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    Telstar

    Telstar 5
    Telstar 5
    A global network of communications satellites originally operated by AT&T Skynet, later Loral Skynet. Telstar 1 was the first commercial communications satellite; owned by AT&T and flown by NASA, it relayed the first transatlantic television transmissions between Andover, Maine, and stations in Goonhilly, England and Pleumeur-Bodou, France. Telstar 5, 6, and 7, serve the United States, southern Canada, Mexico, and the Caribbean. Telstar 5 and 6 each carry 24 C-band and 28 Ku-band transponders (see frequency bands, while Telstar 7 carries 24 C-band and 24 Ku-band transponders but achieves the same radio-frequency transmitter power, of 3200 W, by using more powerful components. In 2003, Loral announced an agreement to sell Telstar 5, 6 and 7 to Intelsat, which now operates the satellites now as Intelsat Americas 5, 6 and 7. Telstar 8, to be operated as Intelsat America 8, will be launched in 2004 from Sea Launch's Odyssey Launch Platform by a Zenit-3SL rocket. It is one of the most powerful communications satellites ever built, with a total of 92 Ku-band, C-band, and Ka-band transponders, a transmitter power of at least 16,000 W, and a mass of 5,500 kg. Telstar 8 wil replace Telstar 402R, which Loral declared lost in 2003, at 89° W and provide coverage across North and South America.


    Spacecraft Launch date Launch vehicle Launch site Orbit Mass (kg)
    Telstar 1 Jul. 10, 1962 Delta B Cape Canaveral 945 × 5,643 km × 45° 77
    Telstar 2 May 7, 1963 Delta B Cape Canaveral 972 × 10,802 km × 43° 79
    Telstar 3A / Arabsat 1E Jul. 28, 1983 Delta 3925 Cape Canaveral GSO at 76° W 625
    Telstar 3C Aug. 30, 1984 Shuttle STS-41 Cape Canaveral GSO at 125° W 625
    Telstar 3D Jun. 17, 1985 Shuttle STS-51 Cape Canaveral GSO at 76° W 630
    Telstar 401 Dec. 16, 1993 Atlas IIAS Cape Canaveral GSO at 97° W 3,375
    Telstar 402 Sep. 9, 1994 Ariane 421 Kourou lost in orbit 3,485
    Telstar 402R Sep. 24, 1995 Ariane 421 Kourou GSO at 89° W 3,410
    Telstar 5 May 24, 1997 Proton 2KDM4 Baikonur GSO at 97° W 3,600
    Telstar 6 Feb. 15, 1999 Proton 2KDM3 Baikonur GSO at 93° W 3,763
    Telstar 7 Sep. 25, 1999 Ariane 44LP Kourou GSO at 127° W 3,790
    Telstar 10 / APStar 2R Oct. 17, 1997 CZ-3B Xi Chang GSO at 76.5° E 3,700
    Telstar 11 / Orion 1 Nov. 29, 1994 Atlas IIA Cape Canaveral GSO at 37.5° W 2,361
    Telstar 12 / Orion 2 Oct. 19, 1999 Ariane 44LP Kourou GSO at 15° W 3,814
    Telstar 13 / Echostar 9 Aug. 8, 2003 Zenit 3SL Sea Launch GSO at 121° W 4,737
    Telstar 14 / Estrala do Sul 1 Jan. 11, 2004 Zenit 3SL Sea Launch GSO at 63° W 4,694
    Telstar 18 / APStar 5 Jun. 28, 2004 Zenit 3SL Sea Launch GSO at 138° E 4,640


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