Hail Photography: An Example of the Use of High-Speed Techniques under Adverse Conditions

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 84, No. 1, pp. 18–24
Abstract: High-speed photographic techniques have been used to record the aerodynamics of natural hailstones falling near the ground. Two photographic systems were employed: a high-speed 16mm camera with two 1,200-W light sources and a pair of motor-driven 35mm cameras with stroboscopic illumination. Exposure time had to be on the order of 100 μs or less with Tri-X film. Both systems were powered by a portable 3-kW gasoline-powered generator. One or the other of these systems was deployed in several hailstorms during the summers of 1973 and 1974. The photographed stones were allowed to impact in a sawdust-filled box and were stored in a portable freezer for subsequent analysis. A hailpad consisting of a styrofoam square covered with aluminum foil was also set out during the photography to record size distributions and collision energies. Some preliminary results obtained for the films, the advantages and disadvantages of the two systems, and the techniques used to facilitate high-speed photography under the adverse conditions typical of severe hailstorms are examined.
Publication Date: 1975-01-01
DOI: 10.5594/J13424
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J13424
Author(s): E. P. LozowskiDept. of Geography, Univ. of Alberta, Edmonton, Alberta T6G 2H4, Canada.
M. M. OleskiwDept. of Geography, Univ. of Alberta, Edmonton, Alberta T6G 2H4, Canada.
T. M. MorrowDept. of Geography, Univ. of Alberta, Edmonton, Alberta T6G 2H4, Canada.
Copyright: © 1975 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

Carte A. E. Roos D. V. D. S. , 1973 : “The falling behaviour of oblate and spiky hailstones,” Jour, de Recherches Atmosphériques , 7 : 39 – 52 . EXTERNAL
Knight G. A. Knight N. C. , 1970 : “The falling behaviour of hailstones,” Jour, of the Atmospheric Sciences , 27 : 672 – 681 . EXTERNAL
List R. , 1971 : Personal communication. EXTERNAL

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E. P. Lozowski, M. M. Oleskiw, and T. M. Morrow; Hail Photography: An Example of the Use of High-Speed Techniques under Adverse Conditions, Journal of the SMPTE ( Volume: 84, Issue: 1, January 1975); SMPTE, 1975. Available at https://doi.org/10.5594/J13424

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E. P. Lozowski, M. M. Oleskiw, and T. M. Morrow; Hail Photography: An Example of the Use of High-Speed Techniques under Adverse Conditions, Journal of the SMPTE ( Volume: 84, Issue: 1, January 1975); SMPTE, 1975. Available at https://doi.org/10.5594/J13424

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<span class="citation">E. P. Lozowski, M. M. Oleskiw, and T. M. Morrow; <cite>Hail Photography: An Example of the Use of High-Speed Techniques under Adverse Conditions</cite>, Journal of the SMPTE ( Volume: 84, Issue: 1, January 1975); SMPTE, 1975. Available at <a href="https://doi.org/10.5594/J13424" target="_blank" rel="noopener">https://doi.org/10.5594/J13424</a></span>

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<li>
E. P. Lozowski, M. M. Oleskiw, and T. M. Morrow; <cite id="bib-10-5594-j13424">Hail Photography: An Example of the Use of High-Speed Techniques under Adverse Conditions</cite>, Journal of the SMPTE ( Volume: 84, Issue: 1, January 1975); SMPTE, 1975
<span class="doi">10.5594/J13424</span>
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