There is a choice of 3 arrays . A pair of transmitters is fed to orthogonal antennas on a row of antennas. A pair of transmitters in this array feeds two rows of antennas. Each row has 12 crossed dipoles giving a total of 144 antennas. The transmitters feed the antennas through about 50 km of aluminium co-axial transmission lines .
Control system Tuning to a new frequency is done by a PC and can take a few minutes.
30 deg is possible. Complicated amplitude modulation formats are possible under computer or other sources of control. The radiated wave can be linearly or circularly polarized with either sense of rotation. Polarization reversal can be achieved on a pulse to pulse basis. Accurate timing to within microseconds is possible.