László Bányai - Academia.edu (original) (raw)

Papers by László Bányai

Research paper thumbnail of Investigation of GPS antenna mean phase centre offsets using a full roving observation strategy

Journal of geodesy, Jun 27, 2005

ABSTRACT

Research paper thumbnail of Single Station and Single Satellite Method of GPS Ionospheric Data Processing

Acta Geodaetica Et Geophysica Hungarica, Aug 22, 2013

The Single Station and Single Satellite Method is introduced as an alternative of the world-wide ... more The Single Station and Single Satellite Method is introduced as an alternative of the world-wide used method, where the multi-satellite GPS observations are analized for ionospheric purposes in one processing procedure.According to the analogy of spherical distances, “ionospheric” distances are computed from the geographic latitude and local time of the ionospheric points along the satellite pass, therefore the TEC values can be modelled as single variable quantities using the Legendre polynomials.The least-squares adjustment of the observations by the Gauss-Markov model shows very large correlation between the code bias and the zero as well as the even order terms of the polynomials, which leads to false solution usually over the 2nd order. The zero and odd order terms of the Legendre polynomials proved to be a good choice, where the inner accuracy of code bias is better than 1 cm and the larger changes of TEC profile can be described properly.The comparison of the results with the procedure developed at DLR Remote Sensing Ground Station, Neustrelitz, Germany, shows the effectiveness of the method.

Research paper thumbnail of Investigation of the single layer model of GPS ionospheric data processing using IRI-90 and the attached diffusive equilibrium model of plasmaspheric electron density

Annals of Geophysics, Dec 18, 1997

Research paper thumbnail of The role of the elastic rebound theory in design and evaluation of deformation surveys

Tectonophysics, Feb 1, 1992

Research paper thumbnail of On the possibilities of coordinated ionospheric soundings and GPS measurements

Annals of Geophysics, May 18, 1994

Research paper thumbnail of Investigation of receiver parameters in satellite Doppler positioning

Research paper thumbnail of Calibration of Doppler receivers

Publications of the Astronomical Institute of the Czechoslovak Academy of Sciences, 1984

ABSTRACT

Research paper thumbnail of The DunaszekcsÅ landslide and post-event movements: possible southward spread?

EGUGA, May 1, 2010

Abstract After more and more significant deformations and accelerating displacements, rapid movem... more Abstract After more and more significant deformations and accelerating displacements, rapid movements took place on the right bank of the Danube at Dunaszekcso (Hungary) in February, 2008 as the main phase of an enormous slope failure. It had a dimension of 220 ...

Research paper thumbnail of Comparison of turborogue and trimble ssi gps receives for ionospheric investigation under anti-spoofing

Research paper thumbnail of Relationship between slope stability and vital processes of vegetation

Abstract–Vegetation on areas prone to mass movements plays a very important role in the slope sta... more Abstract–Vegetation on areas prone to mass movements plays a very important role in the slope stability. For monitoring riverbank movements two geodetic test sites were established on the high loess bank of the River Danube at Dunaföldvár and Dunaszekcső in Hungary. ...

Research paper thumbnail of Three-dimensional adjustment of integrated geodetic observables in Earth-centred and Earth-fixed coordinate system

Acta geodaetica et geophysica, Jan 23, 2013

Research paper thumbnail of Single Station and Single Satellite Method of GPS Ionospheric Data Processing

Acta Geodaetica et Geophysica Hungarica

The Single Station and Single Satellite Method is introduced as an alternative of the world-wide ... more The Single Station and Single Satellite Method is introduced as an alternative of the world-wide used method, where the multi-satellite GPS observations are analized for ionospheric purposes in one processing procedure.According to the analogy of spherical distances, “ionospheric” distances are computed from the geographic latitude and local time of the ionospheric points along the satellite pass, therefore the TEC values can be modelled as single variable quantities using the Legendre polynomials.The least-squares adjustment of the observations by the Gauss-Markov model shows very large correlation between the code bias and the zero as well as the even order terms of the polynomials, which leads to false solution usually over the 2nd order. The zero and odd order terms of the Legendre polynomials proved to be a good choice, where the inner accuracy of code bias is better than 1 cm and the larger changes of TEC profile can be described properly.The comparison of the results with the procedure developed at DLR Remote Sensing Ground Station, Neustrelitz, Germany, shows the effectiveness of the method.

Research paper thumbnail of A dunaszekcsői magaspart 2007 és 2015 közötti mozgásfolyamatai

Research paper thumbnail of Rutschungsprozesse des Hochufers der Donau bei Dunaszekcső, Ungarn = Sliding processes of the high bank of the River Danube at Dunaszekcso, Hungary

The paper describes the investigation of the mass movements of one of the most dangerous high ban... more The paper describes the investigation of the mass movements of one of the most dangerous high banks along the River Danube at Dunaszekcso in Hungary. Cracks appeared on this part of the high bank in 2007, indicating the beginning of a new landslide. In autumn of the same year, a geodetic network for observation of the movements was created. The network was measured with GNSS-equipment, Total Stations (direction and distance measurements) and precision levels. In addition, two borehole tiltmeters were installed for continuous measurements. The relationships between the movements and the variations of hydrological, meteorological parameters and the effect of the vegetation were studied to reveal the causes of the movements. It has been found that the ground water level variation relative to the water level of the Danube strongly affects the stability of the high bank.

Research paper thumbnail of On the possibilities of coordinated ionospheric soundings and GPS measurements

Annals of Geophysics, 1994

onospheric soundings carried out at the same site and simultaneously with GPS measurements could ... more onospheric soundings carried out at the same site and simultaneously with GPS measurements could contribute to the better understanding of the variations of the total electron content. However, for this purpose the total electron content deduced from GPS measurements must be converted to the place of observation. A method based on an interpolation considered as boundary value problem is recommended for this conversion. Furthermore, the possibilities of the application of datapobtained by ionopheric soundiings in GPS measurements are discussed and also preliminary results of model calculations are presented.

Research paper thumbnail of Three-dimensional adjustment of integrated geodetic observables in Earth-centred and Earth-fixed coordinate system

Acta Geodaetica et Geophysica, 2013

Research paper thumbnail of Investigation of the single layer model of GPS ionospheric data processing using IRI-90 and the attached diffusive equilibrium model of plasmaspheric electron density

Annals of Geophysics, Nov 25, 1997

Research paper thumbnail of A dunaszekcsői földcsuszamlás mozgási tendenciája és modellje koordináta idősorok alapján

Research paper thumbnail of A dunaszekcsői magaspartcsuszamlás geodéziai megfigyelése

Research paper thumbnail of Kinematics and dynamics of a river bank failure determined by integrated geodetic observations Case study of Dunacsekcső landslide, Hungary

Conference Proceedings on 1st Annual International Conference on Geological & Earth Sciences, 2012

Research paper thumbnail of Investigation of GPS antenna mean phase centre offsets using a full roving observation strategy

Journal of geodesy, Jun 27, 2005

ABSTRACT

Research paper thumbnail of Single Station and Single Satellite Method of GPS Ionospheric Data Processing

Acta Geodaetica Et Geophysica Hungarica, Aug 22, 2013

The Single Station and Single Satellite Method is introduced as an alternative of the world-wide ... more The Single Station and Single Satellite Method is introduced as an alternative of the world-wide used method, where the multi-satellite GPS observations are analized for ionospheric purposes in one processing procedure.According to the analogy of spherical distances, “ionospheric” distances are computed from the geographic latitude and local time of the ionospheric points along the satellite pass, therefore the TEC values can be modelled as single variable quantities using the Legendre polynomials.The least-squares adjustment of the observations by the Gauss-Markov model shows very large correlation between the code bias and the zero as well as the even order terms of the polynomials, which leads to false solution usually over the 2nd order. The zero and odd order terms of the Legendre polynomials proved to be a good choice, where the inner accuracy of code bias is better than 1 cm and the larger changes of TEC profile can be described properly.The comparison of the results with the procedure developed at DLR Remote Sensing Ground Station, Neustrelitz, Germany, shows the effectiveness of the method.

Research paper thumbnail of Investigation of the single layer model of GPS ionospheric data processing using IRI-90 and the attached diffusive equilibrium model of plasmaspheric electron density

Annals of Geophysics, Dec 18, 1997

Research paper thumbnail of The role of the elastic rebound theory in design and evaluation of deformation surveys

Tectonophysics, Feb 1, 1992

Research paper thumbnail of On the possibilities of coordinated ionospheric soundings and GPS measurements

Annals of Geophysics, May 18, 1994

Research paper thumbnail of Investigation of receiver parameters in satellite Doppler positioning

Research paper thumbnail of Calibration of Doppler receivers

Publications of the Astronomical Institute of the Czechoslovak Academy of Sciences, 1984

ABSTRACT

Research paper thumbnail of The DunaszekcsÅ landslide and post-event movements: possible southward spread?

EGUGA, May 1, 2010

Abstract After more and more significant deformations and accelerating displacements, rapid movem... more Abstract After more and more significant deformations and accelerating displacements, rapid movements took place on the right bank of the Danube at Dunaszekcso (Hungary) in February, 2008 as the main phase of an enormous slope failure. It had a dimension of 220 ...

Research paper thumbnail of Comparison of turborogue and trimble ssi gps receives for ionospheric investigation under anti-spoofing

Research paper thumbnail of Relationship between slope stability and vital processes of vegetation

Abstract–Vegetation on areas prone to mass movements plays a very important role in the slope sta... more Abstract–Vegetation on areas prone to mass movements plays a very important role in the slope stability. For monitoring riverbank movements two geodetic test sites were established on the high loess bank of the River Danube at Dunaföldvár and Dunaszekcső in Hungary. ...

Research paper thumbnail of Three-dimensional adjustment of integrated geodetic observables in Earth-centred and Earth-fixed coordinate system

Acta geodaetica et geophysica, Jan 23, 2013

Research paper thumbnail of Single Station and Single Satellite Method of GPS Ionospheric Data Processing

Acta Geodaetica et Geophysica Hungarica

The Single Station and Single Satellite Method is introduced as an alternative of the world-wide ... more The Single Station and Single Satellite Method is introduced as an alternative of the world-wide used method, where the multi-satellite GPS observations are analized for ionospheric purposes in one processing procedure.According to the analogy of spherical distances, “ionospheric” distances are computed from the geographic latitude and local time of the ionospheric points along the satellite pass, therefore the TEC values can be modelled as single variable quantities using the Legendre polynomials.The least-squares adjustment of the observations by the Gauss-Markov model shows very large correlation between the code bias and the zero as well as the even order terms of the polynomials, which leads to false solution usually over the 2nd order. The zero and odd order terms of the Legendre polynomials proved to be a good choice, where the inner accuracy of code bias is better than 1 cm and the larger changes of TEC profile can be described properly.The comparison of the results with the procedure developed at DLR Remote Sensing Ground Station, Neustrelitz, Germany, shows the effectiveness of the method.

Research paper thumbnail of A dunaszekcsői magaspart 2007 és 2015 közötti mozgásfolyamatai

Research paper thumbnail of Rutschungsprozesse des Hochufers der Donau bei Dunaszekcső, Ungarn = Sliding processes of the high bank of the River Danube at Dunaszekcso, Hungary

The paper describes the investigation of the mass movements of one of the most dangerous high ban... more The paper describes the investigation of the mass movements of one of the most dangerous high banks along the River Danube at Dunaszekcso in Hungary. Cracks appeared on this part of the high bank in 2007, indicating the beginning of a new landslide. In autumn of the same year, a geodetic network for observation of the movements was created. The network was measured with GNSS-equipment, Total Stations (direction and distance measurements) and precision levels. In addition, two borehole tiltmeters were installed for continuous measurements. The relationships between the movements and the variations of hydrological, meteorological parameters and the effect of the vegetation were studied to reveal the causes of the movements. It has been found that the ground water level variation relative to the water level of the Danube strongly affects the stability of the high bank.

Research paper thumbnail of On the possibilities of coordinated ionospheric soundings and GPS measurements

Annals of Geophysics, 1994

onospheric soundings carried out at the same site and simultaneously with GPS measurements could ... more onospheric soundings carried out at the same site and simultaneously with GPS measurements could contribute to the better understanding of the variations of the total electron content. However, for this purpose the total electron content deduced from GPS measurements must be converted to the place of observation. A method based on an interpolation considered as boundary value problem is recommended for this conversion. Furthermore, the possibilities of the application of datapobtained by ionopheric soundiings in GPS measurements are discussed and also preliminary results of model calculations are presented.

Research paper thumbnail of Three-dimensional adjustment of integrated geodetic observables in Earth-centred and Earth-fixed coordinate system

Acta Geodaetica et Geophysica, 2013

Research paper thumbnail of Investigation of the single layer model of GPS ionospheric data processing using IRI-90 and the attached diffusive equilibrium model of plasmaspheric electron density

Annals of Geophysics, Nov 25, 1997

Research paper thumbnail of A dunaszekcsői földcsuszamlás mozgási tendenciája és modellje koordináta idősorok alapján

Research paper thumbnail of A dunaszekcsői magaspartcsuszamlás geodéziai megfigyelése

Research paper thumbnail of Kinematics and dynamics of a river bank failure determined by integrated geodetic observations Case study of Dunacsekcső landslide, Hungary

Conference Proceedings on 1st Annual International Conference on Geological & Earth Sciences, 2012