METHOD FOR MEASURING VERTICAL DEFLECTION AND APPARATUS FOR IMPLEMENTATION THEREOF Russian patent published in 2021 - IPC G01C9/00 

FIELD: astronomy.

SUBSTANCE: invention relates to the field of astronomical geodesy, particularly, to the field of measuring vertical deflections (VDs) using zenith telescopes. The invention is based on the possibility of determining the components of the VD by the components of the normalised gravity vector. During measurement of the positions of the stars in the frame of the zenith telescope, the construction axis of the tube thereof is deflected at least twice relative to the normal to the surface of a geoid by a known angle, and the tube of the telescope is rotated in azimuth around a vertical construction axis and fixed in at least 10 positions until complete rotation is complete. During the measurements, calibration coefficients determining the accuracy of measurements are automatically evaluated and accounted ("auto-calibrated"). This allows taking into account change thereof between series of measurements and provides a possibility to exclude the operation of calibration thereof by the night sky prior to beginning the measurements at each point. The accuracy and productivity of measurements therein is increased and the requirements for ensuring position stability of the horizontal ground base whereon the telescope is placed during measurements are reduced. This provides a possibility of wide application of the inventions in the field.

EFFECT: more accurate and productive measurement of the vertical deflection.

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