◆ SpookStack

15 .---~------.---~-----. 1o , ! !, !104 ! Atla~ I IAS , -! -5 All f\1ode P1 1 , - ­ -, 10-6 1 ! ! -----! 10 ! ................ r......................1".....................r.............................................T.................. . - E C:- 5 I I I I ...............!...­....................,.......................1.......................;.......................i.................. . ~ c CCI .... -~ • l i ~-------~--------r------­ i -~--------, ! 1· i -----­ i ! i ,--t .,,,. ..... -r ­ - - ...,. - - - -+ - -­ - -i­ - ,~; ___' i -­ :o!s.. _: ­ [_-1:.~:-:i=-==~-l~:-~~1.::::.i.~= ! : ! : 0 . ____ I I I I -10 - ···- ' ........._ ....................................................,--·············.......... ­ : : 8 = 5,000,00Q A= 6.30 l -15 ....__....____ i _ _.___ __.___....__.....__ _ __, ! i -5 0 5 10 15 20 25 Downrange Distance (nm) Figure 21. Atlas HAS All-Mode Ship-Hit Contours with A = 6.30 6.2.4 Range Distributions of Theoretical and Simulated Impacts Earlier discussions had to do with how well the angular part of the Mode-5 impact density function could be made to agree with angular data derived from simulated random-attitude turns. A similar procedure was used to- test agreement between the range part of the Mode-5 impact density function and the simulated data. For this purpose, beginning at 15 seconds random-attitude turns were made at 2-second -intervals out to 279 seconds, assuming no breakup and breakup qcx:'s of 5,000 and 20,000 deg-lb/ft2. At each time, 2,000 trajectories and impact points were computed, giving a total sample of 266,000 for each breakup condition. For each impact point, the range from the pad was computed, and the total number of impacts calculated in 10­ mile range intervals out to 350 miles. Impacts beyond this range were placed in a single range category. The percentage of impacts in each range interval was then computed and plotted as shown in Figure 22. 9/10/96 58 RTI