Absolute Positioning by Collecting Global Positioning System (GPS) Data Along Short Baselines

Abstract

This report addresses the problem of determining absolute positions (longitude and latitude) from Global Positioning System (GPS) data in the presence of Selective Availability (SA). The SA-epsilon effect can be avoided if one can wait until corrected or post-fitted satellite ephemerides and clock estimates become available. However, the SA-dither effect cannot easily be eliminated from the ranging data in the field. This report considers both problems and suggests methods that have the potential to allow absolute position solutions to be obtained even with dither corrupting the satellite data. The requirements and practicality of each are reviewed. Selective availability (SA), Antispoofing (AS), Absolute positioning, Global positioning system (GPS).

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1993
Accession Number
ADA271324

Entities

People

  • Alan G. Evans
  • Bruce R. Hermann

Organizations

  • Naval Surface Warfare Center

Tags

DTIC Thesaurus Topics

  • Artificial Satellites
  • Availability
  • Coordinate Systems
  • Data Processing
  • Direction Finding
  • Ephemerides
  • Frequency
  • Frequency Standards
  • Geometry
  • Global Positioning Systems
  • Latitude
  • Longitude
  • Measurement
  • Observation
  • Range Finding
  • Space Systems
  • World Geodetic System

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.
  • Systems Analysis and Design

Technology Areas

  • Space