Products - ARC-X250P

ARC X250P, X-band Polarimetric Doppler Weather Radar

The ARC X250P 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 X250P has been implemented for studying wind shear around airports and Quantitative Precipitation Estimation (QPE).   It is an ideal operational system for local monitoring of weather impacts on aviation and severe and hazardous weather in real-time.  Research regarding advanced detection of wind shear events and water resource management  have been conducted with the ARC X250P.

 Antenna Specifications

·         Dish Diameter: 2.44 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: 9.3 – 9.5 GHz

·         PRF: 0 to 4.0 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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