FIELD: methods of determination of zenith and sight angles; may be used in petroleum geophysical for determination of well object paths. SUBSTANCE: method includes installation in body of three single-stage pendulum with angular-movement pickups; measurement of respective signals of these movements and selection of two values from three measured signals in discredited ranges of sight angle ϕ, pendulum rotation axes are oriented square to body longitudinal axis and measurement at an angle of 120 deg to one another in projections on aspidal plane is carried out of angle of deviation of rotation axis of each pendulum i relative to axis OXi in plane OXiZi of base OXi Yi Zi associated with respective pendulum i, measured angle of deviation symbolizes the instrument errors. Zenith and sight angles are determined with consideration of angular movements and angles of deviation from respective mathematical expressions for each of three ranges of sight angle: 0-30, 150-210, 330-360; 30-90, 210-270; 90-150, 270-330 deg. EFFECT: higher accuracy in determination of zenith and sight angles due to taking into account of angular parameters characterizing the instrument errors. 1 dwg
