GPS Common - View Time Transfer,

Abstract

The introduction of the GPS common-view method at the beginning of the 1980s led to an immediate and dramatic improvement of international time comparisons. Since then further progress brought the precision and accuracy of GPS common-view intercontinental time transfer, from tens of nanoseconds to a few nanoseconds, even with SA activated. This achievement was made possible, mainly by the use of ultra-precise ground antenna coordinates, post-processed precise ephemerides, double-frequency measurements of ionosphere, and appropriate international coordination and standardization. This paper reviews developments and applications of the GPS common-view method during the last decade and comments on possible future improvements, whose objective is to attain sub-nanosecond uncertainty.

Document Details

Document Type
Technical Report
Publication Date
Dec 02, 1993
Accession Number
ADP009102

Entities

People

  • W. Lewandowski

Organizations

  • National Aeronautics and Space Administration

Tags

DTIC Thesaurus Topics

  • Accuracy
  • California
  • Ephemerides
  • Frequency
  • Intervals
  • Ionosphere
  • Measurement
  • Nanosecond Time
  • Precision
  • Standardization
  • Time
  • Time Intervals
  • Uncertainty

Readers

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

Technology Areas

  • Space