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The initial information for the development of high-degree models of the Earth's gravitational field (EGF) are the results of satellite and ground-based measurements. At the same time, satellite measurements carry information on the long-wave structure of the EGF. Information on the short-wave structure of the EGF can be obtained only on the basis of ground-based measurements. Having organized the determination of deflection of vertical (DOV) with a resolution of several kilometers, the local structure of the EGF can be restored with the highest possible resolution. This can be done using digital zenith camera systems (DZCS). They are automated and allow to determine the components of the DOV at the point of placement in real time. The article presents the developed measurement technique with a DZCS and the results of its tests at various geographical points in the field. The proposed technique, unlike the existing traditional technique, allows to evaluate and take into account the calibration coefficients of the DZCS in each series of observations. In addition, the new proposed technique does not impose requirements on the accuracy of rotation of the telescope around the axis in the horizontal plane and the rigidity of the base of the DZCS. The test results of the new technique showed that the standard deviation of measurements is about 0.1″–0.3″.

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