' 3°o "7 = SHOT 4 i z ! 4007- { =z 2 < OO re a cet wee wf x a 2300 oo aa ann me me eo a ow no | 3 ~- @ AXIMUM NORMAL > MEDIAN NORMAL MINIMUM NORMAL lof MINIMUM NORMAL MEDIAN HORMAL MAXIMUM NORMAL od — . - -” eo on CRITICAL FREQUENCY (MC) oN $ i L i j 2 i 3 ak. 1 4 a i 6 l 7 ELAPSED TIME AFTER DETONATION (HRS.) Fig. 3.15 = F2-layer Virtual Height and Critical Frequency at Rongerik Following Shot 4, Compared with Maximun, Minimum, and Median Normal Valuss R SECRET } 8