Filippo Biondi

It's concrete.

and so and so synthetic synthetic it means that we have to when we watch something when we do a snapshot of the earth using electromagnetic waves so coherent electromagnetic waves we have to resolve two dimensions the range and the azimuth

I take it easy.

The range you resolve it by the electromagnetic bandwidth.

So more bandwidth you have allocated, the more resolution you have.

The resolution is the ability to see and to watch details of a picture.

okay the problem is the azimuth in order to synthesize a high resolution of the ground in the azimuth direction you need to synthesize a huge antenna in this in the space an antenna that can be long

50 kilometers 60 kilometers the more long is the antenna the the the better is the azimuth resolution on your pictures okay

So how you can build a so huge antenna in this space is impossible.

So you use small pieces of the physical antenna of the radar and you synthesize a virtual antenna in the space.

A virtual antenna?

A virtual antenna, yes.

And so the name is Synthetic Average Radar, okay?

In order to do this, you need an important physical aspect that rises up because of the high velocity that is called the Doppler effect.

The Doppler effect, what it is?

Acoustics.

So the azimuth direction is resolved by the sound, music, the sound, that is encapsulated inside the returned electromagnetic waves, and so you have the picture, this image.

What we did in our technique, in our technology?

We find a method to retrieve tiny vibrations of the surface of the Earth, and those vibrations

are coming back from what there is underground Earth.