The Effects of Ambient Conditions of Cesium Clock Rates

Abstract

The rates and errors of 42 cesium clocks in 6 different vaults at USNO were studied using 18 months of hourly data. Temperature effects were found to be negligible when the temperature was controlled to within plus or minus 1 degree C. During excursions much greater than this, rate changes in either sense are possible. No short-term humidity effects were evident, but there appears to be an annual variation in clock rates (in either sense) dependent on absolute humidity. Significant intercorrelations between clocks indicate the general importance of environmental conditions of some kind.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA495523

Entities

People

  • Lee A. Breakiron

Organizations

  • United States Naval Observatory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Conditioning
  • Barometric Pressure
  • Climate Change
  • Clocks
  • Coefficients
  • Data Analysis
  • Frequency
  • Humidity
  • Measurement
  • Numbers
  • Pressure Measurement
  • Seasonal Variations
  • Square Roots
  • Standards
  • Temperature Coefficients
  • Temperature Gradients

Readers

  • Mathematics or Statistics
  • Positioning, Navigation, and Timing (PNT) Technology.