amu -. 82 desired vertical angle over all of the operating frequency range frox 1 to 23 regacycles. The tranamitting and receiving artennas and the groum plane vere in mutual perperiicular planes with the plane of the transritting antenna oriented 53° to the east of mapnetic north. he a. ri ite (¢-“7 a e Same as for Rongerik ani Kusaie, excerpt that a C-12 lIorosphere recorder was used. This recorier is the same as the C-?, except for a few molifications ent isprovementa, b. The transmitting antenna in the C~°7 was a single wire delta fastere) to the lateral] extremities of the tail assembly. OPERATIONAL Groun4 stations at Fongerik and Kusate, using 15 secon! sveep operate? on vermal 24 hour schetule: z r 5 aweepe per hour until He15 wmirutes; thence continuous until H ¢ & hours; thence rcutine, Airvorne Station C-°7: Routine operation vnlil Aa-15 minutes; thence continuous usirg a 7C secor’ swecp tire until epproximately H # 5 hours. PESULTES Jonosphere stations at Fusale, Yongerik and the C-°7 airborne station operstet successfully4urirr this test, Kusaie: The efects obsery as. those observe? 4urirr for this teat were about the sare (CH! COFE®) except that the arrival time of the dieturbance in the F regior was approximately 5 mirutes earlier at H ¢ 27 wimutes. Rongerik: (CH PORES ). The ef ec’s were approxizately the same as “o> » BEST AVAILASLE COPY -~ 80 = — oA &>

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