| 摘要 |
The invention relates to geodesic measurements, in particular to methods for determination of vertical refraction. Method for determination of vertical refraction is in fact that on uniform horizontal surface one installs level and rail as at leveling, in front of rail at same separation from it and from level one installs flat mirror reflector with possibility of its inclination in vertical plane with respect to straight vertical position, level is brought to image of rail in reflector, one periodically takes readings on level, with inclination of reflector till achieving constant reading of image of rail in level, and value of vertical refraction is determined by angle of deflection of reflector from straight position. The invention simplifies determination of vertical refraction by angle of inclination of flat mirror reflector. |
