See radar beacon.

Resource and Admission Control Subsystem

Acronym for radiation absorbed dose. The basic unit of measure for expressing absorbed radiant energy per unit mass of material.
Note 1: A rad corresponds to an absorption of
0. 01 J/kg, i.e., 100 ergs/g.
Note 2: The absorbed radiant energy heats, ionizes, and/or destroys the material upon which it is incident.

Abbreviation for radian(s).

1. Acronym for radio detection and ranging.
1. A radio detection system that transmits short bursts (pulses) of rf energy and detects their echoes from objects (targets) such as aircraft or ships.
Note: The round-trip propagation time for the echo return may be used to determine the target's range (distance from the radar's antenna). If the transmitting antenna has a… (Read More →)

1. A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the triggering radar, providing range, bearing and identification information. [NTIA] [RR]
2. A receiver-transmitter combination which sends out a coded signal when triggered by the proper type of pulse, enabling determination of range… (Read More →)

The range that corresponds to the situation in which a radar transmitter is on and hence the receiver must be off, so that the radar transmitted signal does not saturate, i.e., does not blind, its own receiver.
Note: Radar blind ranges occur because there is a time interval between transmitted pulses that corresponds to the time required for a pulse… (Read More →)

The magnitude of the radial component of velocity of an object, i.e., a target, relative to a radar site, that cannot be measured by the radar unit.
Note: Radar blind speeds occur because of the relationship between the transmitted pulse repetition rate (PRR) and the received pulse-repetition rate. The Doppler pulse repetition rate is the difference between the transmitted and… (Read More →)

An expression of the extent to which an object, i.e., a target, reflects radar pulses, usually with respect to their point of origin.
Note: The radar cross section of an aircraft can vary by a factor of over 100, depending on the aspect angle of the aircraft to the radar transmitter. Radar reflection off the nose of the aircraft usually… (Read More →)

Intelligence derived from data collected by radar. [JP 1-02]