KM fp ete 15.+3h 28M 29.+3h 33M. 800 -~—-——1- 600 400a 1399358 200 '32.43h 49M 800 600 ‘400 200 2 3 4 Ss 68 9 14 MC 2 3 4 6 8 10 14 wc Figs 3011 - Icnospheric Records at Rongerik Following Shot 1 (left) and Shot 2 (right) by about 3 1/2 to 4 br, Showing Stratification of F2 into Two Distinct Layers .