References of "Svitlov, Sergiy"
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See detailAccuracy assessment of the two-sample zero-crossing detection in a sinusoidal signal
Svitlov, Sergiy; Rothleitner, Christian UL; Wang, Lijun

in Metrologia (2012), 49(4), 413-424

The accuracy of a two-sample zero-crossing detection method is assessed by analytical uncertainty propagation and is verified in numerical simulations. Approximated expressions are given to evaluate ... [more ▼]

The accuracy of a two-sample zero-crossing detection method is assessed by analytical uncertainty propagation and is verified in numerical simulations. Approximated expressions are given to evaluate uncertainty components due to linear interpolation, quantization, white noise and time jitter. The combined standard uncertainty of a detected zero phase is expressed as a function of the signal frequency, power of external noise and parameters of the digitizer used. The evaluation of the uncertainty of the measurand, derived from several detected zero-crossings, is illustrated with applications in frequency, displacement and free-fall acceleration measurements. The reported results can be used for uncertainty analysis and parameter optimization of a measurement system or a procedure, involving processing of sinusoidal signals. [less ▲]

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See detailOn the evaluation of systematic effects in atom and corner-cube absolute gravimeters
Rothleitner, Christian UL; Svitlov, Sergiy

in Physics Letters A (2012), 376

We show that due to analogy of atom and optical interferometry a perturbed phase propagates identically in atom and corner-cube absolute gravimeters. To evaluate associated systematic effects, we consider ... [more ▼]

We show that due to analogy of atom and optical interferometry a perturbed phase propagates identically in atom and corner-cube absolute gravimeters. To evaluate associated systematic effects, we consider both gravimeters as a linear system in the time domain. This formalism is based on a weighting function earlier derived for a corner-cube gravimeter. As an example, we demonstrate that the corrections for a linear change of gravity are essentially the same for both gravimeters. Application of a common formalism to analyse various systematic effects could reveal possible source of disagreement in comparisons of atom and corner-cube absolute gravimeters. [less ▲]

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