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Department of Theoretical Geodesy

Today Inland projects at The Department of Theoretical Geodesy:

Former Inland projects at The Department of Theoretical Geodesy:

 


Project title:
Prediction of Archeological Sites
Principal investigator:
Ing. Jana Faixová Chalachanová, PhD.
Abstract:
Project is focused on development and publication of the Predicting Map of Archeological Sites (PMAS) from Dolné Považie region by methods of prediction modeling with an application of environmental and social parameters which influence the deployment of archeological sites. One of the main objectives of the project is to define uncertain character of parameters which influence the deployment archeological sites. To solve this objective it is necessary to apply fuzzy logic in statistical analysis. PMAS will contribute to effective protection of the Slovak cultural-historical heritage.
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Project title:
Troposphere Modeling on the Territory of Slovakia Using Permanent GNSS Observations for Near Real Time Applications
Principal investigator:
Ing. Ján Hefty, PhD.
Abstract:
Project is focused on using permanent GNSS (Global Navigation Satellite Systems) observations for modeling of troposphere. At present there are five active permanent GNSS stations in Slovakia and we expect significant increase of the number of stations in the near future. The stations are used for definition and realization of geodetic reference system and for research of regional geodynamics. The team of the project proposer provides continual processing and analysis of the observations in national and also European frameworks. There are obtained information on actual state of troposphere in form of ZTD (Zenith Tropospheric Delay) and PWV (Precipitable Water Vapour) within the analysis. This method provides the data with high time and space resolution. Within the project we assume establishment of system for continual monitoring of actual state of troposphere and providing the results in real time to users from community of atmosphere researchers, for processing of geodetic observations, meteorology and for warning system for hydrology risks forecast.
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Project title:
Quality Evaluation in a Cadastral Domain
Principal investigator:
Ing. Jana Faixova Chalachanova, PhD.
Abstract:
Research project is focused on the evaluation of a quality within a cadastral domain in the terms of its specification. It discusses the principles of quality evaluation – data quality parameters, data quality evaluation procedures and the documentation of a domain and the results of quality evaluation. The definitions respect the ISO 19100 series of international standards. Cadastral domain model uses UML, with respect to the principles of object-oriented modelling. Quality model of a chosen domain is associated to the metadata model specified according to the STN EN ISO 19115:2005 Geografická informácia – Metadáta standard.
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Project title:
Refinement of the Earth Gravity Field Models Using Gradiometric Measurements
Principal investigator:
Ing. Juraj Janak, PhD.
Abstract:
The project is focused on utilisation of gravitation tensor to improve our knowledge about the geometry of the Earth gravity field. In frame of this project we intend to use the measurements of European satellite mission GOCE which launch is scheduled to be in the autumn 2007. Measurements of the second partial derivatives of the gravitation potential are more sensitive to fine anomalous structures of the Earth gravitation field inspite of the smoothing due to altitude of the satellite orbit (approximately 250 km).
The project will be in particular focused on following topics: effective processing of satellite gradiometry data, their optimal downward continuation down to the Earth surface, transformation of anomalous gravity tensor to the gravity anomalies or gravity disturbances and optimal combination of satellite and terrestrial data. In the last stage we will use all experiences and results to compile the refined model of quasigeoid and model of deflections of the vertical in Slovakia.
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Project title:
Monitoring and Analysis of Short-Term Variations in Positions Using Global Navigation Systems
Principal investigator:
prof. Ing. Jan Hefty, PhD.
Abstract:
Systematic processing of GNSS (global navigation satellite systems) observations within the network of European permanent stations. Analysis of permanent network situated in the whole European continent or central Europe respectively. Processing in several alternatives allowing analysis of position changes - from secular and seasonal to high-frequency with few hours periodicity. Coordinate time series of monitored points used for study of position changes based on geodynamic influence. Analysis of dependence between observed seasonal position changes and geodynamic processes or local troposphere variations respectively. Using of long-term continual GNSS observations for study of tidal effects by means of linear and non-linear time series analysis. Interpretation of obtained parameters in relation to permanent station locality.
The aim of the project is provide plausible image on GNSS potential for monitoring of position changes on millimeter level, possible perturbations elimination and for identification and interpretation of short-time geodynamic phenomenon.
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Project title:
Application of Effective Methods for Solving Boundary Value Problems in Geodesy
Principal investigator:
doc. Ing. Marcel Mojzes, PhD.
Abstract:
Project is focused on achieving higher precision in quasi-geoid determination within Slovakia by means of standard solution of third boundary value problem using more appropriate mathematical theories, global geopotential Earth models and more precise and more homogenous gravimetric and topographic data.
Next part of the project is aimed to solving second boundary value problem using boundary elements. It is non-traditional method for quasi-geoid determination which brings more objective influence of remote zones. The inputs are gravity disturbances measured on Earth surface only. Quality verification of both methods will be done by independent standard test using GPS/leveling method or direct observations of astronomical-geodetic deflections of the vertical by circumzenithal 50/500 and 100/1000 where systematic errors were detected using GPS/leveling verification method.
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Project title:
Standardization and Inter-Operability of Geographical Information
Principal investigator:
Ing. Jana Faixova Chalachanova, PhD.
Abstract:
Project solves need for geographic information interoperability in a process from national to global geographic information standardization. It tests new concepts of standardization – standardization as geographic information interoperability (cooperation among information activities) while until now the term standardization represents mainly data exchange formats standardization.
The project determines methods and procedures of meta-information systems creation based on determining meta-information standards using open GIS principle and object-oriented architecture.