urs.earthdata.nasa.gov

For ASTER and MODIS images EOSDIS Earthdata credentials (https://urs.earthdata.nasa.gov ) are required for download. Login using your EOSDIS Earthdata credentials or register for free at https://urs.earthdata.nasa.gov/users/new . Before downloading ASTER and MODIS images, you must approve LP DAAC Data Pool clicking the following link https://urs.earthdata.nasa.gov/approve_app?client_id=ijpRZvb9qeKCK5ctsn75Tg

  • User input_text registry_save: enter the user name;
  • Password input_text registry_save: enter the password;
  • checkbox remember: remember user name and password in QGIS;

3.4.2.1.3. Login Sentinels

In order to access to Sentinel data a free registration is required at https://scihub.copernicus.eu/userguide/1SelfRegistration (other services may require different registrations). After the registration, enter the user name and password for accessing data.

For searching Sentinel-2 images it is possible to use a service that does not require authentication.

3.4.2.3. Download options

_images/download_options.jpg

download_options_tab Download options

This tab allows for the selection of single bands for Landsat, Sentinel-2, and Sentinel-3 images. Depending on the download service, single band download could be unavailable.

  • checkbox Band X: select bands for download;
  • checkbox Ancillary data: if checked, the metadata files are selected for download;
  • select_all: select or deselect all bands;