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IRIDIUM sistema

IRIDIUM  pirmoji sistema su 66 palydovais skriejančiais žema žemės orbita LEO (Low earth orbit). Jinai pritaikyta bevielių telefonų tinklui. Tik 780 km. aukštyje šie satelitai dirba skirtingai abipusiu ryšiu.

(With 66 satellites forming a cross-linked grid above the Earth, the Iridium system is the first low-Earth-orbiting system for wireless telephone service. Only 780 km (485 miles) high, these satellites work differently from those at a much higher orbit (36,000 km) in two major ways. First, they’re close enough to receive the signals of a handheld device; and second, they act like cellular towers in the sky - where wireless signals can move overhead instead of through ground-based cells).

RIDIM aeronautikos servisas aprūpins pagrindinius balso, fakso ir duomenų perdavimo kelioninius, prekybinius, biznio, ir kitus lėktuvus. Mažas, lengvo svorio Iridium produktas yra suplanuotas papildyti esančias aeronautikos komunikacijas.

(Iridium aeronautical services will provide essential voice, facsimile, and data services to travelers on commercial, business, and general-aviation aircraft. Compact, lightweight Iridium units are designed to complement the existing aeronautical communications, offering passengers and crew convenient global access to telecommunications).

Pirmaeiliai skambučiai atliekami IRIDIUM tinkle su Iridium  mobiliais  telefonais. Jie leidžia dirbti su keliais tinklais. Dabar egzistuojančiu antžeminiu tinklu ir satelitiniu.

(The Iridium phone is the primary means by which callers will communicate directly through the Iridium network. Its multi-mode capability allows the telephone to work as a typical cellular telephone (in areas where compatible cellular service exists) and as a satellite telephone. For Iridium subscribers, this means one handheld phone providing both cellular and satellite access).

Sistemos kontrolės servisas yra pagrindinė priežiūros dalis Iridium sistemoje. Pagrindinis Satelitų kontrolės ir tinklo priežiūros centras yra šiaurės Virdžinijos valstijoje JAV. Kiti trys centrai (TTACs) yra Havajuose ir Kanadoje.

(System Control serves as the central management component for the Iridium system. It performs satellite control and network management in conjunction with the Iridium Satellite and Network Operations Center in northern Virginia, USA. In addition, three Telemetry, Tracking, and Control Centers (TTACs) located in Hawaii and Canada, are linked directly with the Satellite and Network Operations Center. Among its many functions, the TTAC facilities communicate with the satellite network to regulate the positioning of satellites during launch placement and subsequent orbit).

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Astronomija IRIDIUM sistema
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