Study of astronomical and geodetic series using the Allan variance |
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| Authors: | Z M Malkin |
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| Institution: | 1.Pulkovo Observatory,Russian Academy of Sciences,St. Petersburg,Russia |
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| Abstract: | Recently, the Allan variance (AVAR), suggested more than 40 years ago to describe the instability of frequency standards,
has been used extensively to study various time series in astrometry, geodesy, and geodynamics. This method makes it possible
to effectively study the characteristics of the noise component of data, such as the change of location of stations, coordinates
of radio sources, etc. Moreover, AVAR may be used to study the spectral and fractal structure of this noise component. To
handle unequal and multivariate observations, which are characteristic of many astronomical and geodetic applications, the
author suggests appropriate AVAR modifications. A brief overview of classical and modified AVAR in astrometry and geodynamics
is given. |
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