description Sentinel-3A Overview
Sentinel-3A is an Earth-observation satellite operated as part of the European Union's Copernicus program, with the European Space Agency responsible for its development. Launched in 2016, it measures sea-surface topography, ocean and land temperature, and the color of oceans and land. Its data support environmental monitoring, climate research, ocean forecasting, and management of terrestrial and marine resources.
help Sentinel-3A FAQ
What is the Sentinel-3A satellite used for?
Launched in 2016, the Earth-observation satellite is specifically designed to measure sea-surface topography, ocean and land surface temperature, and the color of the oceans. It provides critical data for maritime forecasting and environmental monitoring.
Who operates the Sentinel-3A satellite?
The spacecraft is operated as part of the European Union's Copernicus program, with the European Space Agency (ESA) responsible for its actual development. It was successfully launched from the Plesetsk Cosmodrome in Russia.
How does Sentinel-3A measure the height of the ocean surface?
The satellite uses a specialized radar altimeter instrument to precisely map the topography of the sea surface. By constantly bouncing radar pulses off the water, it can measure subtle changes in sea level related to ocean currents and climate change.
Are there other satellites in the Sentinel-3 program?
Yes, Sentinel-3A was joined in orbit by its identical twin satellite, Sentinel-3B, which launched in 2018. Flying in a coordinated constellation, the two satellites provide continuous, high-repeat coverage of the entire planet.
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