JY-9 Radar
Encyclopedia
The JY-9 Radar is a mobile S-band low altitude search radar
intended for use in air defense, gap filling, airport surveillance and coastal defense. It is designed for effective detection of targets at low altitude in both ECM
and natural clutter
environments.
pallet and a power station shelter and is transportable by air, rail, and sea. It has a setup and dismantle time of 90 minutes by a team of 8 men.
The JY-9 employs a dual-beam antenna assembly consisting of a deformed parabolic reflector
, two horns and two feed channels. One channel is used for transmit, but both are used for receive. The antenna rotates at 6 or 12 rpm to provide all round coverage and can be mounted on a shelter or on the ground.
The JY-9 has high anti-jamming
and anti-clutter capability due to the use of advanced techniques, including pulse
to pulse frequency agility, dual channel, JATS, wide operating band, low sidelobes, MTD
automatic spectrum processing, automatic clutter map and automatic residue map. The mean time between failures is better than 900 hours with Built-in test equipment (BITE).
The JY-9F three-dimensional low-altitude surveillance radar, is a new derivation of the JY-9 low-altitude radar. It is a fully coherent pulse-compression radar with a high reliability and mobility and can provide low-flying target information for national air defence information networks or for AAA or air traffic control systems. http://www.janes.com/articles/Janes-C4I-Systems/JY-9F-low-altitude-surveillance-radar-China.html
The JY-9F consists of an antenna assembly, an operations shelter, a trailer-installed shelter housing two diesel generators and an optional trailer-installed shelter. The antenna can be folded down or erected by a motor-driven mechanism and the assembling and disassembling of the system can be accomplished by a crew of eight men within one hour. This advanced radar incorporates the state-of-the-art techniques. The excellent low sidelobe antenna employed in the system has greatly enhanced the radar's anti-clutter capability and ECCM performance, giving improved low-altitude detection performance. Three AMTI processing channels are used, each equipped to handle a particular environmental condition, thereby providing maximum low-altitude target detection. The wideband and highly stable TWT+CFA transmitter guarantees a super-clutter visibility in excess of 40 dB in the presence of ground clutter. The quadriphase Taylor code ensures a desirable consistency, high reliability and high stability. Meanwhile, the waveform agility can be realised. The JY-9F radar is characterised by high reliability and maintainability with an MTBF of more than 400 hours and MTTR of less than 30 minutes. Due to extensive BITE adopted in the system, troubleshooting probability reaches 95 per cent while 85 per cent of faults can be isolated to PCB level and all faults can be isolated to the replaceable unit level.
The system is manufactured by the East China Research Institute of Electronic Engineering(ECRIEE)/No.38 Research Institute.
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...
intended for use in air defense, gap filling, airport surveillance and coastal defense. It is designed for effective detection of targets at low altitude in both ECM
Electronic countermeasures
An electronic countermeasure is an electrical or electronic device designed to trick or deceive radar, sonar or other detection systems, like infrared or lasers. It may be used both offensively and defensively to deny targeting information to an enemy...
and natural clutter
Clutter
Clutter may refer to any of the following:*Excessive physical disorder** Clutter , a confusing or disorderly state or collection, and possible symptom of compulsive hoarding** A type of light pollution...
environments.
System construction
It consist of a radar/operations shelter, an antennaAntenna (radio)
An antenna is an electrical device which converts electric currents into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver...
pallet and a power station shelter and is transportable by air, rail, and sea. It has a setup and dismantle time of 90 minutes by a team of 8 men.
The JY-9 employs a dual-beam antenna assembly consisting of a deformed parabolic reflector
Parabolic reflector
A parabolic reflector is a reflective device used to collect or project energy such as light, sound, or radio waves. Its shape is that of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis...
, two horns and two feed channels. One channel is used for transmit, but both are used for receive. The antenna rotates at 6 or 12 rpm to provide all round coverage and can be mounted on a shelter or on the ground.
The JY-9 has high anti-jamming
Radar jamming and deception
Radar jamming and deception is the intentional emission of radio frequency signals to interfere with the operation of a radar by saturating its receiver with noise or false information...
and anti-clutter capability due to the use of advanced techniques, including pulse
Pulse (signal processing)
In signal processing, the term pulse has the following meanings:#A rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value, followed by a rapid return to the baseline value....
to pulse frequency agility, dual channel, JATS, wide operating band, low sidelobes, MTD
MTD
MTD may refer to:*Argentine unemployed workers movement — see Piquetero*A mass transit district, such as the Champaign-Urbana Mass Transit District or the Metropolitan Transit District...
automatic spectrum processing, automatic clutter map and automatic residue map. The mean time between failures is better than 900 hours with Built-in test equipment (BITE).
The JY-9F three-dimensional low-altitude surveillance radar, is a new derivation of the JY-9 low-altitude radar. It is a fully coherent pulse-compression radar with a high reliability and mobility and can provide low-flying target information for national air defence information networks or for AAA or air traffic control systems. http://www.janes.com/articles/Janes-C4I-Systems/JY-9F-low-altitude-surveillance-radar-China.html
The JY-9F consists of an antenna assembly, an operations shelter, a trailer-installed shelter housing two diesel generators and an optional trailer-installed shelter. The antenna can be folded down or erected by a motor-driven mechanism and the assembling and disassembling of the system can be accomplished by a crew of eight men within one hour. This advanced radar incorporates the state-of-the-art techniques. The excellent low sidelobe antenna employed in the system has greatly enhanced the radar's anti-clutter capability and ECCM performance, giving improved low-altitude detection performance. Three AMTI processing channels are used, each equipped to handle a particular environmental condition, thereby providing maximum low-altitude target detection. The wideband and highly stable TWT+CFA transmitter guarantees a super-clutter visibility in excess of 40 dB in the presence of ground clutter. The quadriphase Taylor code ensures a desirable consistency, high reliability and high stability. Meanwhile, the waveform agility can be realised. The JY-9F radar is characterised by high reliability and maintainability with an MTBF of more than 400 hours and MTTR of less than 30 minutes. Due to extensive BITE adopted in the system, troubleshooting probability reaches 95 per cent while 85 per cent of faults can be isolated to PCB level and all faults can be isolated to the replaceable unit level.
The system is manufactured by the East China Research Institute of Electronic Engineering(ECRIEE)/No.38 Research Institute.
Specifications
- S - band
- Antenna: Dual beam with super cosecant² pattern
- RPM: 6, 12 rpm
- BeamwidthBeamwidthIn telecommunication, the term beamwidth has the following meanings:1. In the radio regime, of an antenna pattern, the angle between the half-power points of the main lobe, when referenced to the peak effective radiated power of the main lobe....
: 15°, 18° (vertical) - PowerPower (physics)In physics, power is the rate at which energy is transferred, used, or transformed. For example, the rate at which a light bulb transforms electrical energy into heat and light is measured in watts—the more wattage, the more power, or equivalently the more electrical energy is used per unit...
output: 200 kW (peak) - Pulsewidth: 20 μs
- PRFPulse repetition frequencyPulse repetition frequency or Pulse repetition rate is the number of pulses per time unit . It is a measure or specification mostly used within various technical disciplines Pulse repetition frequency (PRF) or Pulse repetition rate (PRR) is the number of pulses per time unit (e.g. Seconds). It...
: 790 Hz - Coverage: 360° (azimuth), 0 - 40° (elevationElevationThe elevation of a geographic location is its height above a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface ....
) - AltitudeAltitudeAltitude or height is defined based on the context in which it is used . As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The reference datum also often varies according to the context...
: 10 km - Range: 150 km (Pd=80%; Swerling I; 2 m²)
- Detection accuracy: 80 m range; 0.3° azimuth
- ResolutionOptical resolutionOptical resolution describes the ability of an imaging system to resolve detail in the object that is being imaged.An imaging system may have many individual components including a lens and recording and display components...
: 120 - 140 m; azimuth 1.3° - Track capacity: 200 plots, 72 tracks