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- Allan_variance abstract "The Allan variance (AVAR), also known as two-sample variance, is a measure of frequency stability in clocks, oscillators and amplifiers. It is named after David W. Allan. It is expressed mathematically asThe Allan deviation (ADEV) is the square root of Allan variance. It is also known as sigma-tau, and is expressed mathematically asThe M-sample variance is a measure of frequency stability using M samples, time T between measures and observation time . M-sample variance is expressed asThe Allan variance is intended to estimate stability due to noise processes and not that of systematic errors or imperfections such as frequency drift or temperature effects. The Allan variance and Allan deviation describe frequency stability, i.e. the stability in frequency. See also the section entitled "Interpretation of value" below.There are also different adaptations or alterations of Allan variance, notably the modified Allan variance MAVAR or MVAR, the total variance, and the Hadamard variance. There also exist time stability variants such as time deviation TDEV or time variance TVAR. Allan variance and its variants have proven useful outside the scope of timekeeping and are a set of improved statistical tools to use whenever the noise processes are not unconditionally stable, thus a derivative exists.The general M-sample variance remains important since it allows dead time in measurements and bias functions allows conversion into Allan variance values. Nevertheless, for most applications the special case of 2-sample, or "Allan variance" with is of greatest interest.".
- Allan_variance wikiPageExternalLink index.html.
- Allan_variance wikiPageExternalLink public.htm.
- Allan_variance wikiPageExternalLink noiseinfo.html.
- Allan_variance wikiPageExternalLink rubiola.org.
- Allan_variance wikiPageExternalLink www.alamath.com.
- Allan_variance wikiPageExternalLink www.allanstime.com.
- Allan_variance wikiPageExternalLink AllanVariance.
- Allan_variance wikiPageExternalLink Conversion_from_Allan_variance_to_Spectral_Densities.pdf.
- Allan_variance wikiPageExternalLink teaching.asp.
- Allan_variance wikiPageExternalLink publications.htm.
- Allan_variance wikiPageExternalLink www.wriley.com.
- Allan_variance wikiPageID "40708".
- Allan_variance wikiPageRevisionID "592866528".
- Allan_variance hasPhotoCollection Allan_variance.
- Allan_variance subject Category:Clocks.
- Allan_variance subject Category:Measurement.
- Allan_variance subject Category:Signal_processing_metrics.
- Allan_variance type Artifact100021939.
- Allan_variance type Clock103046257.
- Allan_variance type Clocks.
- Allan_variance type Device103183080.
- Allan_variance type Instrument103574816.
- Allan_variance type Instrumentality103575240.
- Allan_variance type MeasuringInstrument103733925.
- Allan_variance type Object100002684.
- Allan_variance type PhysicalEntity100001930.
- Allan_variance type Timepiece104437953.
- Allan_variance type Whole100003553.
- Allan_variance comment "The Allan variance (AVAR), also known as two-sample variance, is a measure of frequency stability in clocks, oscillators and amplifiers. It is named after David W. Allan. It is expressed mathematically asThe Allan deviation (ADEV) is the square root of Allan variance. It is also known as sigma-tau, and is expressed mathematically asThe M-sample variance is a measure of frequency stability using M samples, time T between measures and observation time .".
- Allan_variance label "Allan variance".
- Allan_variance label "Allan-Varianz".
- Allan_variance label "Variance d'Allan".
- Allan_variance label "Дисперсия Аллана".
- Allan_variance sameAs Allan-Varianz.
- Allan_variance sameAs Variance_d'Allan.
- Allan_variance sameAs m.0b4j2.
- Allan_variance sameAs Q1440227.
- Allan_variance sameAs Q1440227.
- Allan_variance sameAs Allan_variance.
- Allan_variance wasDerivedFrom Allan_variance?oldid=592866528.
- Allan_variance homepage www.allanstime.com.
- Allan_variance isPrimaryTopicOf Allan_variance.