Real-Time Time and Frequency Transfer Using GPS Carrier Phase Observations

Abstract

A client-server based data communication scheme was developed in order to establish a permanent and dynamic real-time GPS network for relative time and frequency transfer. The Kalman- filter-based real-time processor uses station pairwise common-view phase observations for estimating the receiver clock and tropospheric parameters. Orbit determination is based on real-time broadcast ephemerides and station coordinates are fixed and known. Real-time estimates were compared with clock solutions from postprocessed data resulting in standard deviation values in the order of 50 ps for short baselines.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2004
Accession Number
ADA427905

Entities

People

  • Carsten Rieck
  • Jan Johansson
  • Kenneth Jaldehag
  • Per Jarlemark

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Atomic Beam Masers
  • Clocks
  • Computer Networks
  • Data Transmission
  • Decoding
  • Digital Communications
  • Environment
  • Frequency
  • Kalman Filters
  • Measurement
  • Networks
  • Observation
  • Operating Systems
  • Random Walk
  • Standards
  • Time Intervals

Readers

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

Technology Areas

  • Space
  • Space - Orbital Debris