MEASUREMENT OF FALLING MOTION OF SNOWFLAKES USING CCD CAMERA

The horizontal and vertical falling motions of snowflakes were imaged by two CCD cameras. These images were analyzed by an image processor and a computer. The size and position of each snowflake were measured every 1/30 s from their two images. There were three patterns in falling motion of snowflak...

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Bibliographic Details
Main Authors: ムラモト ケンイチロウ, マツウラ コウキ, シイナ トオル, エンドウ タツオ, コニシ ヒロユキ, Ken'ichiro MURAMOTO, Kohki MATSUURA, Toru SHIINA, Tatsuo ENDOH, Hiroyuki KONISHI
Format: Report
Language:English
Published: Department of Electrical and Computer Engineering, Faculty of Technology, Kanazawa University 1992
Subjects:
Polar meteorology and glaciology
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3739
http://id.nii.ac.jp/1291/00003739/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3739&item_no=1&attribute_id=18&file_no=1
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Summary:The horizontal and vertical falling motions of snowflakes were imaged by two CCD cameras. These images were analyzed by an image processor and a computer. The size and position of each snowflake were measured every 1/30 s from their two images. There were three patterns in falling motion of snowflakes : rotational motion, swing motion and straight motion. The angular velocity of smaller radii of rotational motion was faster than that of larger ones. On the other hand, the radius of rotational motion didn't depend on snowflake size.

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