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The REFSAT approach to low-cost GPS terminalsA concept utilizing a geostationary reference satellite (REFSAT) that broadcasts navigation aiding signals to low cost civil user terminals which employ the constellation of 24 NAVSTAR Global Positioning System (GPS) satellites for position determination is described. The signal acquisition, tracking and position fixing properties of such low cost, dual channel, L-band, civil user receiver designed to receive both GPS navigation and REFSAT navigation aiding signals is presented. REFSAT reduces the cost of user equipment.
Document ID
19790019993
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Sennott, J. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Choudhury, A. K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Taylor, R. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
April 1, 1979
Subject Category
Aircraft Communications And Navigation
Report/Patent Number
NASA-TM-79655
Report Number: NASA-TM-79655
Accession Number
79N28164
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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