Utjecaj ubrzanja sile teže na različite sustave visina

master's thesis

• Title (english): The impact of gravity acceleration on different height systems
• Author: Klara Svetinović
• Mentor: Marko Pavasović (mentor)
• Mentor: Tedi Banković (pomoć pri izradi, neposredni voditelj)
• Committee member: Ante Marendić (član povjerenstva)
• Committee member: Luka Rumora (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geodesy; (Institute of Geomatics); (Chair of State Surveying); Zagreb
• Defense date and country: 2024-09-20, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Geodesy

Abstract

Geometrijski nivelman predstavlja najprecizniju metodu određivanja visina u geodeziji. Metodom preciznog nivelmana moguće je s visokom točnošću izračunati visinske razlike od 1 mm na svakih kilometar duljine mjerenog vlaka. U idealnom slučaju, zatvorena nivelmanska figura bi trebala imati sumu visinskih razlika jednaku nuli, no utjecaj ubrzanja sile teže uzrokuje odstupanja od tog ideala. U svrhu analize ovog utjecaja, nivelmanski vlak je realiziran kroz mjerenje visinskih razlika korištenjem metode geometrijskog nivelmana i relativnih gravimetrijskih mjerenja. Postoji nekoliko sustava visina (geopotencijalne kote, dinamičke, ortometrijske i normalne visine) koji se razlikuju ovisno o odabiru referentne plohe (geoid, kvazi-geoid, elipsoid). Visinske razlike su izračunate u različitim sustavima visina, uz izmjerene vrijednosti ubrzanja sile teže. Kompletiranjem podataka koji su rezultat nivelmanske i gravimetrijske izmjere, u ovom radu je cilj objasniti sustave visina i utjecaj ubrzanja sile teže na različite vrste visina.

Abstract (english)

Geometric leveling represents the most precise height determining method in geodesy. Using precise leveling, height differences can be measured with high accuracy of 1 mm per kilometer of measured leveling distance. Ideally, a closed leveling circuit should yield a sum of height differences equal to zero; however, the impact of gravity acceleration causes deviations from this ideal scenario. To analyze this influence, a leveling network was established by measuring height differences using geometric leveling and relative gravimetric measurements. There are multiple height systems (geopotential, dynamic, orthometric, and normal heights) that vary depending on the selection of the chosen reference surface (geoid, quasi-geoid, ellipsoid). Height differences were calculated in different height systems using measured values of gravity acceleration. By integrating data resulting from leveling and gravimetric surveys, this study aims to explain height systems and the impact of gravity acceleration on different types of heights.

• Keywords: geometrijski nivelman; relativna gravimetrija; ubrzanje sile teže; visine
• Keywords (english): heights; geometric leveling; gravity acceleration; relative gravimetry
• Language: croatian
• URN:NBN: urn:nbn:hr:256:103793
• Study programme: Title: Geodesy and Geoinformatics; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka geodezije i geoinformatike (magistar/magistra inženjer/inženjerka geodezije i geoinformatike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2024-09-17 11:58:25