A new method for determining the orthometric height based on the measurement of the gravitational effect of time dilation

V.F. Fateev, E.A. Rybakov, V.P. Sysoev, A.I. Zharikov, F.R. Smirnov

Al’manac of Modern Metrology № 2 (7) 2016, pages 67–74

The paper presents the results of two ground-based experiments to determine the orthometric height difference between a stationary atomic clock and a transportable hydrogen atomic clock based on the measurement of the gravitational effect of their time scales dilation. The stability of the transportable atomic clock was 3∙10-15. The experiments included initial mutual synchronization of the two clocks, moving one of them to a ground point with a different orthometric height (a different gravitational potential) and measuring the time scales dilation at one-day intervals using synchronization with GLONASS/GPS receivers. The stationary clock was located at VNIIFTRI and the transportable clock was placed at two points: in Moscow (difference in height -100 m, distance 46 km) and in the Caucuses Mountains (difference in height +1804 m, distance1408 km). The measured gravitational effect in the first experiment was about -1ns, with a measurement error of 0.3 ns, and in the second experiment it reached +17ns with a measurement error of 0.8 ns. This corresponds to the errors in the determination of orthometric heights of 32 m and 85 m, respectively.

Full texts of articles are available only in Russian in printed issues of the magazine.