Common View Time Transfer Using Worldwide GPS and DMA Monitor Stations

Abstract

Analysis of the on-orbit Navstar clocks and of the GPS monitor station reference clocks is performed by the Naval Research Laboratory using both broadcast and postprocessed precise ephemerides. The paise ephemerides are produced by the Defense Mapping Agency (DMA) for each of the GPS space vehicles from pseudo-range measurements collected at five GPS and at five DMA monitor stations spaced around the world. Recently, DMA established an additional site co-located with the U.S. Naval Observatory precise-time site. The time reference for the new DMA site is the DoD Master Clock. Now, for the first time, it is possible to transfer time every 15 minutes via common view from the DoD Master Clock to the 11 CPS and DMA monitor stations.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1995
Accession Number
ADA502186

Entities

People

  • Hugh E. Warren
  • James A. Buisson
  • Orville J. Oaks
  • Thomas B. Mccaskill
  • Wilson G. Reid

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Artificial Satellites
  • Clocks
  • Databases
  • Ephemerides
  • Frequency
  • Frequency Standards
  • Global Positioning Systems
  • Low Noise
  • Measurement
  • Military Research
  • Navigation
  • Observatories
  • Precision
  • Spacecraft
  • Standards
  • Vehicles

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Space