Geometric Performance of Pseudoranging Navigation Satellite Systems: A Computer Program.

Abstract

Describes a computer program designed to analyze many aspects of the geometric performance of pseudoranging navigation satellite (navsat) systems for users either on earth or in earth orbit. A navsat system includes a fleet of satellites, each with an accurate clock that transmits ephemeris, time, and other signals. These signal can be received by relatively small, inexpensive equipment, thus enabling the user to compute his position and time accurately. The NAVSTAR/Global Positioning System (GPS) is such a system, and its overall user accuracy can be broken down into two components which, when multiplied together, yield an estimate of the user's position and/or time accuracy. These two components are analyzed in this report; the first depends on the relative geometry among the navsats being employed and the user's location, and the second involves a determination of system errors.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1977
Accession Number
ADA043744

Entities

People

  • J. J. Mate
  • Jeannine V. Lamar
  • L. N. Rowell

Organizations

  • RAND Corporation

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Algorithms
  • Altitude
  • Artificial Satellites
  • Capillary Electrophoresis
  • Computations
  • Computer Programs
  • Coordinate Systems
  • Data Sets
  • Earth Orbits
  • Global Positioning Systems
  • Navigation
  • Navigation Satellites
  • Orbital Elements
  • Plastic Explosives
  • Three Dimensional

Fields of Study

  • Computer science

Readers

  • Computer Science.
  • Life Cycle Cost Analysis
  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Space
  • Space - Satellites