00000nam 2200000zi 4500 9.956860 CaOODSP 20251030093301 m o d f cr bn||||||||| 251029s1964 oncdb ob f000 0 eng d CaOODSP eng rda CaOODSP En57-56/500-1964E-PDF Wankiewicz, Anthony Cyril, 1945- author. Astronomical seeing conditions and clear air turbulence / Anthony Wankiewicz. [Toronto, Ontario] : Department of Transport, Meteorological Branch, 1964. 1 online resource (8 pages, 5 unnumbered pages) : map, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier TEC ; 500 Digitized edition from print [produced by Environment and Climate Change Canada]. "Circular 3965." "13 Jan. 64." Includes bibliographical references (page 8). "A decade of extremes of astronomical seeing is studied in connection with atmospheric conditions. An attempt is made to relate seeing to turbulence parameters, especially those parameters favouring turbulence at tropopause levels. The gravity wave-vertical shear mechanism is found to be significantly related to poor seeing conditions, suggesting that clear air turbulence is strongly involved in poor astronomical seeing"--Abstract. Clear air turbulence. Astronomy Observations. Turbulence en air limpide. Astronomie Observations. Canada. Meteorological Branch, issuing body. TEC ; 500. (CaOODSP)9.934253 PDF 619 KB https://publications.gc.ca/collections/collection_2025/eccc/en57/En57-56-500-1964-eng.pdf UDC 551.510.61; 551.511.6; 551.510.528