Automatic Omega Station and LOP (Line of Position) Selection,

Abstract

Omega is a worldwide navigation system based on 8 VLF transmitting stations dispersed widely around the globe. The phase difference between the signals of any two Omega stations can provide a line of position (LOP) on the earth's surface. Two such LOPs intersect to provide a position fix. Generally several LOPs are selected to improve the accuracy and reliability of the fix either by using a least squares technique or as in MINS (Marine Integrated Navigation System) a more sophisticated Kalman filter technique. The resulting position accuracy and reliability depends on many factors such as geometry and signal strength. This report describes these factors and a set of algorithms used by MINS to automatically select a best choice of 5 Omega stations and 4 LOPs. This includes a modal interference predictor and a multi-LOP geometric dilution of precision calculation. Keywords: Omega navigation; Position finding; Automatic; GDOP(Geometric Dilution of Precision); Canada.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1987
Accession Number
ADA193302

Entities

People

  • J. C. Mcmillan

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Computer Programming
  • Computer Programs
  • Computers
  • Dilution
  • Filters
  • Geometry
  • Kalman Filters
  • Latitude
  • Loran
  • Navigation
  • Near Field
  • Operating Systems
  • Precision
  • Reliability
  • Transmitting

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.
  • Psychometric Testing or Psychological Assessment.