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

Identifikátory výsledku

  • Kód výsledku v 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>

  • Nalezeny alternativní kódy

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

  • Výsledek na webu

    <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>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

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

  • Popis výsledku v původním jazyce

    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.

  • Název v anglickém jazyce

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

  • Popis výsledku anglicky

    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.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10505 - Geology

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2021

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    Journal of geodesy

  • ISSN

    0949-7714

  • e-ISSN

  • Svazek periodika

    95

  • Číslo periodika v rámci svazku

    leden

  • Stát vydavatele periodika

    DE - Spolková republika Německo

  • Počet stran výsledku

    23

  • Strana od-do

    21

  • Kód UT WoS článku

    000616394800004

  • EID výsledku v databázi Scopus

    2-s2.0-85100205446