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Categories: electronics & instrumentation, environment

BSA 12-32: Improving Radar Antenna Performance with Eigenvalue Processing of Cross-Polarization Signals

BNL Reference Number: BSA 12-32

Patent Status: Provisional filed on June 22, 2012

Summary

This invention comprises an atmospheric radar apparatus and a method for measuring a meteorological or other type of variable of a target having reflection symmetry without bias caused by coherent antenna cross-polar coupling in the atmospheric radar signals.

Description

This invention comprises an atmospheric radar apparatus and a method for measuring a meteorological or other type of variable. The apparatus includes one data processor, and one memory storing a computer program. The memory and the computer program are configured, with the data processor, to cause the apparatus to receive backscattered radar signal measurements of a target having reflection symmetry from a receiver of the atmospheric radar. The method for measuring a meteorological or other type of variable of a target having reflection symmetry without bias caused by coherent antenna cross-polar coupling in an atmospheric radar. The method includes receiving backscattered radar signal measurements of the target from a receiver of the atmospheric radar, and generating a Coherency matrix from the backscattered radar signal measurements at a specific polarization transmission. The method also includes calculating a maximum eigenvalue λ1 and a minimum eigenvalue λ2 of the Coherency matrix. The method further includes calculating the meteorological variable from the maximum eigenvalue and the minimum eigenvalue, and generating an output signal of the property of the target corresponding to the calculated meteorological variable. The output signal may be a displayed radar image.

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For more information about this technology, contact Kimberley Elcess, (631) 344-4151.