SKY497
Installation Manual
1-2
Rev. C
Figure 1-1. Surveillance Zone
1.3 PHYSICAL DESCRIPTION
The SKY497 System consists of the following main components:
•
Transmitter Receiver Computer
•
Display
•
Directional Antenna, NY164, or equivalent (e.g., NY156)
SKY497 is an active system that operates as an aircraft-to-aircraft interrogation device. The SKY497
equipment interrogates transponders in the surrounding airspace similar to ground based radars. When
replies to these active interrogations are received, the responding aircraft’s range, altitude, and closure
rates are computed to plot traffic location and predict collision threats. Figure 1-1 shows the SKY497
surveillance zone for intruding aircraft. A simplified block diagram of the main components and their
relationships is shown in figure 1-2.
