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Time-dependent cosmic ray modulation

Ferreira, S. E. S.; Potgieter, M. S.; Engelbrecht, N. E. +2 more

Time-dependent cosmic ray modulation is calculated over multiple solar cycles using our well established two-dimensional time-dependent modulation model. Results are compared to Voyager 1, Ulysses and IMP cosmic ray observations to establish compatibility. A time-dependence in the diffusion and drift coefficients, implicitly contained in recent ex…