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| schematic drawing of YLC-6M radar’s location |
YLC-6M Radar System II
Main Features of YLC-6M Radar System
YLC-6M radar has the following five outstanding features:
(1) High mobility
YLC-6M radar adopts many advanced techniques such as accurate automatic hydraulic leveling, hydraulic folding and deploying of the antenna edge blocks, automatic north alignment and location, and etc.
The whole radar system is installed on a 6-meter-long carrier vehicle platform. Its setting-up and disassembling are conducted automatically.The operation is simple and rapid.
For the whole radar system, the setting-up time is 8 minutes/4 men and the disassembling time is 6 minutes/4 men.
(2) Fully solid state transmitter
In YLC-6M radar system, a fully solid state centralized transmitter is used so as to achieve low peak power, high reliability, good maintainability, long life cycle and high full-life-cycle efficiency-cost ratio.
The radar system can be powered up or shut down rapidly. It also can continue to operate for a long time to assume operational tasks.
(3) Good ECCM capability
l Digital Moving Target Detection (MTD) processing technique is adopted to make the radar system have good anti-ground clutter and anti-chaff capability.
l A full-coherent, fully solid state system is used to make the radar system have a very high frequency stability, a rapid adaptive pulse burst to pulse burst frequency agility, pulse to pulse frequency agility and pseudo-random pulse burst to pulse burst frequency agility, thus the anti-clutter capability of the radar system is assured. Pseudo-random frequency agility can be achieved compatible with MTI.
l Digital pulse compression technique is used. A frequency modulation (FM) signal with a large product of time width and bandwidth is used to increase resolution and decrease meteorological interference. It is also helpful to anti-active jamming.
l Low side-lobe antenna, wide band and circular polarization techniques are used, which are helpful to both anti-active jamming and anti-passive jamming.
(4) High reliability
In the radar system, a fully solid state transmitter and a two-channel, redundant thermal switching receiver are used to largely increase their reliability.
The use of miniaturization and integration techniques greatly reduces the quantities of components and plug-in boards, so a further increase of system reliability is achieved.
(5) High automatization
The radar system has BIT, extraction and tracking functions, provides an information network data communication interface, and can report data to the higher level command and control posts via wire/radio communication equipment.
Composition of YLC-6M Radar System
YLC-6M radar equipment vehicle is mainly composed of sidelobe reflector antenna, transmitter, servo, hydraulic leveling, electronic cabin and platform. Inside of the electronic cabin, there are 3 electronic equipment cabinets (i.e., receiving and signal processor cabinet, display and data processor cabinet, and servo control cabinet), in which receiver, signal processor, radar terminal, timing and master control, target extraction, anti-jamming, servo hydraulic leveling control and other electronic equipment are installed. In addition, there are documentation cabinets and spare parts cabinets in it.
In order to decrease the setting-up time, disassembling time and number of operators, radar antenna, transmitter and other electronic equipments are all installed on one carrier vehicle platform.
Diesel generator power station is installed on a trailer, which can be towed by the radar vehicle. So there is only one transportation unit for the whole radar system.
YLC-6M radar equipment consists of carrier vehicle, operation cabin, antenna and pedestal, hydraulic platform and transmitter. The hydraulic platform is a platform to support the whole radar system. It provides a space for operators to operate the whole radar system. The carrier vehicle is a carrier with which the radar is transported. The transmitter is installed on the rear of the hydraulic platform, where there are also air cooling cabin and power cabin. Inside of the former, there are two high power centrifugal blowers. Inside of the latter, there are power amplification modules of each level for the transmitter, power supply modules, BITE and other electronic equipment. Antenna and its pedestal are in the middle of the whole hydraulic platform. In the small cabin below the pedestal, there are hydraulic subsystem’s driving circuit and control circuit, feedline, receiver’s RF equipment, and etc. Inside of the pedestal, there are feedline’s rotary joints, sliding ring and etc. The antenna includes its reflector, feed horn and etc. The antenna’s reflector is composed of three blocks. In transportation state, the two edge blocks can be lowered respectively to the two sides of the transmitter. In the operation cabin, there are servo control cabinet, display and data processor cabinet, receiver and signal processor cabinet, documentation cabinets and spare parts cabinets.
In the operation cabin, there are three cabinets. They are respectively servo control cabinet, terminal cabinet, as well as receiver and signal processor cabinet. The names and locations of units in each cabinet are shown in :
Servo control cabinet | Display and data processor cabinet | Receiver and signal processor cabinet |
Power distribution unit | A/R display unit | Signal processor unit |
Leveling control, north alignment unit | Raster display unit | Control unit |
Receiver unit | ||
Servo control unit | Master console | Local oscillator |
Operator panel | ||
Power supply unit | Terminal processing unit | Power supply unit I |
Stand-by power supply unit | Power supply unit II | |
Blower | Communication switching unit | Switching unit |
Switching unit |
Setting-up Operation of YLC-6M Radar System
Requirements for Radar Site:
YLC-6M radar is highly mobile radar. All the radar equipments (excluding diesel generator power station) are installed on a 6m-long carrier vehicle platform. Therefore, it has lower requirements for its site and environment around the site. The specific requirements are as follows:
(1)Environments around the site
In the main observation direction, the blanking angle should be less than 0.2° and the ground surface should be flat. In order to decrease the interference as much as possible, the radar site should be away from broadcasting & TV station, large factory, transforming plant, high voltage line and etc. Around it, there shouldn’t be facilities that absorb electromagnetic wave such as high-speed railway, high bridge, mass of resident buildings, and etc.
(2) Radar setting-up site
In order to get better low altitude detection performance, a terrain with higher elevation should be selected as the radar setting-up site. The ground for the setting-up and adjustment of radar antenna should be a flat and solid area measuring 5´10(m2). On a temporary site, there is no need for staking; On a permanent site, one stake for grounding is needed.
(3) Lightning arrester
If the radar site is permanently used, a lightning rod should be installed. It shouldn’t be located in no main observation area. It should be 7~8m away from the antenna center. The grounding resistance shouldn’t be more than 3W. If the radar site is temporarily used, whether a mobile lightning rod is used will be decided by the weather condition in which the radar operates.
(4) Schematic drawing of radar site location
This represented the infrastructure of the being to the RADAR operation.
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