000196291 001__ 196291
000196291 003__ CZ-ZdVUG
000196291 005__ 20210629130036.0
000196291 041__ $$aeng
000196291 040__ $$aABC039$$bcze
000196291 1001_ $$aPálinkáš, Vojtech
000196291 24510 $$aEvaluation of comparisons of absolute gravimeters using correlated quantities: reprocessing and analyses of recent comparisons
000196291 300__ $$a23 stran
000196291 5203_ $$9eng$$aDue 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.
000196291 655_4 $$ačlánek v časopise
000196291 7001_ $$aVaľko, Miloš
000196291 7730_ $$92021$$dSpolková republika Německo, 2021.$$g95. (2), 23 s.$$tJournal of Geodesy$$x0949-7714
000196291 8564_ $$uhttps://link.springer.com/article/10.1007/s00190-020-01435-y
000196291 85642 $$ahttps://www.isvavai.cz/riv?s=rozsirene-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F21%3AN0000003%21RIV21-MSM-00025615
000196291 910__ $$aABC039
000196291 980__ $$aclanky_vugtk
000196291 985__ $$apalinkas
000196291 985__ $$ariv
000196291 985__ $$autvar24
000196291 985__ $$avalko