You basically have the correct answer. The considerations used when setting the size of a radio telescope are: Shortest…
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How Does the Spacing of the Radio Telescopes in the VLA Affect How it Does Scientific Measurements?
I think that our previous answer to the general question about how a radio interferometer works provides an answer…

Are the ALSEP Transmitters on the Moon Still Functional?
You probably found the very thorough summary of the Apollo Lunar Surface Experiments (ALSEP) packages deployed on the surface…

How Does the Spacing Between the Antennas of the VLA Affect the Science it Does?
I think that this question has been answered in the past within the “How Does a Radio Interferometer Work?”…

Simplified Block Diagram Showing How Radio Interferometer Images Are Formed?
I believe that this question has been answered previously at “How Does a Radio Interferometer Work?”. This answer includes…

Two Questions About How Radio Telescopes Work
Regarding your first question, yes, a radio telescope makes measurements of a specific position in the sky. The size…