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We calculate Eq. 1.14.27 numerically for robs = r1 = 1 AU = 1.5 X10ljcm, b = 0.13, 0.30, 0.45, p=2°, 10°, 45°, 90°, and 178°, and a(ey, t ) = 0 (no modulation), and a(ey,t)= 0.2, 0.4, 0.8, 1.6, 3.2, 6.4 and 12.8. The case EY > 100 MeV corresponds to RYP> 2 GV which means a(ey , t)< 0.2 at the minimum of solar activity and a(Ey, t )< 1.2 at the maximum of solar activity. The dependence on b is sufficient only for a(Ey,t)> 6.4 ; in other cases G is about the same for b = 0.13, 0.30, and 0.45. In Table 1.14.1 we show values G(robs,p,k,A), sufficient for cases of generation gamma rays with Ey> 100 MeV (corresponds to A < 1.2) and for

Table 1.14.1. The parameter G(robs,p,b,A) (in cm) according to Eq. 1.14.27 for robs = 1 AU, b = 0.3 as a dependence on p and of a(ey, t) (characterize both the effective Ey and the level of solar activity).

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