Precise GPS Ephemerides from DMA and NGS Tested by Time Transfer

Abstract

It has already been shown that the use of DMA precise ephemerides brings a sign@cant improvement to the accuracy of GPS time transfer At present a new set of precise ephemerides produced by the NGS has been made available to the timing community. This study demonstrates that both types of precise ephemerides improve long distance GPS time transfer and remove the effects of SA degradation of broadcast ephemerides. The issue of overcoming SA is also discussed in terms of the routine availability of precise ephemerides.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1991
Accession Number
ADA515041

Entities

People

  • Christoph Thomas
  • G. Petit
  • Wlodzimierz Lewandowski

Organizations

  • International Bureau of Weights and Measures

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Artificial Satellites
  • Availability
  • California
  • Cartesian Coordinates
  • Clocks
  • Computations
  • Ephemerides
  • Geodetic Surveys
  • Global Positioning Systems
  • Measurement
  • Precision
  • Standards
  • Stations
  • United States
  • World Geodetic System

Readers

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

Technology Areas

  • Space
  • Space - Orbital Debris