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Doppler on Wheels (DOW)
University of Oklahoma
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| Contact Person:
| Joshua Wurman
Center for Severe Weather Research
1945 Vasser Circle
Boulder, CO 80305
720-304-9100
jwurman@cswr.org
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| URL
| http://aaron.ou.edu/dow/
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| Instrument available
to community?
| yes
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| Instrument:
| 3-cm mobile dual-Doppler network
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| Platform:
| 2 trucks
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| Measurement:
| Doppler velocity, Reflectivity, spectral
width, dual-Doppler syntheses are produced.
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| Data recording:
| hard disk, CD, Exabyte
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| Operational Limitations:
| Attenuation of 3-cm radiation in heavy
precipitation
difficulty scanning in winds over 60 m/s
platform may not be stable above 75 m/s
performance unknown below -15C
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| Applications:
| Tornadoes, Hurricanes, Flows in Terrain,
BL studies, general-use radar, education
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| Cost per day:
| $500/day/radar base cost
1-2 operators needed depending on application
gas (4mpg) depending on application
minor costs for diesel, CDs cell phone communications (depending on application)
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| Recent Experiments:
| Juneau, MAP, CALJET, ROTATE, VORTEX,
HAL, LIFT
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| Instrument Specifications:
| both systems are similar
250 kW peak power, 250 W average
Pulselength: 0.1-2 microseconds (15-300 m resolution)
Gatelength: 0.08-4 microseconds (12-600 m resolution)
Gates: depends on PRF, typically 100-600
PRF: up to 5000 Hz, including stagger/dual-PRT
Nyquist: +/- 40 at 5000 Hz. +/- at least 130 m/s with stagger/dual PRT
Integration: 16-1000 pulses/beam
Scan rate: 30-60 deg/sec
Peak truck velocity: 74 mph
Range: ~400 miles on one tank
Operation time: about 150 hours on one diesel tank
Beamwidth: -.95 degrees
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