{{Unreferenced, date=January 2008
The JLP-40 is a tactical
air defense
Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...
radar
Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...
designed to use with height finding radars such as the
JLG-43 Radar The JLG-43 radar is a nodding height finding radar, a two-dimensional (2D) radar which only provides azimuth and height data and is normally paired with other air search radars which provides the range to complete the picture. It is very similar to ...
. It is similar in design to the Russian " Bar Lock" series radar and may have been derived from it as part of the sale of the SA-2 system from the Former
Soviet Union
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...
in the early 1960s. It features the same arrangement of the two large scanners attached to front and ear sides of a rotating cabin that houses the transmitter/receivers.
Operating modes
The system operates in
S-band
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz). Thus it crosses the conventional ...
and
L-band
The L band is the Institute of Electrical and Electronics Engineers (IEEE) designation for the range of frequencies in the radio spectrum from 1 to 2 gigahertz (GHz). This is at the top end of the ultra high frequency (UHF) band, at the lower en ...
, each parabolic scanner being illuminated by stacked horn feeds to generate families of multiple beams. There are five S-band transmitter/receivers and these are thought to operate with the lower of the two antennas, while the L-band feeds illuminate the upper scanner array. An
IFF
In logic and related fields such as mathematics and philosophy, "if and only if" (shortened as "iff") is a biconditional logical connective between statements, where either both statements are true or both are false.
The connective is bicon ...
interrogator is incorporated in the system. Three PPI displays are available, one azimuth/range display and two to four additional PPI. MTI is provided in the L - band modules.
The whole system is air transportable but requires considerable time and effort to assemble/disassemble. It is being produced by the Chengdu Jin Jiang Electronic System Engineering Company.
Specifications
* S / L - bands
* Range: 270 km
* Height: 20,000 metres
* Azimuth coverage: 360°
* Elevation coverage: 0.5°-30°
* Accuracy: 500 metre (range) +/- 0.5° (bearing)