Vaisala WRK100 Technical data

Vaisala Weather Radar WRK100

High-Performance and Reliability

The WRK100 is Vaisala’s single polarization C-band klystron Doppler Weather Radar. The modular system design consists of a highperformance antenna and pedestal and a double cabinet that contains the transmitter, receiver, power supplies, dehydrator and processor. The various components have been engineered and tested for long-life and low-maintenance in even the harshest environments. The benet is high-data quality and availability for critical weather service operation.

Like all Vaisala Weather Radars, the WRK100 incorporates the advanced Vaisala Sigmet family of signal and data processing products. Vaisala Sigmet processors are the world standard, used in radar networks such as the US NEXR AD, Environment Canada, Spanish INM and at various

international airports for TDWR wind shear detection applications. Vaisala Sigmet software provides comprehensive radar product generation, display and forecasting features. Integration to other Vaisala systems such as lightning detection networks, rain gauge, LLWAS and surface weather is available.

Engineered for Remote Operation

For most customers, unattended remote operation is essential. The WRK100’s comprehensive remote control, BITE and active monitoring features allow radar maintenance to be coordinated from a central facility. The detailed level of fault reporting allows maintenance personnel to accurately assess any problem before traveling to the radar site. The benet is reduced MTTR and higher data availability.

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Features/Beneﬁts

250 kW Klystron transmitter

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with low-maintenance solidstate modulator

Vaisala’s light-weight, semi-

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yoke-style pedestal

1 degree beamwidth low side

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lobe antenna

Modular double-cabinet design

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Built around Vaisala Sigmet

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RVP900 signal processor

Wide dynamic range digital IF

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receiver

Fully programmable scanning

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Comprehensive BITE

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Integral flat screen display for

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local maintenance

Remote control/monitoring

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Improved interference filtering

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Feed forward control loop

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to allow extremely fast and precise antenna movement

Options:

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- Built-in automatic calibration

Dual polarization upgrade ready

Investment Protection for the Future

The service life of a modern weather radar system can be over 15 years, during which time there will be major technology advances. Vaisala’s modular approach and use of accepted open interface standards is designed to make the WRK100 upgradeable in the future. For example, the system can be purchased as dual-pol ready, or upgraded in the eld to dual polarization.

Technical data

Transmitter

Type Klystron VKC8387 Operating frequency range 5.6 - 5.65 GHz Peak power 250 kW Average power max 550 W Duty cycle 0.0022 Pulse widths Typical 0.5, 0.8, 1.0, 2.0, max 5 µs PRF 250 to 2125 Hz Modulator Solid State Phase stability ≤0.1 deg rms

Antenna

Type Center-fed parabolic reﬂector Diameter 4.5 m Gain (typical) 45 dB Beam width <1 degree Peak side lobe (typical) -28 dB Peak on horizontal axis (typical) -33 dB Polarization Linear horizontal Weight 620 kg

Pedestal

Type Semi yoke elevation over azimuth Elevation range -2 to 108 degrees Maximum scan rate 40 deg/sec Acceleration 20 deg/sec Position accuracy 0.1 deg Weight 900 kg (total with antenna 1520 kg) Motors Brushless AC servo

Digital IF Receiver and Signal Processor RVP900

Type Vaisala Sigmet RVP900 IF digitizing 16 bits, 100 MHz in 5 channels Range resolution N*15 m Number of range bins Up to 4050 Velocity dealiasing Dual PRF 2x, 3x, 4x Range dealiasing by phase coding Clutter ﬁlters ﬁxed, adaptive or GMAP to >60 dB clutter

System Speciﬁcations

PHYSICAL DIMENSIONS

Cabinet (w x h x d) 1400 x 1800 x 1300 mm Cooling Air-conditioned and forced air Weight 977 kg Total height 1890 mm

CABINET ENVIRONMENT

Operating +5 °C to +40 °C, 0 to 95 %RH, non-condensing Recommended +15 °C to +25 °C Storage -50 °C to +50 °C without oil

-10 °C to +50 °C with oil

ANTENNA/PEDESTAL ENVIRONMENT

Operating -40 °C to +55 °C, 0 to 95 %RH, non-condensing Storage -50 °C to +50 °C

INPUT POWER

Voltage 230/400 VAC +10 %, 50-60 Hz +5 %

POWER CONSUMPTION

Cabinet max. 8720 W with UPS

max. 7850 W without UPS

Antenna/pedestal 1050 W (max.), 200 W (typical)

cancellation

RF-to-IF Receiver

Type Dual stage IF downconverter Dynamic range (1.0 microsec) >96 dB (option >110 dB) IF frequency 442/60 MHz Image rejection >50 dB Phase stability 0.1 deg rms Tuning range 5.5 - 5.7 GHz Noise ﬁgure < 2 dB

Radar Controller

Type Vaisala SIGMET RCP8 with IRIS/Radar Scan modes PPI, RHI, Volume, Sector, Manual Local display Real time, ascope, BITE, products

For more information, visit www.vaisala.com or contact us at sales@vaisala.com

Options

Dual pol ready Factory prepared antenna and pedestal

for dual pol Radome 6.7 m, foam core sandwich, random panel Automatic calibration Forward and reverse transmitted power monitoring

This material is subject to copyright protection, with all copyrights retained by Vaisala and its individual partners. All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. The reproduction, transfer, distribution or storage of information contained in this brochure in any form without the prior written consent of Vaisala is strictly prohibited. All speciﬁcations — technical included — are subject to change without notice.