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Evaluation of comparisons of absolute gravimeters using correlated quantities: reprocessing and analyses of recent comparisons

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F21%3AN0000082" target="_blank" >RIV/00177016:_____/21:N0000082 - isvavai.cz</a>

  • Alternative codes found

    RIV/00177016:_____/21:N0000002 RIV/00025615:_____/21:N0000003

  • Result on the web

    <a href="https://link.springer.com/article/10.1007/s00190-020-01435-y" target="_blank" >https://link.springer.com/article/10.1007/s00190-020-01435-y</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1007/s00190-020-01435-y" target="_blank" >10.1007/s00190-020-01435-y</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Evaluation of comparisons of absolute gravimeters using correlated quantities: reprocessing and analyses of recent comparisons

  • Original language description

    Due to the lack of a natural reference for the absolute acceleration of free-fall and gravity, absolute gravimeters are compared at international comparisons, where the gravity reference is realized based on a set of precise absolute measurements and the functional model for their processing. The main estimates of comparisons, specifically, the reference values, deviations of gravimeters (biases) and associated uncertainty estimates are obtained by the method of constrained least squares. In this paper, based on data from 6 comparisons, we demonstrate and discuss the importance of several aspects that significantly influence the estimated parameters, such as the type of the constraint, the weighting schemes, the correlations between measurements or outlier detection. Following the state-of-the-art key comparisons in metrology, we are applying correlations between measurements of a particular gravimeter for the first time, showing the ability to obtain appropriate uncertainty estimates, strictly applying the law of error propagation. The processing of comparisons by the method of least squares is described step-by-step to provide a background for analyses of absolute gravimeter comparisons in the future, reflecting all specifics of these comparisons. Estimated parameters from uniformly elaborated comparisons represent an interesting statistical data set that has been used to analyse the significance of differences between FG5, FG5X and other types of gravimeters. We believe that the described method of processing, as well as the published results, will be especially useful in the realization of the International Gravity Reference System.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10505 - Geology

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of geodesy

  • ISSN

    0949-7714

  • e-ISSN

  • Volume of the periodical

    95

  • Issue of the periodical within the volume

    leden

  • Country of publishing house

    DE - GERMANY

  • Number of pages

    23

  • Pages from-to

    21

  • UT code for WoS article

    000616394800004

  • EID of the result in the Scopus database

    2-s2.0-85100205446