Accession Number : AD0417441

Title :   MESOSPHERIC WINDS FROM 23 SUCCESSIVE HOURLY SOUNDINGS,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : enhard,Robert W. ; right,John B.

Report Date : JUL 1963

Pagination or Media Count : 81

Abstract : Wind information between 30 and 70 km was ob tained from 23 successive hourly rocket sound ings. The sensor was a 1-m mylar balloon (ROBIN) tracked by FPS-16 radar. Equations for the com ponent wind speed are developed from the basic equations of motion of the balloon and appropri ate simplifications. The balloon velocities and accelerations from which wnds are derived are obtained by linear smoothing techniques applied to radar-observed position and derived velocity data. The smoothing technique is described in detail. This data reduction process yields wind with an rms vector error of 2 mps at the top of the sounding, decreasing as the balloon falls so that a representative value is about 1 kt. The errors increase in the case of an uninflated balloon to 5 mps maximum and 5 kt for the repre sentative value. The variance of the observed winds is largely accounted for by diurnal and semidiurnal oscillations. The amplitude of the oscillations increases with altitude and is greater for the diurnal than for the semidiurnal oscillation. These oscillations result in a greater lag variability of wind at 8 to 12 hr than at 24 hr lag. Comparison of the residual variance at several levels suggests the existence of a turbulent zone in the upper ozonosphere. (Author)

Descriptors :   (*ATMOSPHERES, SOUNDING ROCKETS), (*ATMOSPHERIC SOUNDING, WIND), (*ATMOSPHERIC, MEASUREMENT), METEOROLOGICAL RADAR, RADAR TRACKING, BALLOONS, ATMOSPHERE MODELS, VELOCITY, DIURNAL VARIATIONS, STRATOSPHERE, EXPERIMENTAL DATA, ERRORS, TABLES(DATA), SPHERES, FALLING BODIES, HARMONIC ANALYSIS, OSCILLA, METEOROLOGICAL BALLOONS, METEOROLOGICAL

Distribution Statement : APPROVED FOR PUBLIC RELEASE