Millimeter-Accuracy Satellite Navigation

Abstract

Millimeter-accuracy satellite navigation, defined as the determination of instantaneous position coordinates of a point on a moving platform (land/sea/air/space vehicle) with respect to a reference frame defined by points fixed on the ground, with millimeter-level uncertainties, is possible using the satellite radio interferometry techniques. These techniques include use of doubly-differenced, dual-band, reconstructed-carrier phase observations of the NAVSTAR GPS satellites simultaneously from the unknown point and from fixed reference points suitably arrayed on the ground so that the integer-cycle ambiguities of their observations can be resolved to reduce satellite orbit uncertainties. For instantaneous ambiguity resolution of the moving-platform observations, at least seven satellites must be observed simultaneously. If the available number of NAVSTAR satellites is insufficient, GLONASS satellites may be used. Other options for ambiguity resolution are also available.

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Document Details

Document Type
Technical Report
Publication Date
Apr 08, 1991
Accession Number
ADA237736

Entities

People

  • C. C. Counselman

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Air Force
  • Artificial Satellites
  • Classification
  • Global Positioning Systems
  • Massachusetts
  • Navigation
  • Observation
  • Platforms
  • Radio Interferometry
  • Radio Signals
  • Satellite Orbits
  • Security
  • Spacecraft
  • Uncertainty
  • Vehicles

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Space
  • Space - Satellites
  • Space - Space Objects