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adar bombsight
moment of simulated release of free-fall bomb. Plotters on
ground determine precisely where an actual bomb would
have fallen.
radar bombsight Sight for level bombing in which,
irrespective of whether target can be viewed optically,
numerical data on target relative position and velocity are
fed by radar carried in aircraft.
radar boresight line That along axis of aerial.
radar calibration 1 Use of radar direction and distance
information to check another system.
2 More often, use of accurately positioned aerial target
to check accuracy of ground radar.
radar camouflage Use of radar-absorbent or reflective
materials to change radar-echoing properties of object’s
surface; does not include dispensed countermeasures,
jamming or other active technique.
radar clear range Bombing or firing range which
accepts responsibility for avoiding danger to aircraft
straying into it.
radar clutter See clutter.
radar command Command guidance in which target and
missile positions and velocities are continuously determined
by radar.
radar contact Identification of echo on radar display,
esp. as that sought. When thus advised, in civil ATC,
aircraft ceases normal reporting.
radar control Control of air traffic based upon
position/height information supplied by radars.
radar-controlled gun AAA gun, aircraft turret or other
gun system whose aim is controlled by radar and
computer which feeds all information necessary (sightline
spin, lead etc).
radar controller Air traffic controller whose positional
information is provided by radar displays, and holding
radar rating appropriate to assigned functions.
radar countermeasures See countermeasures, ECM.
radar coverage Limits within which objects can be
effectively detected by radar(s) at given site or installation;
may be angular, polar diagram or in other terms.
radar cross-section, RCS Apparent size of target as
judged by its displayed echo, determined (in absence of
ECM activity) by true size, range, aspect, geometric
shape, materials, surface texture and treatment and other
factors including intervening dust and precipitation.
Normally defined by ratio P r /P s where P r is radar power
received at target and P s is power reflected, plotted as
polar (1) in horizontal plane.
radar display Visual electronic display of radar
information.
radar distance Distance to target and return, thus
1 radar-ft = 2 ft.
radar echo Signal indication of object which has
reflected energy back to radar.
radar element Radar as portion of large system. e.g.
PAR as part of overall GCA.
radar fire Gunfire guided by radar, or against radartracked
target.
radar fix Obtained from PPI radar map display.
radar flight-following General observation of progress
of identified aircraft targets sufficiently to retain their
identity or observation of specific radar targets (FAA).
radar foot Radar distance.
radar fuzing Comprehensive duplicated radar altimeters
radar prediction
are installed in many NW to detonate device at selected
height above surface.
radar gunlaying Aiming using radar target
position/velocity and, usually, radar input of range; can
be manual, automatic with manual override or fully auto.
radar handover Transfer of control using radar.
radar horizon At any location, line along which direct
radar rays are tangential to Earth’s surface; in practice,
usually same as radio horizon., in the region of 185 km,
115 miles, from a height of 10,000 ft.
radar identification Use of transponder or procedure
manoeuvre to establish positive identification of object
seen on radar.
radar imagery Imagery produced by recording radar
waves reflected from target surface in air/surface reconnaissance.
radar indicator Radar display.
radar information service Controller informs pilot of
heading, distance (and, if known, FL) of conflicting
traffic, but does not offer advice.
radar integration Automatic integration of information
from air-defence, naval and other primary and secondary
radars.
radar intelligence Self-explanatory, information gleaned
from radar images of both friendly or hostile subjects.
radar intelligence item Feature which is radar-significant
but which cannot be identified exactly at moment of
its appearance.
radar map Cartographical information superimposed
on radar display.
radar mapping Cartography based upon radar, esp.
SLAR.
radar mile Unit of time equal to 10.75 μs; time for EM
radiation to reach target 1 statute mile distant and return.
Rarely, 12.369 μs [also given as 12.359] for nautical mile.
radar monitoring One of three types of radar service
afforded by civil controllers; radar flight-following of
aircraft navigated by own pilots or crews, and advice on
deviations from track, possible conflicting traffic or
progress on instrument approach from final approach fix
to runway.
radar navigation guidance One of three types of radar
service, ground vectoring of aircraft to provide course
guidance.
radar netting Linking of several radars (surveillance,
HFR or similar air-defence radars) to single centre to
provide integrated target information.
radar netting station Centre which can receive data from
radars and exchange these among other radar stations,
thus forming netting system.
radar netting unit Optional electronic equipments
converting air-defence fire-distribution system command
centre to radar netting station.
radar performance Usually means peak power divided
by minimum detectable signal power, but there are other
meanings.
radar picket Ship, aircraft or vehicle stationed at
distance from surface force for purpose of increasing
radar detection range. Hence, ** combat air patrol.
radar picket escort Surface vessel dedicated to ESM,
ECM and electronic search facilities. USN designation
DER.
radar position symbol Computer generated.
radar prediction Graphic portrayal of estimated radar
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