METHOD OF CORRECTION OF I ANGLE IN THREE GEODETIC LEVELS SIMULTANEOUSLY Russian patent published in 1999 - IPC

FIELD: geodesy. SUBSTANCE: scale is anchored on lens of each geodetic level for correction of I angle of geodetic levels. Readings are taken from scales and images of ends of bulb of cylindrical level are matched with the use of vertical adjustment screws. Three geodetic levels located in the form of equilateral triangle are tested at same time. Value of difference of horizons for three pairs of geodetic levels is computed by readings from scales of opposite geodetic levels. Each geodetic level is aimed at scale of another geodetic level till images of ends of bulb of cylindrical level match with the use of adjustment screws and elevation screw sets reading equal to value of difference of horizons of this pair of geodetic levels. EFFECT: increased precision and economic efficiency. 2 dwg