Common-View GPS Time Transfer Accuracy and Stability Results

Abstract

This paper presents the results of time and frequency dissemination research at Interstate Electronics that achieves 10-nanosecond timing accuracy and stability of parts in 10(14) over continental baselines. Global Positioning System (GPS) receiver data is processed by a differential, common--view technique that cancels most of the cardinal errors. We characterize the noise in the GPS data by using multicorner--hat separation-of-variances techniques. These noise values set Kalman smoother parameters for removal of random noise in the common-view data. The dissagreement between various satellite measurements provides a measure of common-view GPS accuracy. We present a summary of the analytical concepts, followed by the results of real-world data processing in common-view tests between Interstate/Anaheim and the United States Naval Observatory (USNO). The results of side-by-side GPS receiver testing, using the algorithms described here, provide measurements of GPS receiver stability, which can reach levels of 1 nanosecond per sidereal day.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1989
Accession Number
ADA509349

Entities

People

  • James R. Semler

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Artificial Satellites
  • Clocks
  • Data Processing
  • Filters
  • Frequency
  • Frequency Standards
  • Global Positioning Systems
  • Maximum Likelihood Estimation
  • Measurement
  • Nanosecond Time
  • Navigation
  • Range Finding
  • Standards
  • Time Intervals
  • United States

Readers

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

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems
  • Space