Abstract: The design, construction and performance of a near-infrared atmospheric precipitation sensing device is described. An infrared light emitting diode was used to generate a sensing beam of 0.92 ?m wavelength. The collimated ...

Abstract: The performance and operation of an optical device to accurately measure extinction due to rainfall over a 100 m sample path is described. A collimated beam from an infrared light-emitting diode operating at 0.94 ?m is ...