Abstract: A sensitive laser method with fast response time has been developed which is suitable for measuringatmospheric water vapor concentration. The method utilizes the absorption of 33.02 and 27.972 pm radiationfrom a water vapor ...

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 ...

Abstract: The design and performance of a double-beam laser transmitter and receiver system is described. The transmitter consists of two cw helium-neon lasers, one working at 0.6328 ?m (used as a guide beam), and the other at 3.392 ...