GEODETIC CLASS GPS RECEIVER AS A STANDARD FOR TIME-CRITICAL APPLICATIONS

Vukan Ogrizovic, Jadranka Marendic, Snežana Renovica, Siniša Delcev, Jelena Gucevic

Abstract

GPS receivers are often used in time-keeping applications, due to their availability, low price and high accuracy. We made a research in order to test the capability of the GPS receiver to deliver a time-keeping accuracy needed for the time-critical applications, such as astrometry measurements, when a microsecond or even better level of accuracy is needed in real-time. We tested a geodetic class GPS receiver against a rubidium standard, over a 24 hours period. In the overall view, we obtained the accuracy that corresponds to the nominal values. However, we experienced outliers with the certain regularity that we could not explain with cycle-slips or the experiment set-up. Therefore, we are suggesting a longer experiment, to include other possible reasons for those outliers.

Keywords

GPS, PPS, time-keeping, Allan variance

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IMEKO-WC-2012-TC4-O19.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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