Airborne radar that measures the distance of the aircraft above the ground [18].
RADAR BEAM
The space in front of a radar antenna where a target can be effectively detected or tracked. Defined by areas that contain half or more of the maximum power transmitted [18].
RADAR DETECTOR
A detector that, in its simplest form, only needs to be capable of producing an output when RF energy (reflected from a target) is present at its input [12].
RADAR DISTRIBUTION SWITCHBOARD
An electrical switching panel used to connect inputs from any of several radars to repeaters (indicators) [18].
RADAR MILE
Time interval (12.36 microseconds) for RF energy to travel out from a radar to a target and back to the radar; radar nautical mile [18].
RADAR TEST SET
A combination of several test circuits and equipment used to test various characteristics of a radar [18].
RADIATION FIELD
The electromagnetic field that radiates from an antenna and travels through space [10].
RADIATION LOSSES
The losses that occur when magnetic lines of force about a conductor are projected into space as radiation and are not returned to the conductor as the cycle alternates [10].
RADIATION PATTERN
A plot of the radiated energy from an antenna [10].