Response function of the beams, integrated in RA, for selected columns (corresponding to a declination range) and different horn arrangements. Results are normalized to the response of the central horn, according to Eq. (11). For the triple-rectangular and double-rectangular arrangements, the beam average also took into account the five displacements of 0, ±15 cm, ±30 cm. For the rectangular arrangement, the five displacements were 0, ±21 cm, ±42 cm. This averaging produces an even smoother profile for the arrangements. We note that it is possible to change the orientation of the above figures on the sky by changing the north-south orientation of the telescope but maintaining the same boresight. This configuration was chosen in order have a simpler structure for the support of the mirrors and horns.