1. Department of Physics; National Institute of Polar Research (NIPR); 10-3 Midoricho; 190-8518; Tachikawa; Tokyo; Japan
2. Department of Physics and Astronomy; State University of New York at Geneseo; 1 College Circle; Geneseo; 14454-1401; NY; USA
3. Nippon Meteor Society; 2-16-8 Mikunihonmachi; 532-0005; Yodogawa-ku; Osaka; Japan
4. Nippon Meteor Society; 43-2 Asuka; 583-0842; Habikino; Osaka; Japan
5. Institute for Cosmic Ray Research; Univ. of Tokyo; 5-1-5 Kashiwa-no-ha; Kashiwa City; 277-8582; Chiba; Japan
6. National Astronomical Observatory of Japan; 2-21-1 Osawa; Mitaka; Tokyo; 181-8588; Japan