REFSAT/GPS breadboard : Test terminal hardware design report
- Published
- Nov 1, 1980.
- Physical Description
- 1 electronic document
Online Version
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- Restrictions on Access
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access - Summary
- All users of the NAVSTAR Global Positioning System (GPS) located within a rather large geographical area are currently required to perform a number of identical, common operations in order to accomplish a navigation "fix" (additional "location dependent" operations are also required). Under the REFSAT concept, the common operations are performed at a central location and results broadcast via a geostationary reference satellite (REFSAT). This concept allows a considerable reduction in the cost and complexity of individual civil user terminals. The hardware design of a REFSAT/GPS receiver terminal and the REFSAT transmitter simulator is described. Since six of the Phase 1 NAVSTAR GPS satellites are now operational a demonstration test plan utilizing the one-to-two hour per day viewing window is also described. Equipment check-out preliminary test results are presented.
- Other Subject(s)
- Collection
- NASA Technical Reports Server (NTRS) Collection.
- Note
- Document ID: 19810019776.
Accession ID: 81N28314.
NASA-CR-166697. - Terms of Use and Reproduction
- No Copyright.
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