Ki 1.434 OM 800 ~ 600 = 400 200 KM. 2.442'4M 800+ 600 400 200 KMS 600 400 200 2 3 4 6 8 10 @ «0M 2 3.64 6 8 10 14 uc Fig. 3.5 - Ionospheric Records at Rongerik Following Shot 1 by 34 1/2 to 55 min, Showing Sporadic-E Development 59 min - a picture typical of this period showing a strong lower boundary and considerable scatter above 1 hr 18 min - two principal levels of Es (also first indications of Fl at 200 to 300 km, 3 to 4 mc) 1 br 27 min =~ Es continues strong but Fl is "seen" through it 1 hr 45 min - Es continues wmusual, (Fl ordinary and extraordinary are clear but "spread") 1 hr 59 min - Es less complicated but still unusual, (Fl returns show continued turbulence) 2 br 14 min ~ Es still present, (Fl appears to be stra*i- fied ~ it later developed into F2). 29 SECRET ,