we (6) Tse greatest observed wertical shear was 260 knots ih 300 feet. Tne sase observation and aleirule of 227,000 feet indicated a sazxins viol of 2t6 maots Irce icv degrees. In the come from 150,000 to 150,000 feet, wimis were relarively stable easterlies with aoderate speeds, generally 50 to 100 kpots. Turdulesce appears to be 20 2 minicom anid wertical shears are very saall. Poth of these wariables are less than those usually recorded in the troposphere (below 40,000 to 60,000 feet). These data seew Co substantiate the usual concept of this layer, i-e., it is of great stability where temperature increases | with beight. Based on chese data, extrapolation upward froa winis deterained frou ballooa observations ac their maximo altitude (120,000 to 140,000 feet) “would provide ap accurate wind estimate to approximately 160,000 feet. REFERENCES 2. Banister, J. R., A Computation of the Sampler Performance for Shots Teak apd Orange of Operation Hardtack, SC-41T2(TP), Sandia Corporation, December 1, 1958. Bethe, H. A., Some Phenomena in High-Altitude Explosions, LA-2164, Los Alamos Scientific Laboratory, December 1957. Mayer, H. L., Early Yistory of Sigh Alcitude Nuclear Explosions, AFS®C- TR-57-16, Aeronutronic Systeas, Inc., May 1957. o Capabilities of Atomic weapons, IM 23-200, Samuel Classtone, Editor, Department of the Aray, Mavy, and Air Force, June 1, 1955. Kennard, E. H., Kinetic Theory of Gases, The McCraw-Hill Book Company, New York, 1938. Notes and Tables for Use in the Analysis of Supersonic Flow, NACA-TN-1428. Force, C. T., Characteristics and Perforsance of a Deacon-Arrow Rocket System, SCIM 79-58(51), Sandia Corporation, July 1958. Murgatroyd, R. J., Winds and Tesperatures Between €0 ko and 100 kn A Review, Quart. J. Roy. Meteorol. Soc., 83, October 1957, p. 417. Ludlaa, F. H., Noctilucent Clouds, Tellus, Vol. 9, No. 3, August 1957. Stormer, C., Height and Velocity of liminous Night Clouds Observed in Norway, 1932; Publ. 6, Univ. Obs. Oslo, 1933. Mitra, S. K., The Upper ACousphere, Monograph Series, Vol. 5, The Asiatic Society, Calcutta, 1952. Goody, BR. M., The Physics of the Stratosphere, Ca=bridge Monographs on Physics, Cambridge University Press (Acerican Branch, New York), 195. Stolov, H. L., Tidal dind Fields in the Atcosphere, J. Metecorzl., LE, No. 2, April 1955. Chapnan, S., Atamospreric Tiges and Oscillatisns, Conpemliua vf Xctevrol., Am. Met. Soc., Boston, 1551, pp. 510-520. CTY

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