Testing Motorola Oncore GPS Receiver and Temperature-Stabilized Antennas for Time Metrology

Abstract

With GPS now fully operational, the market for GPS navigation receivers is booming and one can purchase a multichannel GPS pocket-sized receiver for only a few hundred dollars. One of them, the Motorola Oncore eight-channel one-frequency receiver, is of special interest for timing because it provides a 1 pps output. Preliminary results of tests with the BIPM International GPS common-view schedule are given in this paper. One identified source of instability in GPS time receiver hardware is a dependence on external temperature. This is typically of about 0.2 ns/deg C and can approach 2 ns/deg C for some types of receivers. In this paper it is shown that this problem can be resolved by enclosing antennas in temperature-stabilized ovens. Results are reported for Motorola and TTR6 Allen Osborne antennas.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1996
Accession Number
ADA511746

Entities

People

  • Florian Meyer
  • M. Vincent
  • P. Guerin
  • P. Moussay
  • Wlodzimierz Lewandowski

Organizations

  • International Bureau of Weights and Measures

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Clocks
  • Cosmic Rays
  • Frequency
  • Information Operations
  • Intervals
  • Measurement
  • Measuring Instruments
  • Metrology
  • Numbers
  • Observation
  • Observatories
  • Square Roots
  • Standards
  • Time Intervals

Readers

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

Technology Areas

  • Space