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ORBCOMM: Initial operations
- Source :
- Proceedings of the Fourth International Mobile Satellite Conference (IMSC 1995).
- Publication Year :
- 1995
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1995.
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Abstract
- ORBCOMM, a subsidiary of Orbital Sciences Corporation (OSC), has designed a system to provide low-cost mobile two-way data communications for worldwide commercial markets. The primary application areas are data communications and messaging. The ORBCOMM System has been designed so a user can compose, transmit, and receive messages; control and monitor assets; and collect data on hand-held subscriber communicators (SC's). With a constellation of 36 LEO satellites and terrestrial facilities, users in the temperature climate zones around the world will have a satellite in view over 98% of the time, and will have to wait less than two minutes the rest of the time to directly access a satellite. A message transmitted from a SC and received by the satellite is relayed down to a regional gateway earth station (GES). The GES then transmits the message via fiber land-lines to the network control center (NCC). The NCC then determines the location of the recipient of the message and routes the message accordingly. The NCC can receive and transmit messages from terrestrial networks via X.400 and X.25 gateways. The NCC can translate messages from widely used e-mail systems such as Internet, cc:Mail, and Microsoft Mail into X.400 messages for transmission to and from ORBCOMM SC's.
- Subjects :
- Communications And Radar
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Journal :
- Proceedings of the Fourth International Mobile Satellite Conference (IMSC 1995)
- Publication Type :
- Report
- Accession number :
- edsnas.19960022519
- Document Type :
- Report