I'm noob in radio astronomy and want to build radio telescope array on rooftop of dormitory in University. Since distance is limited, I decided to emplace several dipole antennas considering below links. https://iopscience.iop.org/article/10.1086/668121/pdf The thing is, I don't have enough knowledgement in here so have no ideas about calculating angular resolutions with more than two antennas. So, It would be very helpful if you give me a expression to calculate such things. And I think I can emplace about 10 antennas and maximum distance between antenna is about 8 km. Is it enough to observate in 20~80MHz with enough accuracy? (arcmin~arcsec ) Thank you.