| タイトル | The Globalstar mobile satellite system for worldwide personal communications |
| 本文（外部サイト） | http://hdl.handle.net/2060/19940018313 |
| 著者（英） | Viterbi, Andrew J.; Wiedeman, Robert A. |
| 著者所属（英） | Loral Aerospace Corp. |
| 発行日 | 1993-01-01 |
| 言語 | eng |
| 内容記述 | Loral Aerospace Corporation along with Qualcomm Inc. have developed a satellite system which offers global mobile voice and data services to and from handheld and mobile user terminals with omni-directional antennas. By combining the use of low-earth orbit (LEO) satellites with existing terrestrial communications systems and innovative, highly efficient spread spectrum techniques, the Globalstar system provides users with low-cost, reliable communications throughout the world. The Globalstar space segment consists of a constellation of 48 LEO satellites in circular orbits with 750 NM (1389 km) altitude. Each satellite communicates with the mobile users via the satellite-user links and with gateway stations. The gateway stations handle the interface between the Globalstar network and the OSTN/PLMN systems. Globalstar transceivers are similar to currently proposed digital cellular telephones in size and have a serial number that will allow the end user to make and receive calls from or to that device anywhere in the world. The Globalstar system is designed to operate as a complement to existing local, long-distance, public, private and specialized telecommunications networks. Service is primarily designed to serve the rural and thin route communications needs of consumers, government users, and private networks. |
| NASA分類 | COMMUNICATIONS AND RADAR |
| レポートNO | 94N22786 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/114515 |
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