VARIABILITY OF ROCKET-MEASURED WINDS.
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
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Variability of rocket winds has been investigated using as a statistic mean vector wind differences for various time intervals from less than one hour to 24- and 48-hour periods. In all cases the variability increases with height in the 30- to 60-km region. Using the method of least squares, a straight line is fitted to the data, which indicated no significant difference for easterly or westerly winds at any of the three locations White Sands, Pacific Missile Range, or Atlantic Missile Range now Air Force Eastern Test Range. The mean error between the regression line and the observed data is of the order of two meters per second. To improve the fit, a parabolic least squares fit was attempted, with a resultant mean error of approximately one meter per second. Further refinements are beyond the accuracies of the observations. Shorter period variabilities increase as the square root of the time up to approximately eight hours. For longer periods there is little increase with time. The deviations in the winds are investigated to determine the character of the variations, and the contributions of the eddies to the total kinetic energy are examined in the light of wind resistance. Author