MERErcxarcey yy Projeot 6.3 - Bffects of Atomic Explosions on the Ionosphere - HM. Nawn SBIECTIYE The objective of Project 6.3 ie to ot-ain deta on the effects of high yielé suclear explosione or the Ionosphere, Prinicipally, to investigate the area of sbeorption, probably due to the high altitude radioactive particles, and to study the effect of orientation relative to the earth's magnetic field on F2 layer effects. TESTERS The aysten comprises: fvo Tonosphere recorders, type G2, opersting on pulee tranauissicn, installed in 6 ton treiler vans, one located at Rongerik Atoll and one located at Kuseie in the Caroline Islands, , Que Ionosphere recorder, type C-3, operating on pulee trensmisaion, installed in a C97 plane besed at Enivetok Ialand. Detailed Description: Ionosphere recorder site (Rongerik Atoll) site (Kueaie) AN/CPQ-7, type C22 Ionosphere recorder with a power output of 10 EW peak pulse alternately trangitting and receiving automatically over the range of frequencies from 1 to 25 megacyoles. This equipsent messures and records at vertical] incidence the virtual height and critical frequencies of donised regions of the upper atmosphere. & G00 obm multiple wire antenna designed and erected so that the Girection of maximus intensity of radiation will be at the desired verticel angle over all of the opersting frequency range from l to 23 megacyoles. 7 2 in we PhRY te eye BES T AM ee wee NBL ow 4s PY -17- EDO! “'SANDIA RC