Topical Issue - Space Weather Instrumentation
Open Access
Technical Article

Fig. 14

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Hourly count rate variations observed by (a) Thule NM (THUL), (b) South Pole NM (SOPO), and (c) Syowa NM (SYO NM). NM at northern and southern high-latitudes show different variations. To see contributions from the GCR density and the north–south anisotropy separately, we plot the average and difference between NMs at northern and southern high-latitudes in panels (d) and (e). Orange and blue solid circles in panels (d) and (e) show the average and difference in THUL and SOPO pair and THUL and SYO NM pair, respectively. Tick marks on the horizontal axis are at one day intervals.

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