Sentinel-1
The Copernicus Sentinel-1 mission is designed as a two-satellite constellation. Each satellite carries an advanced radar instrument to provide an all-weather, day-and-night supply of imagery of Earth’s surface. The mission ended for Sentinel-1B in 2022.
Sources
European Space Agency (ESA). Sentiel-1. https://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentine…