Sounding Vessel Position from Adjustment by Variation of Parameters

Abstract

For hydrographic surveys conducted by the Naval Oceanographic Office, the position of the sounding vessel is determined by applying the method of adjustment by variation of parameters. Three types of navigational aids are used: ranging (ARGO, RAYDIST, LORAN C), azimuthal (Coast Artillary Azimuth Instrument), and hyperbolic (ARGO, DECCA, HI FIX6, LORAN C). Given data from any combination of at least two navigational aids, a fix may be obtained using an iterative method, which applies successive adjustments to an approximate location and forces it to converge to the most probable position. The magnitude and direction of each adjustment is determined from a least squares solution that minimizes the residual differences between actual navigational observations and imaginary observations calculated as if the ship were at the approximate location. Keywords: Coastal survey; Navigation; Least squares; Adjustment.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1985
Accession Number
ADA169140

Entities

People

  • George Mapp
  • H. J. Byrnes
  • Morris Heinzen

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Classification
  • Computer Programs
  • Identities
  • Latitude
  • Longitude
  • Loran
  • Measurement
  • Mississippi
  • Navigation
  • Navigational Aids
  • New York
  • Precision
  • Residuals
  • Security
  • Transmitters
  • Transponders

Readers

  • Approximation Theory.
  • Geodesy
  • Positioning, Navigation, and Timing (PNT) Technology.