Aiding GPS With Additional Satellite Navigation Services

Abstract

In modern warfare navigation services are very important. GPS is currently providing service for accurate navigation, except in some areas, especially urban areas, where GPS signals cannot always be tracked by users. In these cases some additional navigation support could be provided by other global navigation satellite systems. If GPS is combined with other navigation systems than the navigation gap will be minor. In this thesis, the effect of combining GPS with other satellite navigation systems, specifically GLONASS, Galileo and Compass, is evaluated in terms of availability and position dilution of precision (PDOP) values. First, satellite constellations are simulated in Satellite Tool Kit (STK) to generate ephemeris data. A street scenario is then established for simulating different elevation mask angles to represent urban and mountainous areas. The performance of the combined system is also evaluated as a function of the uncertainty in the time offset between systems.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2010
Accession Number
ADA517266

Entities

People

  • Yasin A. Mutlu

Organizations

  • Air Force Institute of Technology

Tags

DTIC Thesaurus Topics

  • Air Force
  • Artificial Satellites
  • Code Division Multiple Access
  • Frequency Division Multiple Access
  • Geosynchronous Orbits
  • Geosynchronous Satellites
  • Global Navigation Satellite Systems
  • Global Positioning Systems
  • Governments
  • Multiple Access
  • Navigation
  • Navigation Satellites
  • Satellite Constellations
  • Satellite Navigation Systems
  • Three Dimensional
  • Unmanned Aerial Vehicles
  • World Geodetic System

Readers

  • Computational Modeling and Simulation
  • Computer Vision.
  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Space
  • Space - Satellites