Absolute Time Error Calibration of GPS Receivers Using Advanced GPS Simulators

Abstract

Precise time transfer experiments using GPS with time stability's under ten nanoseconds are commonly being reported within the time transfer community. Relative calibrations are done by measuring the time error of one GPS receiver versus a "known master reference receiver." This relative calibration can produce very stable results, but this begs the question of "how does one calibrate the master reference GPS receiver." In this paper we will discuss the use of advanced GPS simulators to measure the absolute time error of GPS receivers. This method has the advantage of calibrating a GPS receiver independent of any GPS system biases. The use of a GPS simulator also allows testing of special conditions of the GPS system, such as year 2000 rollover and the 1024 week epoch rollover.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1997
Accession Number
ADA511024

Entities

People

  • E. D. Powers
  • J. Brad
  • J. D. White
  • M. Miranian

Organizations

  • United States Naval Observatory

Tags

DTIC Thesaurus Topics

  • Anechoic Chambers
  • Artificial Satellites
  • Boundaries
  • Calibration
  • Errors
  • Frequency
  • Global Positioning Systems
  • Intervals
  • Measurement
  • Military Research
  • Nanosecond Time
  • Navigation
  • Simulations
  • Simulators
  • Standards
  • Time Intervals
  • United States

Readers

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

Technology Areas

  • Space