This memorial, which incorporates a FPS-6 height-finding antenna, was donated by Canadian Forces Station Sioux Lookout. It was moved from the station in May 1987 just before it closed in June 1987.
The AN/FPS-6 Radar was a long-range height finding radar used by the United States Air Force's Air Defense Command. It was introduced in the late 1950s and served as the principal height-finder radar for the United States for several decades thereafter. It was also used by the Royal Air Force alongside their AMES Type 80s. Built by General Electric, the S-band radar operated on a frequency of 2700 to 2900 MHz. Between 1953 and 1960, about 450 units of the AN/FPS-6 and the mobile AN/MPS-14 version were produced.
The radar consisted of an antenna group, a transmitter group, a receiver group, and an ancillary group. Most fixed sites had a remote group, which allowed the control of the radar from inside the operations center. Also located in operations, was the anti-jam receivers. These receivers were fed with raw video from the tower receiver, and output several types of processed video to enable operators to see through jamming.
