7 we He ae Loa, YY fe. xo ae -e . og road ~ — ) Project 6.2 ~ Effects of Atamlo Fxplosions on the Yonosphere . MN. A. Newn Test ad TU The objegtive of Projost £.2 tc tc obtats tet: on the effects as of EB»:02 07 explosions on th: Yonosphere, Principally + to investigate the area of absorption probably due to the hign altitude ratiogativ>e marticles ani to stuly the effact of ortentatian relative to the earths magnetic fleld om Fo layer effects, DIeTnWr ATy . comes Two Ionosphere recomiess, type “=, oper:ting on pu’se transuission, installe? in 6 ton trailer wane, one Tooated at Tongerik 4¢>11 ani one locute! at Kusale in the Caroline Tslinds, me Tonosphere recorder, ‘ype “3, operating om pulre transmiasion, 4nstallet in a %97 olane base at “nivetok Tstair', "niweto¢ Atoll. Dets ei) at Tonosphere recorier site (Rongerik Atoll) eite (Kusule) AT/CPIA7, type “a2 Tonosrtere ereccier lth a power output of 10 Ke peak pulse sltorn.tely transaitting and reeclwing tutantically over the range of frequencies from) :0 75 mepacycles, This equijewnt measures am renoris at vertical incidence the virtual heicl* and critical fre queicies 2° fonizet rarions 2f the upper atmosphere, & fOP ohm multiple wire antenna Jesigned and erected Bo that the Alraction of maxtmm intensity of redietion will be at the desired vertical angl+ over all of the operating frequency range from] to °3 3 ga