linear depolarization ratio (LDR)

linear depolarization ratio (LDR)

The ratio of the power received in the orthogonal, or cross-polarized, channel to that received in the transmission, or copolarized, channel of a dual- channel radar, when a linearly polarized signal is transmitted. Because the main component of the linearly polarized, backscattered signal from hydrometeors has the same polarization as the transmitted polarization, the linear depolarization ratio yields a value less than unity or, equivalently, a negative decibel quantity. Note that relative to the receiver channels of the radar the linear depolarization ratio is defined inversely to the circular depolarization ratio.

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Category: Meteorology
Company: AMS
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