A sequential flash for photographing trajectories of saltating particles

TitleA sequential flash for photographing trajectories of saltating particles
Publication TypeConference Proceedings
Year of Conference1989
AuthorsBird, K. G., and Jairell R. L.
Conference Name57th Annual Western Snow Conference
Series TitleProceedings of the 57th Annual Western Snow Conference
Date PublishedApril 1989
PublisherWestern Snow Conference
Conference LocationFort Collins, Colorado
KeywordsElectronic flash, Photographs, Saltating snow, Sequential time intervals

To obtain statistically useful samples of the maximum heights attained by saltating snow during drifting, several thousand particle trajectories must be measured. This paper describes the light source for photographs of sufficient quality that computer analysis can determine heights automatically. The method uses eight small electronic flash units fired in sequence through color filters, with the light focused through a single lens. Since the number. color and interval between flashes can be varied, the device could be used for other studies where object position or speed is of interest.