Products - ARC-C250P

ARC C250P, C-band Polarimetric Doppler Weather Radar  

The ARC C250P radar is designed for high quality data acquisition and analysis in both research and operational settings.  ARC utilizes the NCAR-developed TITAN/CIDD radar product generation and display software, which has been refined through decades of research and operational use around the planet, for both standard and polarimetric radar products. 

 The ARC C250P has been implemented for studying precipitation variability and Quantitative Precipitation Estimation (QPE) for water resource management. It is an ideal operational system for monitoring severe and hazardous weather in real-time, as well as for post-event research and analysis of severe and hazardous weather and cloud and precipitation formation.

 Antenna Specifications

·         Dish Diameter: 4.3 meters (Beamwidth: 0.95 degrees)

·         Polarization:

o   Simultaneous Horizontal and Vertical (SHV), Horizontal (Hor) or Vertical (Ver) modes

o   Alternating Horizontal and Vertical (AHV) mode is available on special order

·         Scan types:

o   Surveillance (360 degrees) with elevation step

o   PPI sector scan with elevation step

o   RHI scan with azimuth step

 Transmitter Specifications  

·         Magnetron transmitter

·         Peak Power: 250 kW

·         Frequency: 5.5 – 5.7 GHz

·         PRF: 0 to 2.5 kHz

Polarimetric Radar Variables

·         Z (Equivalent radar reflectivity factor, dBZ)

·         V (Doppler radial velocity, m/s)

·         W (Velocity spectrum width, m/s)

·         P (Power received, dBm)

·         Zdr (Differential reflectivity)

·         Phi-dp (Differential phase)

·         Kdp (Specific differential phase)

·         Rho-hv (Co-polar correlation)

·         NCP/SQI (Normalized Coherent Power/Signal Quality Index)

·         Zcoh (Coherent equivalent radar reflectivity factor, dBZ)

·         Phase (Differential and Absolute phase)

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