D3R

Dual-wavelength, Dual-polarized Doppler Precipitation Radar

D3R

Photos courtesy of NASA Goddard Space Flight Center.

Leveraging a novel transceiver and waveform design developed during a RSS NASA Phase II project, Remote Sensing Solutions, Colorado State University and NASA Goddard Space Flight Center teamed to develop the Dual-wavelength, Dual-polarized Doppler Precipitation Radar (D3R). This innovative solid-state radar systems is serving as a calibration/validation radar system for the Global Precipitation Measurement (GPM) mission. It acquires dual-polarized Doppler and reflectivity precipitation volume backscatter measurements simultaneously at Ku and Ka-band wavelengths. Utilizing frequency diversity pulse compression approach, it achieves sensitivity close to traditional tube-based precipitation radars while suffering no blind region. Internal calibrations enable the system to maintain better than 0.1 dB stability.

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