LORAN-C Data Reduction at the U.S. Naval Observatory

Abstract

As part of its mission and in cooperation with the U.S. Coast Guard, the U.S. Naval Observatory (USNO) monitors and reports the timing of the LORAN-C chains. The procedures for monitoring and processing the reported values have evolved with advances in monitoring equipment, computer interfaces and PCs. This paper discusses the current standardized procedures used by USNO to sort the raw data according to GRI rute; to fit and smooth the data points; and, for chains remotely monitored, to tie the values to the USNO Master Clock. The results of these procedures are the LORAN time of transmission values, us referenced to UTC(USN0) for all LORAN chains. This information is available to users via USNO publications and the USNO Automated Data Service (ADS).

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1991
Accession Number
ADA520677

Entities

People

  • Harold Chadsey

Organizations

  • United States Naval Observatory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Acquisition
  • Barometric Pressure
  • Clocks
  • Coast Guard
  • Computers
  • Data Acquisition
  • Data Analysis
  • Data Processing
  • Data Reduction
  • Data Transmission
  • Loran
  • Monitoring
  • North Carolina
  • Observatories
  • Processing Equipment
  • Time Intervals
  • United States

Readers

  • Approximation Theory.
  • Positioning, Navigation, and Timing (PNT) Technology.
  • Systems Analysis and Design