Sentinel-3A is a satellite launched as part of the European Union's Copernicus program, specifically the Sentinel-3 mission. It is designed to monitor Earth's oceans, land, and atmosphere to support oceanography, climate studies, and environmental monitoring. The primary objective of Sentinel-3A to measure atmospheric temperature and humidity profiles, aerosol distribution, and cloud properties to support weather forecasting, climate research, and air quality monitoring. This satellite also monitor land surface temperature, vegetation health, and land cover changes for agriculture, forestry, and land management applications.