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Meteorological Radars

S Band Dual Polarization Weather Radar

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The S band dual polarization full coherent weather radar is a new generation weather radar of China, which is a version with addition of dual polarization function based on the Doppler weather radar. It has two operation modes, one is the dual linear polarization transmit/receive mode, the other is the horizontal linear transmit and dual linear polarization receive mode.

The S band dual polarization weather radar can detect in real time not only the conventional Doppler weather parameters, such as echo intensity (dBz), radial velocity (v) and spectrum width (w), but also the dual polarization Doppler weather parameters, such as echo horizontal vertical differential reflectivity factor (ZDR), special differential phase (Kdp), zero delay correlation variable phv (0) and linear depolarization ratio (LDR). The radar can detect the shape, size, pointing angle and dielectric constant of relevant particles to realize the identification of echo characters, improve the accuracy of quantitative measurement on precipitation so as to do more accurate weather forecast. The radar is applicable for weather, weather artificial intervention, water conservancy, aviation, military and scientific research sectors.

Main Technical Features

H/V dual polarization transmit and horizontal single polarization transmit selectable;

Dual channel simultaneous receive and processing of echo H/V polarization signal;

Long range wireless remote control and data transmission;

Advanced BITE function and on-line failure identification/help system;

Dual channel large dynamic linear digital IF receiver and Doppler signal processor;

Real time echo range unfolding and velocity unfolding;

Real time dual channel on-line auto Doppler signal detection and calibration;

Antenna azimuth positioning by sun method and automatic detection of pitch position;

Network terminal and various dual polarization weather products;

Multi-scan modes (PPI /RHI /volume scan), continuous operation.

Main Performance Specifications

Operation frequency  2700-2900MHz

Intensity monitoring range  ≥500KM

Intensity measuring range  250KM

Velocity monitoring range  300KM

Dual polarization monitoring range  250KM

Azimuth scanning   0°~360°

Elevation scanning   -2°~+90°

Positioning accuracy   0.1°for azimuth

                    0.1 °for elevation

Parameter measuring range

Intensity     -10 ~ +70dBz

Velocity     +-52m/s

Spectrum width  12m/s

Parameter measuring accuracy

Intensity        1dBz

Velocity         1m/s

Spectrum width   1m/s

Differential reflectivity factor (ZDR)  0.2dB

Special differential phase (Kdp)  0.2°/km

Correlation variable (phv)     0.01

Linear depolarization ratio (LDR)  1dB

S Band 4

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