Application of Loran-C Positioning to Hydrographic Surveying

Abstract

The possible application of hyperbolic Loran-C as a positioning system for hydrographic surveys was investigated. It was found that the present capabilities of the system did not meet the 40 meter (drms) accuracy required for offshore surveys. The use of differential Loran-C techniques and geodetic calibration procedures was examined. A field test was conducted in Monterey, Bay California, using a microwave positioning system to test the accuracy of the West Coast Loran-C chain, specifically the 9940-W and Y rates. Overland propagation corrections for the test area are presented. It was found that scrupulous application of the differential technique and rigorous calibration procedures improved the absolute position accuracy of a mobile Loran-C receiver to something less than 100 meters (drms).

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1979
Accession Number
ADA078278

Entities

People

  • Kurt J. Schnebele

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Calibration
  • California
  • Communication Systems
  • Difference Equations
  • Equations
  • Frequency
  • Geographic Regions
  • Loran
  • Measurement
  • Medium Frequency
  • Navigation
  • Radio Navigation
  • Repetition Rate
  • Standards
  • Travel Time
  • United States

Readers

  • Coastal and Marine Engineering/Sediment Transport/Hydraulic Engineering
  • Positioning, Navigation, and Timing (PNT) Technology.
  • Systems Analysis and Design