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公开(公告)号：CA2780555A1
公开(公告)日：2013-04-25
申请号：CA2780555
申请日：2012-06-21
Applicant: ROSEMOUNT AEROSPACE INC
Inventor： RAY MARK D , HALAMA GARY E , ANDERSON KAARE J , NESNIDAL MICHAEL P
Abstract: In one aspect, methods of determining a size distribution of water droplets in a cloud are described herein. In some embodiments, a method of determining a size distribution of water droplets in a cloud comprises sampling a depth of a cloud with a beam of electromagnetic radiation, measuring echo intensities of the electromagnetic radiation returned from the cloud with a detector, determining a measured optical extinction coefficient from the measured echo intensities, determining a measured backscatter coefficient from the measured echo intensities, determining a lidar ratio from the measured optical extinction coefficient and the measured backscatter coefficient, determining from the lidar ratio a value pair comprising a shape parameter (µ) and median volume diameter (D MVD) of the water droplets, and determining a size distribution of the water droplets using the value pair (µ, D MVD).
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公开(公告)号：AU2010202220B2
公开(公告)日：2012-03-22
申请号：AU2010202220
申请日：2010-05-31
Applicant: ROSEMOUNT AEROSPACE INC
Inventor： RAY MARK D , NESNIDAL MICHAEL P
Abstract: IN-FLIGHT MULTIPLE FIELD OF VIEW DETECTOR FOR SUPERCOOLED AIRBORNE WATER DROPLETS An airborne multiple field-of-view water droplet sensor includes an illumination portion and a detection portion. The illumination portion includes a first optical beam emitter configured to output a light beam. The detection portion includes a kaleidoscope configured to channel a first portion of the backscattered light towards an inner reflective surface of a circle-to-line converter, a multiple field of view subsystem having at least a first detector configured to receive light reflected by the circle-to-line converter, and a single field-of-view subsystem configured to receive a second portion of the backscattered light, the second portion not having been reflected by the circle-to-line converter. The single field-of-view subsystem may include a dual channel circular polarization detector for distinguishing between liquid water droplets and ice crystals based on information in the single field-of-view. Clj cc (D ou cc =3 Cl- CL C'M Lo co U o .4- I= C%4 (D .s .4= J C:L c) L9-j, Cj CM cis cc CM cm d Cl C=
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