An EME ntenna tower is being built. The acronym EME stands for Earth-Moon-Earth communication.

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EME communication

Radio amateurs are allowed to use only a fraction of power comparing to commertial TV or radio stations.
This means we can send a relatively weak signal to the Moon, which is approximately 300 000 km away from Earth and it takes about one second for the signal to reach the Moon. Only a fraction of the original signal reaches the Moon and then it is scattered to almost all directions by the Moon surface.

 

But a really tiny fraction of it traveles back to Earth as en 'echo' and will eventually reach the Earth but again, it will be diminished to almost nothing. That means if we want to use that 'almost nothing' signal to receive it, to decode it and to write down a mesage it contains on a paper, we have to built special antennas, use very low noise amplifiers, use low loss transmission lines, use computers to decode the signal . . . .

Well, what you see on the picture at left, that is just the beginning of my effort to achieve a successful EME communication.

There are many problems concerning EME communication and they are also very complex. Now, who is there to answer the question 'why'? Why in the age of internet . . . etc., etc. . .  Enybody who can explain why they award gold medals for a javelin throw at olympics when we have available quite efficient machine guns . . .
(So, why somebody insist on throwing a javelin  . . . )

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