Digital techniques used in the steering apparatus of the GPO steerable aerial at Goonhilly Downs

A discription of the logic design for the digital control equipment is followed by further descriptions of items of particular interest. The means of applying off-sets to the demanded aerial position for over-coming possible inaccuracy of the predicted orbit; and to demand accuratly determined velocities manually; means of conversion from pure binary form to provide displays in terms of angles, and the derivation of analogue voltages for the for the servo-amplifiers are discussed in detail.

A critical analysis of the equipment in the light of operational experience concludes the paper.