Experimental study regarding astro-geodetic vertical deviations

The main goal of the present study consist in the evaluation of the vertical deviations obtained by visual astro-geodetic technique. Were performed five series of observations, both azimuthal and zenithal, in different nights by different observers. All angular measurements were visual effectuated with a high precision and motorized electronic total station and time measurements with a manual electronic chronometer. All observations was adjusted separately, first time in-block (azimuthal and zenithal measurements together) and second time only zenithal measurements. Finally, resulted vertical deviations components were inter-compared and also compared with similar values obtained by different methods and instruments. The study served mainly to check the variation of vertical deviations components and associate precision parameters at some measurements errors or modification of input data.