The LONARS - Aided Doppler Solution - A New Method for Precise Positioning at Sea,

Abstract

LONARS is a precision position-fixing system based primarily on the use of LORAN-C Radio Navigation. This system is used to precisely position test platforms in a 2500 square mile ocean area off the Florida coast. To meet future stringent accuracy requirements, APL and DMA personnel undertook an at-sea calibration of LONARS during April 1980. The single pass Doppler solution using the Magnavox Geoceier and DMAHTC precise ephemeris was chosen as the calibration standard. The LONARS system was used to model ship's drift during each Doppler pass. Included in the paper is an analysis of significant error sources in the Doppler fix, the utility of shore-ship single pass translocation, and a summary of operational problems encountered during the at-sea calibration. The estimated accuracy of LONARS-Aided Doppler was found to be 10 meters one-sigma. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1982
Accession Number
ADA110552

Entities

People

  • Brett Merritt
  • Thomas Jerardi

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Artificial Satellites
  • Calibration
  • Computations
  • Computer Programs
  • Correlation Analysis
  • Data Acquisition
  • Data Analysis
  • Data Sets
  • Ephemerides
  • Grids
  • Hyperbolic Navigation
  • Loran
  • Navigation
  • Precision
  • Statistics

Readers

  • Maritime and Naval Warfare Studies
  • Positioning, Navigation, and Timing (PNT) Technology.