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Program: BS. Objective: Technology. Type: Comsat. Overview: Medium-scale broadcasting satellites for experimental purposes and communications to Japanese home islands.
Major Events:

  • 1978 April 7 - Yuri 1.  Spacecraft: Yuri. Mass: 678 kg (1,494 lb). Launch Site: Cape Canaveral. Launch Vehicle: Delta.

    Experimental comsat. Medium-scale broadcasting satellite for experimental purposes (BSE). Launch vehicle Delta 2914-140. Launch time 2201 GMT. Location 110 deg E. Characteristics of satellite: Weight approx 355 kg in an early stage in orbit. Configuration - box shaped satelli te with 2 solar array panels with overall span of 8.95m. Height 3.09m, width 1.32m, length 1.19m. 3-axis stabilized attitude control. Expected life 3 years. Positioned in geosynchronous orbit over the Indian Ocean at 110 deg E in 1978-1982 As of 4 September 2001 located at 44.59 deg E drifting at 0.116 deg E per day. As of 2007 Mar 11 located at 108.19E drifting at 0.031E degrees per day.

  • 1984 January 23 - Yuri 2A.  Spacecraft: AS 3000. Mass: 670 kg (1,470 lb). Launch Site: Tanegashima. Launch Vehicle: Delta.

    TV. BS-2a (Yuri-2a). Domestic satellite broadcasting; development of broadcasting satellite technology. Launch 0758 GMT. N launch vehicle flight no 12. Launching organization NASDA. Positioned in geosynchronous orbit at 110 deg E in 1984-1985; 108 deg E in 1985-1987; 110 deg E in 1987-1988 As of 28 August 2001 located at 69.57 deg E drifting at 4.403 deg W per day. As of 2007 Mar 10 located at 153.52W drifting at 4.395W degrees per day.

  • 1986 February 12 - Yuri 2B.  Spacecraft: AS 3000. Mass: 677 kg (1,492 lb). Launch Site: Tanegashima. Launch Vehicle: Delta.

    Stationed at 117 deg E. BS-2b (Yuri-2b). Domestic satellite broadcasting; development of broadcasting satellite technology. Launching organization NASDA. N launch vehicle flight no 14. Launch time 0755 GMT. Positioned in geosynchronous orbit at 110 deg E in 1986-1991 As of 5 September 2001 located at 13.60 deg W drifting at 3.524 deg W per day. As of 2007 Mar 11 located at 77.04E drifting at 3.551W degrees per day.

  • 1990 February 22 - BS 2X.  Spacecraft: HS 376. Launch Site: Kourou. Launch Vehicle: Ariane.

  • 1990 August 28 - Yuri 3A.  Spacecraft: AS 3000. Mass: 1,115 kg (2,458 lb). Launch Site: Tanegashima. Launch Vehicle: Delta.

    Japanese DBS; 110 deg E. Continuation of broadcasting services by BS-2; accommodations to increasing and diversifying demands for broadcasting; establishment of common technology necessary for broadcasting satellite. Launching organization NASDA. Launch time 0905 GMT. BS-3a 'Yuri -3a'. Positioned in geosynchronous orbit at 110 deg E in 1990-1998 As of 2 September 2001 located at 84.62 deg E drifting at 5.278 deg W per day. As of 2007 Mar 10 located at 83.70W drifting at 5.275W degrees per day.

  • 1991 August 25 - Yuri 3B.  Spacecraft: AS 3000. Mass: 1,115 kg (2,458 lb). Launch Site: Tanegashima. Launch Vehicle: Delta.

    TV; 110 deg E. Positioned in geosynchronous orbit at 110 deg E in 1991-1999 As of 3 September 2001 located at 91.59 deg E drifting at 5.350 deg W per day. As of 2007 Mar 9 located at 152.69E drifting at 5.334W degrees per day.

  • 1994 July 8 - Yuri 3N.  Spacecraft: AS 3000. Mass: 1,210 kg (2,660 lb). Launch Site: Kourou. Launch Vehicle: Ariane.

    Stationed at 109.67 deg E. Positioned in geosynchronous orbit at 109 deg E in 1994-1999 As of 5 September 2001 located at 109.71 deg E drifting at 0.013 deg W per day. As of 2007 Mar 11 located at 109.92E drifting at 0.008W degrees per day.

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© Mark Wade, 1997 - 2008 except where otherwise noted.