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Thor (satellite)
Thor (previously known as Marcopolo) is a family of satellites designed, launched and tested by Hughes Space and Communications (now part of Boeing Satellite Systems) for British Satellite Broadcasting (BSB), and were used for Britain's Direct Broadcast Service. Thor is owned by Telenor.〔(BSB History by Boeing )〕 Marcopolo 1 launched on 27 August 1989 on the 187th launch of a Delta rocket, and Marcopolo 2 launched on 17 August 1990, on a Delta II rocket.〔(【引用サイトリンク】title=Boeing Launch Services Mission Record )〕 Marcopolo I had the Hughes designation HS376.〔() NASM's Herbert Stephen Desind Collection,p. 36〕
Although the satellites performed as designed, BSB〔(BSB1 )〕 merged with Sky Television to form British Sky Broadcasting and the BSB satellites were sold off and renamed. This also resulted in the obsoletion of the Squarial satellite-reception antenna, which was designed to operate with Thor 1 only.
==Marcopolo 1 (Sirius 1/Sirius W)==
Sirius W, originally Sirius 1, was launched on 27 August 1989. It was Hughes Space and Communications's first satellite. Marcopolo 1 was sold in December 1993 to Nordic Satellite AB of Sweden and operated until 2000 as Sirius 1 at 5°E. It was then moved to 13°W, and renamed Sirius W. It had 5 Ku band transponders.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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