The GSC 100 Satellite Communicator with GPS

Frank van Diggelen and Brad Shermrd

Abstract:	This paper presents the world’s first hand-held Global Satellite Communicator, the GSC 100. This product provides worldwide, two way, text messaging capability, using the ORBCOMM system of LEO (Low Earth Orbit) satellites. The whole system tiom satellites to hand-held communicator, is tightly integrated with GPS. On-board GPS receivem in the satellites are used to provide LEO ephemeris data so the GSC 100 knows which ORBCOMM satellites are in view. The GSC 100 also has an integrated GPS reeeiver. With the GSC 100, users ean send and reeeive GlobalGramsm to and from any Internet email addms or other ORBCOMM cmnnmnieator anywhe~ in the world. To send a message, the user types the text on the GSC 100, keys in the desdnadon emad address and transmits the message. On a standard narrow-band VHF radio frequency, the user’s message goes up to the nearest of the ORBCOMM satellites and down to a Gateway Earth Station. From the gateway the message is routed to the desired email destinations, or transmitted to another GSC 100 or other ORBCOMM reeeiver. In this paper we will first deseribe the ORBCOMM systenL and then we will present the GSC 100.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	643 - 648
Cite this article:	van Diggelen, Frank, Shermrd, Brad, "The GSC 100 Satellite Communicator with GPS," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 643-648.
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