ATC Unit 9b.

A radar system in which the object to be detected is fitted with a radio receiver/transmitter called a transponder and works on the transmit/reply principle.

Secondary Radar/Radar Beacon

An airborne radar beacon receiver/transmitter which automatically receives signals from interrogators on the ground and selectively replies with a specific pulse or pulse group.

Transponder

Ground-based surveillance radar beacon transmitter-receiver which transmit discrete radio signals that request a reply from all air-borne transponders.

Interrogators

Derived from a transponder return presented on a radar scope; also called a Beacon Target.

Secondary Radar Target

Computer generated and shown on an analog radar display resulting from a primary radar return or a radar beacon reply.

Digitized Target

What does STARS stand for?

Standard Terminal Automation Replacement System

Used for identifying aircraft assigned a discrete beacon code, maintaining indent of targets and performing handoffs of these targets between ATC controllers.

STARS

What may terminal automation be used for?

• Track

• Tag

• Handoff

• Obtain Altitude Information

• Complete Coordination

• Obtain Groundspeed

• Aircraft Identification of Secondary Targets

What secondary radar system is used by all CONUS USAF locations?

STARS