Earth, Planets and Space

Table 1 Number of data events processed from October 1989 to September 1997

From: Statistical study on propagation characteristics of Omega signals (VLF) in magnetosphere detected by the Akebono satellite

	Dawn	Day	Dusk	Night	Total
1989	95,854	92,003	14,297	11,001	213,155
1990	48,231	76,448	89,670	59,446	273,795
1991	91,456	71,240	92,925	79,300	334,921
1992	117,240	104,322	92,652	94,576	408,790
1993	108,802	115,379	93,782	74,649	392,612
1994	105,783	88,317	88,951	91,894	374,945
1995	72,069	105,293	97,962	58,127	333,451
1996	92,192	81,758	88,379	68,660	330,989
1997	92,197	86,643	102,857	86,259	367,956
Total	823,824	821,403	761,475	623,912	3,030,614

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