🪞 Heliostat Field: Sun Tracking, Receiver Flux and Heat Balance (2D plan view)

Plan view of a 36-mirror heliostat field aiming at a tower receiver. Set latitude, day, solar time, irradiance, haze, mirror reflectivity and wind jitter, and watch tracking, the energy chain from sun to receiver, the flux map and the receiver temperature. Same engine as the 3D page, with four in-page numerical checks.