eee eet ewe eee 500 Em Apparent Height eee e eee eee eee 3.18 Imospheric Records at Rongerik Following Shot 4 by 73 to 95 min, Showing Clearly Oblique Echoes and Trend Toward Normalcy eoeoneveveve eee @ 319 Apparent Minimum Height of Groups of Echoes at Rongerik from 40 to 95 min after Shot 4, with Fitted Hyperboli: Curves oeceeeeerev eee F eee & 3017 eee Ionospheric Records at Rongerik Following Shot 4 by 57 to 70 min, Showing Echo Rising from 350 to & by 40 to 55 min, Showing Weak and Irregular F2 Echoes «ee & 3216 Ionospheric Records at Rongerik Following Shot 4 1 3/4 to 3 1/2 hr (F2 Higher with Critical Frequency Less than Normal) eevee eve eee @ 3021 Ioncspheric Records at Rongerik Following Shot 5, &B 320 Ioospheric Records at Rongerik Following Shot 4 by Showing Occasional Appearances of F2 Traces « « 3022 Icnospheric Records at Guam Following Shot 1 by 3 hr 35 min to 5 hr 45 min, Showing Early Possible Effects and Leter Probable Effects ....«-eee 3023 Iomospheric Records at Guam Following Shot l by 3e24, 6 hr 15 min to 10 hr 15 min, Showing End of Effects and Return to Normal <2 we ee seve Icmospheric Records at Guam at 1000 hours of Normal Days Following Shot 1 eooeoevneesveve 3025 Imospheric Records at Guam Following Shot 2, Showing Early Possible Effects and Lator Probable 54 a ee a ee ee ee 2 2 rr 55 Showing Probable Sunrise Effect ..e«eceesee 56 Showing First Period of Effects « ««ececsve 57 Effects 3.26 Imospheric Records at Guam Following Shot 5, 3027 Ionospheric Records at Guam Following Shot 5, 3.28 Ionospheric Records at Guam Following Shot 5, Showing Interval of Normalcy and Second Period of Effects «ce cecceccrcecerevveeveaeeve 3029 Ionospheric Records at Okinawa Follering Shot 5, Showing Possible Effects . e«e«eecessteecove 3030 Ionospheric Records at Maui Following Shot l, 58 59 Showing Early Possible Effects and Start of Definite Effects 2. 2. eeswccevecvsecevene 3o31 Ionospheric Records at Maul Follewing Shot 1, 3032 Ionospheric Records at Maui Following Shot 2, Showing Definite Effects eseeveee eee 6 6 Showing Possible anc Definite Effects ..-.«.e Showing Possible and Definite Effects ... 3033 Iomospheric Hecords at Maui Following Shot 5, 14, SECRET 63