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Fig. 2.46.15. Correlation coefficient ^(Ref, Adr, Xo ) in dependence from Xo at different values of drift modulation amplitude Adr from 0 (no drift correction) to 0.40 for alpha-particle fluxes in energy interval 330-500 MeV during solar cycle 22. From Dorman et al. (2005c).

Fig. 2.46.15. Correlation coefficient ^(Ref, Adr, Xo ) in dependence from Xo at different

-»-Adr=0, ^>Adr=0.05, -*-Adr=0.10, -o-Adr=0.15, -•-Adr=0.20, -*-Adr=0.25, -«-Adr=0.30, -x-Adr=0.40

-»-Adr=0, ^>Adr=0.05, -*-Adr=0.10, -o-Adr=0.15, -•-Adr=0.20, -*-Adr=0.25, -«-Adr=0.30, -x-Adr=0.40

From Fig. 2.46.15 it can be seen that with increasing of Adr from 0 to 0.40 the maximum of correlation coefficient changes from about 8 av. months to 35 av. months. The value of maximum of correlation coefficients Ref,Adr,Xo )

increases with increasing Adr up to Adr = 0.10, then it decreases. The curves of Fig. 2.46.15 can be approximated by parabolas with correlation coefficients higher than 0.999:

v(ef, Adr, Xo )= « (Ref, Adr ) + bR, Adr ) + (, Adr ), (2.46.30)

where coefficients a, b, and c are given in Table 2.46.3 together with Xomax = -2b(Ref,Adr)ja(Ref,Adr) and Ymax determined on the basis of Eq.

^max (Ref, Adr )= 2b2 (Ref, Adr )((, Adr )+ cRf, Adr ) (2.46.31)

Table 2.46.3. Coefficients a, b, and c, and values of Xomax (in av. months) and maximal correlation coefficient Ymax for different values of Adr from 0 (no drift corrections) up to 0.40. From Dorman et al. (2005c).

Adr

a

b

c

Xo max

1max

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