Table 1.
Basic information regarding the GCR flux measurement data used in this study.
| Spacecraft | Instrument | Particle Type | Rigidity Range [GV] | Time Period |
|---|---|---|---|---|
| IMP-8 | GME1 | Proton | 0.56–1.07 | 1974-03 to 2001-09 |
| SOHO | EPHIN2 | Proton | 0.71–2.47 | 1995-12 to 2016-12 |
| ISS* | AMS-023 | Proton | 1.00–11.0 | 2011-05 to 2022-05 |
| Electron | ||||
Notes. Monthly averages of all GCR measurements are derived to match the time resolution of solar activity indices. GCR flux data affected by solar energetic particle events are excluded. The references related to GCR data are listed below. *International Space Station. (1) McGuire et al. (1986). (2) Kühl et al. (2016). (3) Aguilar et al. (2025).
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