WAAS, EGNOS, and MSAS for Telecom Sync

Abstract

The WAAS, EGNOs, and MSAS GPS Augmentation Systems bridge the gap between the military applications of GPS and the needs of civil aviation navigation. These USA, Europe, and Asian systems consist of a network of differential GPS ground stations, using principally the Inmarsat-3 geosynchronous satellite constellation as the means of relaying the differential corrections to the users. In the process of providing precise navigation signals, GPS time is maintained through the Inmarsat-3 downlinks. It is this functionality that provides fist robust time retrieval for the synchronization needs of the telecommunications community. This paper discusses: 1) The basic makeup and performance of the system 2) How time and frequency can be extracted for the telecom terminals 3) Added functionality and noise rejection capabilities using these signals for telecom timing applications 4) How the system offers the first true backup to the GPN C/A signal for telecom synchronization users.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2000
Accession Number
ADA485380

Entities

People

  • Hugo Fruehauf

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Acquisition
  • Ambient Noise
  • Artificial Satellites
  • C Band
  • Civil Aviation
  • Frequency
  • Geosynchronous Orbits
  • Geosynchronous Satellites
  • Global Positioning Systems
  • Military Applications
  • Navigation
  • Satellite Constellations
  • Stations
  • Time Intervals
  • United States
  • Uplinks

Fields of Study

  • Computer science

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.
  • Radio communications and signal processing.

Technology Areas

  • Space
  • Space - Satellites