EFFECT OF HORIZONTAL THERMAL GRADIENT ON GEODETIC MEASUREMENTS - MEASUREMENT AROUND THE BLAST FURNACE

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

EFFECT OF HORIZONTAL THERMAL GRADIENT ON GEODETIC MEASUREMENTS - MEASUREMENT AROUND THE BLAST FURNACE

Popis výsledku v původním jazyce

This paper deals with the issue of the influence of the horizontal temperature gradient (horizontal refraction) on geodetic measurements of the horizontal direction. The topic of horizontal refraction has not yet been given much attention in research, especially because it is significantly less than the effect of vertical refraction in common geodetic practice. The article presents the mathematical modelling process by solving the differential equation of wave propagation in non-homogeneous atmosphere. On this basis, a specific case where this effect is significant, a measurement near a strong cylindrical heat source (such as a blast furnace) is then solved. Simulation of the passage of the beam curved by the inhomogeneous environment was performed and the resulting transverse deviation was evaluated in relation to the source temperature and the distance between the position and the target mark. In the simulation, the furnace temperature was used in the range from 400 ° C to 1000 ° C, distance from the target from 60 to 150 m. The result of the calculations is an estimate of the development of the resulting transverse deviation including a graphical representation of the overall shape of the curve. A special simulation was also carried out for a very close passage of the line of the sight to the heat source, only 0.1 m.

Název v anglickém jazyce

EFFECT OF HORIZONTAL THERMAL GRADIENT ON GEODETIC MEASUREMENTS - MEASUREMENT AROUND THE BLAST FURNACE

Popis výsledku anglicky

This paper deals with the issue of the influence of the horizontal temperature gradient (horizontal refraction) on geodetic measurements of the horizontal direction. The topic of horizontal refraction has not yet been given much attention in research, especially because it is significantly less than the effect of vertical refraction in common geodetic practice. The article presents the mathematical modelling process by solving the differential equation of wave propagation in non-homogeneous atmosphere. On this basis, a specific case where this effect is significant, a measurement near a strong cylindrical heat source (such as a blast furnace) is then solved. Simulation of the passage of the beam curved by the inhomogeneous environment was performed and the resulting transverse deviation was evaluated in relation to the source temperature and the distance between the position and the target mark. In the simulation, the furnace temperature was used in the range from 400 ° C to 1000 ° C, distance from the target from 60 to 150 m. The result of the calculations is an estimate of the development of the resulting transverse deviation including a graphical representation of the overall shape of the curve. A special simulation was also carried out for a very close passage of the line of the sight to the heat source, only 0.1 m.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10300 - Physical sciences

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

18th International Multidisciplinary Scientific Geoconference SGEM 2018 - Informatics, Geoinformatics and Remote Sensing

ISBN

978-619-7408-40-9

ISSN

1314-2704

e-ISSN

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Počet stran výsledku

6

Strana od-do

751-756

Název nakladatele

STEF92 Technology Ltd.

Místo vydání

Sofia

Místo konání akce

Albena

Datum konání akce

30. 6. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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