A Millimeter Wave Pseudorandom Coded Meteorological Radar

This paper proposes and describes a meteorological radar for precipitation drop size spectrum analysis and cloud studies The type of radar proposed is a millimeter wave pseudorandom coded CW radar. This radar is analyzed on both precipitation and cloud physics studies. Its expected performance is discussed and pulse compression by pseudorandom phase coding is compared with and shown, for the given constraints, to be superior to the conventional pulsed meteorological radar. The paper describes codes for CW transmitters and pseudorandom codes in particular. It describes how the codes are generated, their structure, and their usefulness. It also describes code design and how codes are used to modulate a transmitter. The overall system design is discussed including carrier frequency, Doppler frequency spread, frequency stability, and data acquisition, recording, and reduction. Two possible locked modes of system operation are described as well as experimental work suitable for such a radar.