Phase angle analogs in out-of-sight control instrumentation

This paper describes the methods and techniques employed in real time display of telemeter data for missile control purposes. Emphasis is placed on the use of the electrical phase angle between two alternating voltages as the analogue of vehicle flight parameters such as Altitude, Airspeed, Heading, etc. Attention is given to the advantages and disadvantages of the various transmission methods and the factors governing the choice of analogue for a particular function.