Topical Issue - Space Weather Instrumentation
Open Access
Technical Article

Table 1

Characteristics of Syowa NM and MD. Pc of NM is calculated for vertical direction.

Directional channel Cutoff rigidity
Median rigidity
Asymptotic directions @ Pm Correction coefficient
Average count rate
Pc (GV) Pm (GV) β (%/hPa) ×104 (counts/hr)
Syowa NM
 Omni 0.4 16.3 30°S38° E −0.76 31.8 (total)
Syowa MD
 V 53.6 56°S53° E −0.16 26.9
 N 58.5 29°S35° E −0.16 3.8
 S 58.5 70°S115° E −0.16 3.8
 E 58.5 32°S81° E −0.16 6.4
 W 58.5 60°S8° W −0.16 6.4
 NE 63.6 16°S60° E −0.15 1.0
 NW 63.6 34°S4° E −0.16 1.0
 SE 63.6 42°S110° E −0.16 1.0
 SW 63.6 80°S77° W −0.16 1.0

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