A COMPARISON OF TECHNIQUES FOR THE SYNTHESIS OF 25 MILLIBAR HEIGHT AND TEMPERATURE FROM KNOWN DATA AT 100 MILLIBARS.
OKLAHOMA UNIV NORMAN
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Four approaches were taken toward devising means for synthesizing information on wind and temperature profiles at the altitudes of supersonic aircraft. Approach 1 AD-416 049 assumes that 24 km is an isopycnic level. Computer programs were written in Fortran for the solution, by quadrant and cubic methods and with the 1410 computer, of the equation for the temperature gradient and the resultant height and temperature from the temperature gradient. Approach 2 assumes isothermalcy between the 100- and 25-mb surfaces a Fortran program is given for obtaining the 25-mb height and temperature data. Approach 3 was statistical with climatological development of a vertical temperature gradient and led to a computer program and a refinement in Approach 4. Approach 4 led to a program that corrected the 25-mb computer temperature from a constant linear temperature gradient by a regression equation and used the corrected temperature for obtaining a new linear temperature gradient for computing the 25-mb height. Data for evaluating these techniques were obtained from stations listed in the U.S. Weather Bureau Northern Hemisphere Data Tabulations for 16 Feb to 15 May 1961 and also for Shemya, Alaska, for April 1961. The techniques were only partially successful or near failure.