3D plotting of the optical system. The primary reflector in the center, the secondary reflector is on the left, and the horn array is on the right. The system is aligned in the north-south direction, with the secondary to the south and the horns to the north. The positions of the mirrors outlined in gray and black are in the global reference system; the colored position reflect the 7° rotation to account for the pointing of the telescope as described in the text. Horns plotted in salmon colors are in the optimal position.