YOKE DAY Location of Center of Rising AomicMOlg from H-hour until H-hour aplus 12.0 Minutes yououad w 7.0 RE 55 MIMVTES THAT WIND aCTED GN CLOUD AT EACR 5,000 FOOT LEVEL The greph of the azimuth angles of the primary cloud maces shows that the atomic rae) METHOD OF COMPUTING LOCATION OF CENTER OF ATOMIQ CLOUD TOP AT Tis IT QEACHED SIGHEST ALTITUDE cloud moved very little borisomtelly during the firet four aiestes. Because of the Folatively light winds st lower levele an4 the repid ries of the atomie sloud, wind date below 20,000 feet ave not bess oonsidered im these computations, The tine istervels gives below have been determined Ag the stomie elond wee seted upon by the upper winds during the 12.0 ainetes that 1: wee rising, the top of the cloud by @lviding the curve shows op the page Sa Alsplaced o ooagideruble distanes fros the test site by the tine that it reeched mariqve sititude. Wind soundiage were act obtained at H-hour, Therefore 18 te Beceasary te wee Sotimeted wind directions eng velocities besed on winds at | G400 and iodo boure, Theae eatimated wind date give 6 movensat of 6.8 miles in @ direction fren 207°, This imereace in distanse between the @loed and ths theodelite observation stations Mast be coseidered 1f the tree altitude af tee cloud ie to be ecustdered: ere dirested ln socordance with the spper OQ wind at the 5,000 foot level in question ted mhich are propertions] ia leagth to the times that the cloud required to pass through phe altitads iatervel. The redii of the cireles sre is nentical miles, eané the individual rectors ere idestified by figures signifying thousends of fess. Y ul an eulated by joining together veetors whieh ™ Tae position of the elowd bas been cal- n° 270* Rate o of A ¢ fata 5,000 foot segments, 2,500 feet om either aide ef the altitude ia Question, and reading eff the intersections of the plotted eurre with the tine orfinstes. These tine intervela are sogaidered to be the number Of minutes thet the upper winds acted an She eloed of each 5,000 feos level. sk, Miamten 20,000 {2.56 - 1.08) 5 0.48 25,000 (2.28 = 1.56) & 0.70 30,000 (3.28 ~ 2.26) » 1.02 34,000 (4.68 = 3.28) & bao 0,00 (5.99 = 4.68) o 1. 45,000 {7.28 = 3.99) = 1.29 $0,000 (9.23 = 7.28) « 1.95 33,060 (12.00- 9.23) = 2.77 Levorss OF VECTOMS DN MAITICAL MILES Altitote =«Boure Epoty Bautios] Biles 0,000 6.48/80 5g 105 25,000 on/io x 30,000 102/60 zg Je 33,000 4.40/60 an 40,000 le 1.31/60 De 4.29/60 Me 4.95/60 47a 2.77/60 Me 180° m-m Length of calculated vector — 6.8n. miles, -?8- direction from 207° "