izpis_h1_title_alt

Modeliranje vertikalnih gradientov težnosti iz geodetskih in geofizikalnih podatkov za obdelavo gravimetričnih meritev : doktorska disertacija
ID Medved, Klemen (Author), ID Koler, Božo (Mentor) More about this mentor... This link opens in a new window, ID Odalović, Oleg R. (Co-mentor), ID Kuhar, Miran (Thesis defence commission member), ID Vrabec, Marko (Thesis defence commission member), ID Bašić, Tomislav (Thesis defence commission member)

.pdfPDF - Presentation file, Download (19,14 MB)
MD5: 8A921CDD8C7AF1BEBF7D9F33917D8586

Abstract
V doktorski disertaciji se ukvarjamo z modeliranjem vertikalnega gradienta težnosti. Poznavanje vertikalnega gradienta težnostnega polja ima v gravimetriji in posledično geodeziji namreč velik pomen, saj moramo težni pospešek, izmerjen z instrumentom reducirati na stabilizirano točko. Na osnovi danih geodetskih in geofizikalnih podatkov lahko kreiramo različne kombinacije modelov, iz katerih izračunamo vertikalne gradiente težnosti. Zanima nas natančnost tako pridobljenih vrednosti. V ta namen smo z relativnima gravimetroma Scintrex CG-3M in CG-5 izmerili vertikalne gradiente težnosti na 44 testnih točkah, obdelali meritve in na podlagi rezultatov dobili referenčne vrednosti. Ti nam služijo za empirično preizkušanje vplivov posameznih elementov v postopku modeliranja na končne rezultate. Na podlagi odstopanj merjenih in modeliranih vrednosti smo lahko izvedli analize in statistične ocene rezultatov. Na podlagi tega smo pridobili optimalen model in kriterije za izbor podatkov v procesu modeliranja vertikalnih gradientov težnosti. Na nizu testnih točk smo primerjali tudi vrednosti pridobljene iz nekaterih globalnih modelov težnostnega polja Zemlje, ki so pridobljeni s pomočjo satelitske tehnologije. Za potrebe modeliranja je bil na podlagi obstoječih geoloških podatkov kreiran nov model gostot topografskih mas Slovenije, ki smo ga uporabili v postopku modeliranja vertikalnih gradientov težnosti. Po več desetletjih so bile na podlagi novih in kvalitetnejših podatkov izdelane tudi nove karte gravimetričnih anomalij Republike Slovenije, vključno z novo karto Bouguerovih anomalij. V ta namen smo izvedli analizo obstoječih gravimetričnih podatkov in odstranili grobe napake iz podatkovnih nizov.

Language:Slovenian
Keywords:doktorske disertacije, geodezija, Grajeno okolje, težnostno polje Zemlje, gravimetrija, vertikalni gradient težnosti, modeliranje, anomalije težnosti, karta Bouguerovih anomalij, gravimeter, gravimetrične meritve, digitalni model reliefa
Work type:Doctoral dissertation
Typology:2.08 - Doctoral Dissertation
Organization:FGG - Faculty of Civil and Geodetic Engineering
Place of publishing:Ljubljana
Publisher:[K. Medved]
Year:2023
Number of pages:XXXII, 210 str., [26] str. pril
PID:20.500.12556/RUL-143973-a414e693-b59f-9dd3-3c9b-d14e4124ddd1 This link opens in a new window
UDC:528.27+550.312(497.4)(043)
COBISS.SI-ID:140047363 This link opens in a new window
Publication date in RUL:25.01.2023
Views:1109
Downloads:103
Metadata:XML RDF-CHPDL DC-XML DC-RDF
:
Copy citation
Share:Bookmark and Share

Secondary language

Language:English
Title:Modeling of vertical gravity gradients from geodetic and geophysical data for processing gravimetric measurements : doctoral dissertation
Abstract:
In the doctoral dissertation we deal with the modeling of the vertical gravity gradient. The knowledge of the vertical gradient of the gravity field is of great importance in gravimetry and consequently in geodesy, since the gravity acceleration measured with the instrument must be reduced to a stabilized point. Based on the given geodetic and geophysical data, we can create various combinations of models from which we calculate the vertical gravity gradients. We are interested in the accuracy of the modeled values. For this purpose, we measured the vertical gravity gradients at 44 test points using Scintrex CG-3M and CG-5 relative gravimeters, processed the measurements and obtained reference values. We use these to empirically test the effects of individual elements in the modeling process on the final results. Based on the deviations between the measured and modeled values, we were able to perform analyzes and statistical evaluations of the results. This allows us to determine the optimal model and data selection criteria for modeling vertical gravity gradients. We also compared values calculated from some global models of the Earth’s gravity field created using satellite technology. For the purpose of modeling, a new model of the density of topographic masses of Slovenia was created based on existing geological data. It was used for modeling of vertical gravity gradients. After several decades, new maps of gravimetric anomalies of the Republic of Slovenia were created based on new and improved input data, including a new map of Bouguer anomalies. For this purpose, an analysis of the existing gravimetric data was performed and some gross errors were removed from the data sets.

Keywords:Built Environment, geodesy, doctoral thesis, earth's gravitational field, gravimetry, vertical gravity gradient, modeling, gravity anomalies, Bouguer anomaly, map, gravimeter, gravimetric measurements, digital terrain model

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Back