Fig. 3

General view of a telescope configured with two detector matrices. The left matrix is shown with its frame closed as during field operations. The frame of the right matrix is open and the detector matrix (Fig. 4) is visible together with the optical cookie, the photomultiplier, and the electronic boards. The whole system is protected by a tarpaulin not shown on the picture. The frame basis is long enough to allow a distance between the matrices of about 2.5 m, i.e., an aperture angle of 65 for 32 × 32 matrices and 35 for 16 × 16 matrices.