INVESTIGATION OF THE REFRACTION INFLUENCE ON LEVELLING RESULTS RECEIVED WITH A DIGITAL LEVEL AT NEGATIVE TEMPERATURES
The article is devoted to the vertical refraction influence investigations on hig-precision levelling carried out with a digital level. In the process of observation for buildings and structures settlements, it is necessary to carry out high-precision levelling at negative temperatures. Levelling results received in such conditions are greatly distorted by vertical refraction. It is established, the refraction nature on leveling results with optical and digital levels is practically analogous, but the degree of this influence for the digital ones is much less.