Explain in terms of surface accuracy, receiver noise, polarization purity, gain stability, geometric model errors, Atmospheric conditions, Radio Frequency Interference, etc. How these variables affect the performance of the telescope? How to minimize or overcome these factors?

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    $\begingroup$ This feels a little bit like "Write a book chapter for me". A good answer would be way too broad and long for Stack Exchange. You can ask many question, but each one should be answerable in fairly compact and concise answer. Can you narrow this down substantially, and add a bit of explanation of what you understand so far and what parts need clarification? Thanks! $\endgroup$ – uhoh 2 days ago
  • $\begingroup$ Maybe just concentrate on optical imperfections for this question. Surface accuracy is a big challenge for very large dishes that move, and some dishes have secondary hyperbolic reflectors and some even have radio frequency beam lines with dielectric lenses and dichroic mirrors. $\endgroup$ – uhoh 2 days ago

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