eed) ALC BAENDAT INS Foro vmstramwntuliom ot Pec. TAMAR ars Vl.c.) fetsre Wl tee Seloautin as. vllered 2109 he inte rli.a wt Gtexe sewera: precerins BTe eat Pp .ete Sata. Pmotoelectric Recorsaing The possibility of usin; pnotemultialicrs ror absvlote measerement. of radiant enersy as described tn this report warrants consicerat:co. tuints of calibration, relative sinplicity of data reductica, The cer- iamewiacs of data, and the eugse of hendling this type of equipsent in the field are teviting qulities, imleed. 11.8.2 Diaseter versus Tix. The use of high-speed streak cazerus with lenseS is recugemed to record high-resolution diameter versus time. ft/sec, A writing speed of 150 ft/sec to 200 in combination with a narrow stilt (U0.Q8 iach), could cbesin cime reso- lution of the order of 1 ysec. 11.6.3 Motion Picture Coverage The use of several high-speed 35-mm ovtion picture cameras in the ranie of 1000 to 2000 trames/see is suggested for mre adequate early-time color photograpiia. Instrumentation should continue through 3 range of cameras lo equiarzent of the “pulse” txpe which could record extrene late-tise P phenomna. quip . REFERENCES 1. Bethe, H. A., Some Phenocena in High Altitude Explosions, LA-cl&, Los Alasos Scientific Labvratory, December 11, 1957. @. Maser, H. L., Earty distory of High Altitude Nuclear Exalasicns, AFSaC-iR- 3. Breve, H. L., and Cilmwre, F.R., Estimates of the Taeraal &sdiation iroa 57-16, Air Force Special seapons Center, May 31, 1957. Nuclear Weapons Burst at High Altitudes, RM-1963, RAD Corporation, Septecber wn a. 1557. ¢ 3Brode. da. Le, and Meserotc, Hd. £., Thersal Radiaticn ir.a ac mic 2 Ciens at Titres Near 3reaxawas, RM-1E51, RAND Corpraticn, Asset 1356. Pricecdicgs of che High Altitude Syepositn, January 27-26, 1555, 0-57-53, ‘Werations Research Office. Jeans ikpeins Universit... Say ist