Weather Radar WRK200


Catalog excerpts

Weather Radar WRK200 - 1

Features Vaisala Weather Radar • 250 kW klystron transmitter with low-maintenance solidstate modulator • Vaisala lightweight, semi-yoke style pedestal • 1° beamwidth low side lobe antenna • Feed forward control loop to allow extremely fast and precise antenna movement • Built around RVP900” and IRIS” software • Remote control and monitoring • Image rejection > 80 dB (> 100dB with Vaisala waveguide filters) • Dynamic range >99 dB (2ps pulse) • Optional built-in automatic dual channel calibration Vaisala Weather Radar WRK200 is a dual polarization C-band radar that uses a coherent klystron transmitter. Dual-polarization • Precision horizontal and vertical beam matching • > 35 dB integrated crosspolarization isolation • Dual channel digital IF receiver Dual polarization radars send vertically and horizontally polarized microwaves to measure the parameters needed for analyzing the target shape and improving data quality. Targets are identified as, for example, rain, hail, or snow using sophisticated data processing techniques. Enhanced Reflectivity Enhanced reflectivity is a signal processing technique that improves the detection capabilities of a dual polarization radar. The technique uses echo power estimation to improve the detectivity of weak signals over a long range. Enhanced reflectivity is exclusive to Vaisala dual polarization radars and RVP900”. HydroClass™ Vaisala Hydrometeor Classification (HydroClass) software makes optimal use of dual-channel measurements to detect the types of scatterers present in the atmosphere, such as rain, hail, snow, graupel, and even non-meteorological targets such as insects, chaff, and sea clutter. The benefit is improved data quality and more accurate warnings for hazardous weather such as hail. Attenuation Correction Attenuation by intervening heavy precipitation has been a long-standing concern with weather radars, especially in tropical environments where heavy rain is common. Dual polarization radars meet this challenge by performing accurate, realtime attenuation correc

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Weather Radar WRK200 - 2

Transmitter tube Klystron VKC8387 Pulse widths Typical 0.5, 0.8, 1.0, 2.0, max 5.0 qs Pulse repetition frequency 250 ... 2125 Hz Modulator Solid state Phase stability <0.1 degrms Operating humidity 0 ... 95 % non-condensing Total weight (4.5 m antenna and 1530 kg pedestal) Operating altitude/Ambient pressure Up to 3000 m Up to 700 hPA Type Center-fed parabolic reflector Peak side lobes at main polarization < -29 dB ( typically < -30 dB) planes Integrated cross-pol isolation < -35 dB Cross-pol isolation at main polarization < -36 dB planes H/V alignment (squint angle) < 0.1° Type Semi-yoke...

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Weather Radar WRK200 - 3

Radar Receiver Type Dual stage, dual channel IF downconverter and digitizer Noise figure < 2 dB Dynamic range > 99 dB (2 microsecond pulse), (option > 115 dB) Image rejection > 80 dB > 100 dB with waveguide filters Tuning range 5.5 ... 5.7 GHz Type Vaisala RCP8 with IRIS Radar Scan modes PPI, RHI, Volume, Sector, Manual, Rapid Scan Local display Real time, Ascope, BITE, products Cooling Equipment rack: air-conditioned Transmitter: forced air Operating temperature +5 ... +40 °C +15 ... +25 °C recommended Operating humidity 0 ... 95 % RH, non-condensing Storage temperature -50 °C...+50 °C...

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