A 35-GHz scanning Doppler radar for fog observations

From: Journal of Atmospheric and Oceanic Technology | Date: July 1, 2003| Author: | Copyright information

ABSTRACT

To observe fog, a 35-GHz scanning Doppler radar was designed, assembled, and tested. The radar, mounted on a flatbed vehicle for portability, transmits peak powers of 100 kW in a pulse of 0.5-[mu]s width and a beamwidth of 0.3[degrees]. Thus, a reflectivity factor Z of -20 dBZ at a range of 10 km generates a signal-to-noise ratio of O dB. Doppler velocity measurements are made by sampling the radio frequency phase within each pulse transmitted by a magnetron oscillator and referencing the phases of the received echoes to the transmitted phase. A Nyquist velocity of approximately 9.7 ...

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