| / couple of cases) by hand clinometer, and the m. taken by Air Weather Service personnel by theodolite. These two sets checked very well in all cases except Charlie cloud. On the graph, the average of the tro is indicated by the circled dot, with tne outriggers shoving the values themselves. de Cperation Three surface vessois and three aircraft vere engaged in making cloud rise and height measuremcnis of like cloude Of these, one vesse! falled.to make any height measurements until H # 2) min., and one airplane rad only one measuretuent, at upproxintely H + 40 sec, before H*+5 ming It is not believed that timing was very accurate on this measurement s0 it was discarded. The cther measurements shored the cloud te have :=:reached maxircum altituce et 3 minutes so in addition to the 3 minute everige an everage wes. obtained using earlfer measurenentse Cince there is reason to Lelieve the race to decrease in the stratosphere (abuve 5&COU ft on Make cay) the second average \.as taken of ohsexvations bejow that height. on the grophe The twe averages are shovm as herizontal lines : (1) Three minute heights: U.S.S Curtiss 100,500 fte U.S.SeRendova Aireraft No. 1 (De. Urry) Aiseraft Now 2 (Col. Fee) Average (2) 117,0G0 fte 111,C00 <t. AE7,i00 ite 114,000 ft. in Smine _ Extrepelatiion ef tropcsphere rates: U.SeSe Curtiss 46,600 ft. at l ming 139,800 ft/S Aircraft No. 1 58,200 ft. at He mine 116,400 £4/2 U.S.S. Renduva Ne early meusurenents Airereit Now 2 No early measurements Average 128,100 ft/2 Three surface vessels and two aircraft made measurements of the King clov and all data are on hand except that from one surface vessel. ‘the three rinute heights are as zscllowss UsSeSe Oak 1411 5E,300 UsSeS. Rencove Aircraft No. 1 (ir.Singlevich) Aircraft Noe % (Col, horris) Averege 56,100 56,300 53,000 209400 (Douktful) The average is plotted on the graph. 4. Considerable improvement in this relationship might well result from more accurate determination of the rate of rise and in particular of the maximm rate, and from develepment of a correction factor fer variations in the ambient <ir lapse rete of temperature. Pe We ALLER f~ \ le —“~ . } to, aN Loe 1s Atchmt v Chart - a 5 LC |