📡 Radio Interferometer: UV Coverage, Dirty Beam and Earth Rotation Synthesis (2D)

Place three to twelve antennas in a line, a Y, a ring or at random and watch the baselines fill the uv plane as the Earth turns. The synthesized dirty beam, its half-power width, the highest sidelobe and the dirty image of two point sources are computed as a Fourier sum of the visibilities, so you can see when the pair is resolved and when it blurs into one. Fringe nulls, the filled-aperture beam, baseline counting and the uv ellipse are checked numerically, with four in-page numerical checks.