This question has actually come-up several times over the years. Perhaps the answer to How to Make Images with…
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How is the “Picture” of the Sagittarius A* Black Hole Made From Radio Telescope Observations?
By combining the signals from multiple telescopes radio astronomers are able to produce images or “pictures”, such as the…

Can One Build a Radio Interferometer in One’s Back Yard?
I guess it depends upon how big your back yard is! There is a nice Bachelor’s degree thesis from…

Radio Frequency Interference and Spectrum Management
As you can imagine given the number of interested parties that rely on both transmission and reception of electromagnetic…

Are There Audio Recordings of Stars?
All radio astronomical measurements collect electromagnetic signals and record them. Note that the signals measured are not sound waves,…

What are the Different Parts of a Radio Telescope?
You can find a very nice description of the different parts of a radio telescope in NRAO’s radio astronomy…