title: Type 517 radar
text: # Type 517 radar
  
  Type 517 radar is believed to be an A-band/VHF air search radar widely deployed on PLAN surface vessels with 4 antennas in two crossed-brace supported pairs, one above the other, mounted in pairs on each side of a single tubular support carried on the turning gear.
  
  Similar to the Russian P-8 'Dolphin'/KNIFE REST radar which China manufactures and deploys for the HQ-2 surface to air system complex, it is believed that Type 517 has similar capabilities and specifications. The system is manufactured by the Beijing Leiyin Electronic Technology Development Company (北京雷音电子技术开发有限公司).
  
  ## Specifications
  
  Technical Specification
  
  * System Band: meter-band
  * Beam width: 5° (H), 30° (V)
  * Scan coverage: 360°×30°
  * Range: 350 km against 4 $m^2$ RCS target; 100 km against 0.1 $m^2$ RCS Stealth aircraft
  * Accuracy: range error ≤200m, angle error ≤1°
  * Processing capacity
     * Multiple tracking: ≥ 20 pcs
  * Antenna
     * Antenna : Yagi-Uda array
     * Rotation speed: 6 RPM
  * Transmitter / Receiver
     * Frequency: 180–210 MHz (meter-band)
     * NF: <6 dB
  * Power Supply
     * AC: 220VAC (150~250 VAC)
     * Power consumption: 25 kW
  * Features
     * Non-coherent pulse compression (NCPC) system
     * Moving target automatically detection
     * Long range air surveillance
  * Other reported names:
     * Spider (export)
     * SUR17B
  