Sirius W

Sirius W
Localização orbital 5° E
Lançamento 27 de agosto de 1989 (35 anos)
Veículo Delta-4925
Operador Reino UnidoBritish Satellite Broadcasting
SuéciaNordiska Satellitaktiebolaget
Vida útil 10 anos
Fabricante Hughes
Cobertura Europa
Órbita Geoestacionária
Peso ? kg
Designação COSPAR 1989-067A

O Sirius W (anteriormente conhecido por BSB-R1, Marco Polo 1 e Sirius 1) foi um satélite de comunicação geoestacionário que foi construído pela Hughes, na maior parte de sua vida útil ele esteve localizado na posição orbital de 5 graus de longitude oeste em órbita inclinada e foi operado inicialmente pela British Satellite Broadcasting Ltd. (BSB) e posteriormente pela Nordiska Satellitaktiebolaget. O satélite foi baseado na plataforma HS 376 e sua expectativa de vida útil era de 10 anos.[1] O mesmo foi desligado e movido para a órbita cemitério em maio de 2003.[2]

História

Em julho de 1987 British Satellite Broadcasting Ltd. (BSB), empresa de propriedade privada, selecionou a Hughes Space and Communications Company, hoje conhecida como Boeing Satellite Systems Inc., para projetar e construir dois satélites Hughes HS 376 para a primeira televisão transmitida em DBS, no Reino Unido. A Hughes também construiu a telemetria e equipamentos de monitoramento para a estação de terra localizada em Southampton, e treinou engenheiros para operar a estações terrestres de BSB. Além disso, a Hughes concordou em comprar e lidar com todos os aspectos do lançamento e seguro e para entregar os satélites só depois de terem sido exaustivamente testados em órbita. Em um acordo que inaugurou a indústria de lançamento comercial nos Estados Unidos, a Hughes contratatou a McDonnell Douglas para fornecer dois foguetes Delta. O Delta-4925 que impulsionou o primeiro satélite de BSB, denominado Marcopolo 1, em 27 de agosto de 1989, e um Delta-6925 lançou o Marcopolo 2 em agosto de 1990.[1]

O mesmo foi vendido em dezembro de 1993 para a Nordiska Satellitaktiebolaget da Suécia e foi operou até 2000, como Sirius 1 a 5 graus oeste. Foi então transferido para 13 graus oeste, e renomeado para Sirius W, de onde foi operado em uma órbita inclinada. O mesmo foi desativado e enviado para a órbita cemitério em maio de 2003.[2]

Lançamento

O satélite foi lançado com sucesso ao espaço no dia 27 de agosto de 1989, por meio de um veiculo Delta-4925, lançado a partir da Estação da Força Aérea de Cabo Canaveral, na Flórida, EUA.[1]

Capacidade e cobertura

O Sirius W era equipado com 5 transponders em banda Ku para fornecer transmissões de telecomunicações para a Europa.[1]

Veja também

Referências

  1. ↑ a b c d «Marco Polo 1, 2 (BSB 1, 2) - Sirius 1 - Thor 1» (em inglês). Gunter's Space Page. Consultado em 30 de janeiro de 2014 
  2. ↑ a b «BSB (Marco Polo) 1 & 2 31W» (em inglês). Satellite & Digital TV Support forum. Consultado em 30 de janeiro de 2014 

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