AN INVESTIGATION OF SEMI-DIURNAL FLUCTUATIONS OF WINDS AT AN ALTITUDE OF TEN KILOMETERS
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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The 10-km winds during a 100-day period from 1 November 1959 through 8 February 1960 observed at 15 stations were extracted from the Northern Hemisphere Data Tabulations. Nine of these stations recorded the 10-km wind at 0000Z, 0600Z, 1200Z, and 1800Z with reasonable regularity each day. The other six stations observed the 10-km wind at 0000Z and 1200Z only. As a maximum of only four observations per day presents considerable impediment to SATISFACTORYANALYSIS OF A SEMI-DIURNAL OSCILLATION, THE STATIONS WERE SELECTED IN A SPATIAL RELATIONSHIP DESIGNED TO INDICATE THE WAVELENGTH OF THE OSCILLATION. Also a period was chosen to provide relative constancy of certain solar tidal parameters. The period selected is symmetrical to the northern hemisphere winter - the suns declination progressing from about 15 degrees south on 1 November through the solstice on 22 December and back to about 15 degrees south on 8 February. The location of the stations was such that they extended over about 180 degrees of longitude with the goal of encompassing spatially one complete semi-diurnal wave.