Three Approximate Methods for Estimating the Best Subset of GPS satellites for Satellite Position Calculations

Abstract

Three methods approximating the best subset of four or five of N observable GPS satellites to be used for calculating spatial positions are evaluated. Position Dilution of Precision (PDOP) is used as the measure of effectiveness. Three GPS constellations are considered. The user spatial positions are taken from circular orbits ranging from 100 to 2400 nautical miles above the earth and from orbital inclinations ranging from 0 degrees to 90 degrees in 15 degree increments. Keywords: Position finding estimates; Mapping/ Computer programs; Approximation mathematics; Spatial position accuracy; Global positioning system.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1990
Accession Number
ADA220380

Entities

People

  • Michael A. Crombie

Organizations

  • Geospatial Research Laboratory

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Artificial Satellites
  • Circular Orbits
  • Computer Programs
  • Computers
  • Engineers
  • Global Positioning Systems
  • Mathematics
  • Navigation
  • Navigational Equipment
  • Numbers
  • Orbits
  • Position Finding
  • Satellite Constellations
  • Satellite Orbits
  • Square Roots
  • Virginia

Readers

  • Approximation Theory.
  • Positioning, Navigation, and Timing (PNT) Technology.
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Orbital Debris