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Superglossary - Radar Category: Military and Defence > RADAR Date & country: 09/12/2013, USA Words: 200

Pulse Length
The time duration, measured in micro seconds, of a single radar pulse. Also called pulse duration.

Pulse Length Error
A range distortion of a radar return caused by the duration of the pulse. The error is always on the

Pulse Radar
A pulse radar transmits a sequence of short pulses of rf energy, and estimates range to the target b

Pulse Radar
A refinement of the original k-band radar gun. Pulse radar can be used from a moving vehicle as well

Pulse Repetition Frequency (PRF)
The number of radar pulses transmitted each second. The pulse transmission rate is automatically len

Pulse Repetition Rate (PRR)
The number of pulses transmitted per second.

Pulse Volume
The volume in which the radar data for one range bin are measured. Defined by the width of the radar

Racon
Radar beacon which, when triggered by a ship's radar signal, transmits a reply which provides the ra

Radar
Radar is used to describe systems that use electromagnetic energy to detect distant objects and poss

Radar Absorbent Material (RAM)
Radar absorbent material has electrical properties similar to free space. When radar impacts radar a

Radar Altimeter
A radar altimeter is used by an aircraft to determine its height above terrain.

Radar Antenna
A radar antenna is a physical object used to focus, direct and concentrate electromagnetic energy in

Radar Beacons
Transmitters operating in the marine radar frequency band, which produce distinctive indications on

Radar Clutter
The term clutter refers to any objects that cause unwanted reflections of a radar's electromagnetic

Radar Cross Section (RCS)
The radar cross section (rcs) of a target is the projected area that would intercept the transmitted

Radar Detector
An electronic device used to find any radar operating in the vicinity.

Radar Displays
A means of displaying target information in a clear and concise manner.

Radar Electronics
Traditional radar systems have relied on dedicated, radar electronics for their processing.

Radar Gun
Radar gun is a colloquial term for a type of police radar used to measure speed.

Radar Indicator
A unit of a radar set which provides a visual indication of radar echoes received, using a cathode-r

Radar Jammer
A radar jammer is a type of jammer designed specifically designed to jam radar receivers.

Radar Range
A measurement of the distance an object can be seen by radar based on the height of the antenna, the

Radar Range Equation (RRE)
The radar range equation (rre) relates the range performance of a radar system to other radar compon

Radar Receiver
A unit of a radar set which demodulates received radar echoes, amplifies the echoes, and delivers t

Radar Receivers
Clutter is a major practical problem in the use of radar systems. Radar receivers often incorporate

Radar Reflector
A metal device designed for reflecting strong echoes of impinging radar signals towards their source

Radar Reflector
A radar reflector is a passive device that is designed to be ab efficient reflector of radar signals

Radar Repeater
A unit which duplicates the ppi display at a location remote from the main radar indicator installat

Radar Screen
Radar screen is another term for radar display.

Radar Station
Radar station is a term used to describe a facility housing a ground radar.

Radar System
A radar system includes

Radar Transmitter
A unit of a radar set in which the radio-frequency power is generated and the pulse is modulated. Th

Radar Warning Receiver (RWR)
A radar warning receiver is a type of radar detector.

Radar Zone Of Influence
The area outside the main power beam or outside the beam width.

Radio Wave
Any electromagnetic wave at a frequency between approximately 10 kilohertz and 300,000 megahertz (a

Ramark
A radar beacon which continuously transmits a signal appearing as a radial line on the ppi, indicati

Range
The minimum range difference between separate contacts at the same bearing which will allow both to

Range Bin
Discrete element along a single radial of radar data at which the received signals are sampled. Rang

Range Control
Selects the scale used by the display and sets the distance between the range rings to correspond wi

Range Gate Pulloff
Targets being tracked using range gates can attempt to employ a tactic known as range-gate pull off

Range Height Indicator (RHI)
A range height indicator (rhi) is a radar display that represents the height of the target on the ve

Range Markers
Equally spaced concentric rings of light on the ppi which permit the radar observer to determine the

Range Resolution
Range resolution is the ability of the radar to differentiate or resolve two targets that are close

Range Rings Control
Range rings are displayed on the screen when selected by this control and provide a rough estimate o

Range Selector
A control for selecting the range setting for the radar indicator.

Reflection
The return of all or part of a sound beam when it encounters the boundary between two media. The mos

Reflection Plotter
An attachment fitted to a ppi which provides a plotting surface permitting radar plotting without pa

Reflectivity Factor (Z)
Integral over the backscatter cross-section of the particles in a pulse volume. For particles small

Refraction
The bending of the radar beam in passing obliquely through regions of the atmosphere of different de

Relative Motion Display
A type of radarscope display in which the position of own ship is normally fixed at the center of th

Resolution
The degree of ability of a radar set to indicate separately the echoes of two contacts in range, bea

Resolution In Bearing
The ability to display multiple objects individually that are closely spaced at the same range. Shor

Resolution In Range
The ability to display multiple objects individually that are closely spaced at the same bearing. Sm

Responder Beacon
Transponder beacon.

RHI (Range Height Indicator)
Display on which radar signals are shown with height as the vertical axis and range as the horizonta

Same Direction Tracking
Tracking vehicles from behind or in front of the patrol vehicle going the same direction while the p

Same Lane Radar
Uses dual antenna moving radar to clock vehicles ahead or behind a rolling cruiser. Example

Sample Volume
The volume in which the radar data for one range bin are measured. Defined by the width of the radar

Satellite Radar
Satellite radar systems can be used for a variety of surveillance applications.

Scan
To investigate an area or space by varying the direction of the radar antenna and thus the radar bea

Scanner
A unit of a radar set consisting of the antenna and drive assembly for rotating the antenna.

Screen
The face of a cathode-ray tube on which radar images are displayed.

Sea Return
Clutter on the radarscope which is the result of the radar signal being reflected from the sea, espe

Secondary Radar
A secondary radar system is a cooperative target identification system in which the interrogator tra

Selectable Direction Tracking
This mode of radar operation allows the operator to monitor targets that are only going toward the p

Selectivity
A radar detector 's ability to differentiate between non-police radar signals and the real thing.

Sensitivity Time Control (STC)
An electronic circuit designed to automatically increase the gain as the electron beam is deflected

Shadow Sector
A sector on the radarscope in which the appearance of radar echoes is improbable because of an obstr

Side Lobes
Unwanted lobes of a radiation pattern, ie., lobes other than major lobes. Also called minor lobes.

Sidelobe Blanking (SLB)
Antennas with poor sidelobe performance can be improved by using sidelobe blanking techniques.

Sidelobe Cancellation (SLC)
Sidelobe cancellation determines the direction of the jamming signal and effectively steers a null i

Sidelobe Control
Sidelobe control comes initially from good antenna design where one requirement is the minimisation

Spectral Width (W)
A measure of the dispersion of velocities within the pulse volume. Standard deviation of the velocit

Speed Of Light
186282.4 miles/sec or 299,792,458 meters/sec.

Spot Jamming
Spot jamming aims to concentrate the maximum amount of jammer power into the bandwidth of an individ

Stabilized Display (North-Upward)
A ppi display in which the orientation of the relative motion presentation is fixed to an unchanging

Stationary Radar
Is operated from a stationary position. Virtually all radars work in this mode and some will also wo

Strobe
Variable range marker.

Surveillance Radar
Surveillance radar is used to detect targets within range of the radar.

Sweep
Determined by the time base or range calibration, the radial movement of the stream of electrons imp

Sweep Jamming
Sweep jamming aims to counter a number of different radar systems spread in frequency over a wide ba

Synthetic Aperture Radar (SAR)
Synthetic aperture radar (sar) describes a way of synthesising a very large array antenna over a fin

Trace
The luminous line resulting from the movement of the points of impingement of the electron stream on

Tracking Radar
Tracking radar aims to accurately track the target in range, velocity or most commonly bearing.

Transponder
A transmitter-receiver capable of accepting the challenge (radar signal) of an interrogator and auto

Transponder Beacon
A beacon having a transponder. Also called responder beacon.

Trigger
A sharp voltage pulse usually of from 0.1 to 0.4 micro-seconds duration, which is applied to the mod

True Motion Display
A type of radarscope display in which own ship and other moving contacts move on the ppi in accordan

Variable Range Marker
A luminous range circle or ring on the ppi, the radius of which is continuously adjust able. The ran

Vertical Beam Width
The beam width of the radar pulse measured in the vertical plane. Most radar units have a vertical b

VG2
A vg2 gun is a special device used by law enforcement to identify the presence of a radar detector.

VRM
Variable range marker. An adjustable range ring used to measure the distance to a target. When the v

Wave
Transmission of energy through medium. Waves travel in repeating cycles of identical wavelength.

Wave Frequency
The number of cycle of waves that passes a point in one second. Frequency is measure in hertz (hz).

Wave Velocity
The speed at which the wave travels. All radio waves and light waves travel at a constant speed, the

Wavelength
A distance from one point in the wave cycle to the next equivalent point in the same direction as th

Weather Radar
Weather radar is used as an aid to weather forecasting.

Zoom Control
Zooms the display in on the area around the cursor or between the cursor and the display center to e

K-Band
Police traffic radar has been assigned specific frequencies by federal communication commission (fcc

X Band Radar
Radar frequency tolerance 10.525 ghz25 mhz frequency range 10.500-10.550 ghz. X-band radars have bee