Department of the Air Force Report, 1996

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Table 1. Effects of Mode-5 Shaping Constant A on Atlas IIA Risks
B= 1,000
Percent of Mode-5
IPs Uprange
28.6
Casualty Expectancv (x 10°') inside ILLs
Modes
Total for all Modes
246
259.9
Constant A
2.5
3.0
3.5
4.0
20.7
14.6
10.0
136
149.4
58.9
72.7
30.5
44.3
The results in·the third column are directly proportional to the probability that a Mode­
5 failure occurs. For the Atlas IIA analysis, a value of 1/200 = 0.005 was assumed.
Case 2: Risk Contours for Atlas IIAS
Definitions of Flight Hazard Area and Flight Caution Area may be based on the risk
contours for inner-ear injury. Constant A can have a significant effect on the location of
the 10-6 contour, as illustrated in Figure 2 and Figure 3 for the Atlas IIAS. For these
figures, the Mode-5 absolute probability of occurrence was 0.005, constant A was 3.0
and 3.5, and constant B was 1000.
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RTI