REFRACTION CORRECTION IN PRECISE LEVELING OBSERVATIONS FOR NATIONAL LEVELING NETWORK FIRST ORDER-Reference-Cited by-同舟云学术

REFRACTION CORRECTION IN PRECISE LEVELING OBSERVATIONS FOR NATIONAL LEVELING NETWORK FIRST ORDER

Published:2020-12-16 Issue:4 Volume:46 Page:159-162
ISSN:2029-6991
Container-title:Geodesy and cartography
language:
Short-container-title:

Author:

Dimitrov Nikolay¹^ORCID,Georgiev Ivan¹,Danchev Petar¹^ORCID

Affiliation:

1. National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences, Sofia, Bulgaria

Abstract

The paper deals with some problems when applying a correction to reduce the effect of vertical refraction in precise leveling observation. An example for calculating the refraction correction for one first order leveling line with length of 109 km in Bulgaria is given. Comparison between the obtained errors before and after applying refraction correction has been made. The results show that is important to measure the temperatures simultaneously with the leveling by aspiration thermometer with an accuracy of ±0.1 °C. It is recommended to make experimental research and to adopt appropriate for Bulgaria model for taking into account the influence of vertical refraction.

Publisher

Vilnius Gediminas Technical University

Subject

General Earth and Planetary Sciences

Reference8 articles.

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3. A model of temperature stratification for correction of levelling refraction;Holdahl, S. R.,1981

4. Measuring of the refraction in the second levelling of Finland;Hytonen, E.,1967

5. Formulas and tables for computation of leveling refraction;Kukkamäki, T. J.,1939

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