1 hr 54 min - Es trace remains wusually thick, (first faint traces of Fl are near 4 m) 2 hr 23 min = several levels of Es including one at higher frequencies (at 18C km) which may be an oblique re- turn; (Es continued unusual for 45 min more) 24+in dau 21.4+39M Ke eh “a? re .22.482M;, Soc Pu TE: PEt Ee 25.4th Sam. - 600 400 = 200 (ee 23. 41h13M - 2 8 ae Bt 26.42h23M 2 38 4 €° 8 0 4 wm Fig. 3.7 - Ionospheric Records at Rongerik Following Shot 2 by 39 min to 2 he 23 min, Showing Unusual Sporadic-E Effect? 31 SECRET