Sentinel-6 mission is giving the most accurate data of sea level.

Sentinel-6 is a radar satellite which mission is to search the sea level. The mountains which are under the sea are causing small hills on the water. The satellite uses a synthetic aperture system that makes it a very flexible tool.

And that thing uncovers the undersea mountains and valleys. The VLF and ELF radars can also see things under the sea level. And that kind of system can give the information of the bottoms of the ocean.

The multiband radars can give information from the many layers of the ocean. And that system can detect how things like underwater volcanos and earthquakes are releasing the gas from sediments. And how that gas affects the oceans.

The Lidar or laser radar can give very high accurate data of the oceans and things like chemicals in the water. The laser rays can vapor water. And spectrometers can detect what kind of pollution is involved in water.

Those satellites can observe dense water. Which uncovers the underwater pressure waves. The geostationary radar satellites could give early warning of the forming tsunami waves before they reach the coastline. The multisensor satellites can also search for things like changes in temperature of the water and that uncovers the undersea volcano eruptions.

But the thing is the satellites can observe very large areas of the ocean. That makes them effective systems for surveillance operations in civil and military sectors.

The multimission systems allow connecting information from multiple sources. And that thing allows making more accurate tsunami warnings. The undersea earthquakes are causing changes in the behavior of the surface of the water.

But also things like gas and other chemicals can release from the bottom of the sea. While the sediments are shaking. And those things can also give warning of the tsunamis. By connecting the data of the multiple sensors makes it possible to combine the data. And compare the values that radars and chemical sensors are given for things that happen before tsunamis.

https://scitechdaily.com/sentinel-6-mission-returning-most-precise-data-ever-on-sea-level/

https://en.wikipedia.org/wiki/Synthetic-aperture_radar

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