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Iridium 77
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Iridium 77 : ウィキペディア英語版
Iridium 77

Iridium 77 is a communications Satellite which is part of a satellite constellation known as Iridium, named after the 77th chemical element of the periodic table, ''iridium''. It was launched in 1998 and as of 2014, operational. It is owned and funded by Iridium, a communications company.
==Network==
Iridium 77 is a part of a space-based communications system called Iridium. Conceived, designed, and built by Motorola, the Iridium system provides wireless, mobile communications through a network of 66 satellites in polar, low-Earth orbits. Inaugurated in November 1998, under the auspices of Iridium LLC, this complex space system allowed callers using hand-held mobile phones and pagers to communicate anywhere in the world--a first in the history of telephony.

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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