Analysis of accuracy of measurement by Doppler laser meters

Skeivalas, Jonas; Giniotis, Vytautas

doi:10.1117/1.1577579

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“…One of the disturbing factors is the Doppler effect, whereby the frequency of the signal received from the satellite is shifted by some value, which depends on the radial speed of the satellite. This shift of frequency can be written as [11]…”

Section: Theoretical Assumptionsmentioning

confidence: 99%

On the measurement of the neutrino velocity applying the standard time of the Global Positioning System

Skeivalas¹,

Paršeliūnas²

2012

Meas. Sci. Technol.

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The measurement of the neutrino velocity applying the standard time of the Global Positioning System (GPS) is presented in the paper. The practical data were taken from the OPERA experiment, in which neutrino emission from the CERN LHC accelerator to Gran Sasso detector was investigated. The distance between accelerator and detector is about 730 km. The time interval was measured by benchmark clocks, which were calibrated by the standard GPS time signals received from GPS satellites. The calculation of the accuracy of the GPS time signals with respect to changes of the signals' frequencies due to the Doppler effect is presented. It is shown that a maximum error of about 200 ns could occur when GPS time signals are applied for the calibration of the clocks for the neutrino velocity measurements.

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Section: Theoretical Assumptionsmentioning

confidence: 99%