VERTICAL ADJUSTMENT OF THE INTERFEROMETER MEASURING BEAM IN A BALLISTIC GRAVIMETER
E. N. Kalish, F Stus'Yu., D. A. Nosov, I. S. Sizikov
Institute of Automation and Electrometry Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: абсолютное измерение силы тяжести, лазерный баллистический гравиметр, выставление вертикали, интерферометр, absolute gravity measurement, laser ballistic gravimeter, vertical alignment, interferometer
Abstract
A method of setting the vertical by monitoring the measuring beam flare displacement in absolute laser ballistic gravimeters is described. The method is based on video recording of the displacement trajectory of a measuring beam reflected from a corner reflector during free-fall of the body. The magnitude and angle of the measuring beam deflection from the vertical are determined by frame-by-frame processing of the captured video sequence. An experimental verification of the method has shown that the error in setting the vertical is less than 3 • 10-5 rad
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