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Wyświetlanie 1-15 z 17
Tytuł:
Short-term and long-term variability of antenna position due to thermal bending of pillar monument at permanent GNSS station
Autorzy:
Gerhatova, L.
Hefty, J.
Spanik, P.
Powiązania:
https://bibliotekanauki.pl/articles/106753.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
precise inclination sensor observations
GNSS monument instability
thermal deformations
obserwacje
czujnik pochylenia
GNSS
odkształcenia termiczne
Opis:
The variability of daily site coordinates at permanent GNSS station is a sum of many disturbing factors influencing the actual satellite observations, data processing, and bias modelling. In the paper are analysed possibilities of monitoring the instability of GNSS antenna pillar monument by the independent observations using the precise inclination sensor. Long-term series from three different types of pillars show specific features in amplitude and temporal evolution of monument bending. Correlations with daily temperature and/or solar radiation changes were proved.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 100; 67-77
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation on reflection of tectonic pattern in ASG EUPOS data in the Sudetes and adjacent areas
Autorzy:
Szczerbowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/106837.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
neotectonics
permanent GPS/GNSS observations
lineaments
horizontal displacements
neotektonika
obserwacja stała
obserwacja GPS/GNSS
lineamenty
przemieszczenia poziome
Opis:
The GNSS data evaluated from on observation of ASG EUPOS stations in the Sudety Mts. and in adjacent areas is analyzed by the author in the scope of disturbances in daily solutions that can be induced by tectonics stress. The daily position changes derived from GNSS data demonstrate the long or short term trends, which are affected by offsets of different nature. Author presents an analysis based on frequency of parameter – displacement vector azimuth. The aim of the analysis is to show statistical significance of observed small values of temporal displacements, which values are not normally distributed. There are “outliers” of the normal distribution of displacement azimuths, which values show a certain reproducibility, which corresponds to orientations of tectonic lines. That suggests small, short time movements along boundaries of horsts and grabens – a crustal-extension structure of the area. However derived results (values of displacements) are less than a limitation error, temporal distributions of coordinates are not random as usually data errors. So in author’s opinion the spatial-temporal evolution of horizontal displacements of ASG EUPOS stations in the Sudety Mts. and in adjacent areas are determined by expressions of underlying geological structures.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 102; 32-51
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Permanent GNSS observations at AGH-UST satellite observatory
Autorzy:
Kudrys, J.
Powiązania:
https://bibliotekanauki.pl/articles/106822.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
satellite observatory
GNSS
AGH-UST
obserwatorium satelitarne
Opis:
GPS satellite observations at the Faculty of Mining Surveying and Environmental Engineering AGH-UST are conducted since the early 90s of the last century. In 2001, efforts have been made on getting permanently functioning GPS station. At present, observatory is EPN operational center for two GNSS stations KRAW and KRA1. Moreover, KRA1 station is one of fundamental control points in polish horizontal network. The article gives the history and scope of the research carried out in the satellite observatory AGH-UST during the period 2001-2015.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 100; 101-107
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geodetic and geodynamic studies at Department of Geodesy and Geodetic Astronomy WUT
Autorzy:
Brzeziński, A.
Barlik, M.
Andrasik, E.
Izdebski, W.
Kruczyk, M.
Liwosz, T.
Olszak, T.
Pachuta, A.
Pieniak, M.
Próchniewicz, D.
Rajner, M.
Szpunar, R.
Tercjak, M.
Walo, J.
Powiązania:
https://bibliotekanauki.pl/articles/106807.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
physical geodesy
satellite measurement techniques
GNSS meteorology
geodynamic studies
geodezja fizyczna
technika pomiarów satelitarnych
meteorologia GNSS
badania geodynamiczne
Opis:
The article presents current issues and research work conducted in the Department of Geodesy and Geodetic Astronomy at the Faculty of Geodesy and Cartography at Warsaw University of Technology. It contains the most important directions of research in the fields of physical geodesy, satellite measurement techniques, GNSS meteorology, geodynamic studies, electronic measurement techniques and terrain information systems.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 100; 165-200
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-energy seismic events in Legnica-Głogów Copper District in light of ASG-EUPOS data
Autorzy:
Szczerbowski, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/106865.pdf
Data publikacji:
2019
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
neotectonics
permanent GPS/GNSS observations
horizontal displacements mining tremors
neotektonika
stałe obserwacje GPS / GNSS
przemieszczenia poziome
wstrząsy górnicze
Opis:
Seismic events in the area of Poland are related mostly to copper and coal mining, and they are regarded as the most dangerous natural hazard. Although development of geomechanical modelling as the development of geophysical methods determining seismic hazard are evident, low predictability of the time-effect relationship still remains. Geomechanical models as geophysical data analysis highlight the interaction between parts of rock mass or allow to reconstruct the way of rock mass destruction and to understand the processes that take place in the high-energy tremors. However, the association of larger mining tremors with pre-existing geological features has been reported by many investigators; in geomechanical practice, investigations of rock mass condition concentrate on this problem in the local scale. Therefore, the problem of relations between high-energy seismic events in Legnica–Głogów Copper District (LGCD) and regional scale deformations of terrain surface resulting from possible tectonic activity is discussed in this paper. The GNSS data evaluated from the observations of ASG-EUPOS (Active Geodetic Network – EUPOS) stations in the area of LGCD and in the adjacent areas is analysed in this study. Temporal variation of distances between the stations and evaluated on that base so called apparent strain was combined with the occurrence of high-energy tremors. Consequently, after the examination and analysis of occurrences of mining tremors, it is found that high-energy seismic events and periods of strain accumulation evaluated from GPS/GNSS data have temporal relations. Although the seismic events were triggered by mining, nearly all the events with energy E > 108 J occurred in the periods when the analysed stations’ positions demonstrated a decrease in the baseline length.
Źródło:
Reports on Geodesy and Geoinformatics; 2019, 107; 25-40
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of vertical movements of the European crust using tide gauge and GNSS observations
Autorzy:
Tretyak, K.
Dosyn, S.
Powiązania:
https://bibliotekanauki.pl/articles/106909.pdf
Data publikacji:
2014
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
vertical land movement
tide gauge
GNSS observations
sea level change
ruch pionowy ziemi
wskaźnik odpływu
obserwacje GNSS
zmiany poziomu morza
Opis:
This research is devoted to the study of vertical movements of the European crust on the basis of two independent methods, namely tide gauge and GNSS observations results. The description and classification of factors affecting sea level change has been made. The precision with which the movement of the earth's crust according to the results of tide gauge observations can be explored has been calculated. A methodology to identify the duration of tide gauge observations required for studies of vertical movements of the earth's crust has been presented. Approximation of tide gauge time series with the help of Fourier series has been implemented, the need for long-term observations in certain areas has been explained. The diagram of the velocities of the vertical movements of the European crust on the basis of the tide gauge data and GNSS observations has been built and the anomalous areas where the observations do not coincide have been identified.
Źródło:
Reports on Geodesy and Geoinformatics; 2014, 97; 112-131
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of the Polish geodetic reference frame by means of a new solution based on permanent GNSS data from the years 2011-2014
Autorzy:
Liwosz, T.
Ryczywolski, M.
Powiązania:
https://bibliotekanauki.pl/articles/106725.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
reference frames
GNSS
ETRF2000
ASG-EUPOS
ramy referencyjne
Opis:
The new solution for the Polish geodetic primary GNSS network was created to verify the currently used reference frame (PL-ETRF2000). The new solution is based on more GNSS data (more daily observation sessions included, a longer data timespan, GLONASS observations added) which were processed in a newer reference frame (IGb08) according to up-to-date methodology and using the latest version of Bernese GNSS Software. The new long-term solution (spanning 3.7 years) was aligned to the IGb08 reference frame using a minimum constraints approach. We categorized Polish reference stations into two categories according to their data length. We obtained good agreement of the new solution with the PL-ETRF2000: for most stations position differences did not exceed 5 mm in horizontal, and 10 mm in vertical components. However, for 30 stations we observed discontinuities in position time series, mostly due to GNSS equipment changes, which occured after the introduction of PL-ETRF2000. Position changes due to the discontinuities reached 9.1 mm in horizontal components, and 26.9 mm in vertical components. The new solution takes into account position discontinuities, and in addition also includes six new stations which were installed after the introduction of the PL-ETRF2000. Therefore, we propose to update the currently-used reference frame for the Polish geodetic primary network (PL-ETRF2000) with the new solution. The new solution was also accepted by the EUREF Technical Working Group as a class A solution (highest accuracy) according to EUREF standards.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 102; 52-66
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Airborne measurement system during validation of EGNOS/GNSS essential parameters in landing
Autorzy:
Fellner, A.
Jafernik, H.
Powiązania:
https://bibliotekanauki.pl/articles/106891.pdf
Data publikacji:
2014
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
Flight Validation
RNAV
EGNOS/GNSS
LPV
pomiary
loty
walidacja
Opis:
The air transport requires certificate of ground and deck devices, systems and adequate procedures. However applied geodetic techniques and measuring technologies depend on taken undertakings. If one should precisely put standard ground systems and the navigational assistance are overbalancing static geodetic techniques and measuring technologies. However operational activity, depending on the phase of the flight a real requires applying geodetic techniques and measuring "technologies time". As part of conducted air tests they made the validation of four fundamental parameters (accuracy, credibility, availability, continuity) of satellite EGNOS, GNSS signals, made as part of European projects: "Support to the EGNOS APV Operational Implementation - APV MIELEC", air tests enabled to draw right procedures up and to apply satellite signals in the air transport. Details will be presented in the following article.
Źródło:
Reports on Geodesy and Geoinformatics; 2014, 96; 27-37
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deformation analysis in central west Bulgaria using triangulation and GPS data
Autorzy:
Dimitrov, Nikolay
Powiązania:
https://bibliotekanauki.pl/articles/106859.pdf
Data publikacji:
2019
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
deformation analysis
GNSS
triangulation
active tectonics
analiza deformacji
triangulacja
tektonika
Opis:
The article discusses a method applied for combining the results of Global Navigation Satellite Systems (GNSS) and 75-year old triangulation measurements to estimate the crustal movements in central western Bulgaria region. It was examined for joint analysis based on the results of GNSS with angular measurements of the first order triangulation network in Bulgaria during the period 1923–1930 year. As a result of the processing of GNSS and angular measurements, horizontal velocities of 15 points, strain rates, and rotation rates have been obtained. The results show dominating N–S extension at a rate of 1–2 mm/y and the deformation is not uniformly distributed over the studied area. The obtained results indicate the possibility of using old angular measurement of first-order triangulation points, together with GNSS data, to obtain estimates of the horizontal crustal movements.
Źródło:
Reports on Geodesy and Geoinformatics; 2019, 108; 23-26
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of changes of the kinematic parameters of Antarctic tectonic plate using data observations of permanent GNSS stations
Autorzy:
Tretyak, K.
Holubinka, Y.
Forat, A.
Powiązania:
https://bibliotekanauki.pl/articles/106893.pdf
Data publikacji:
2017
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
GNSS
Euler pole
Antarctic tectonic plate
biegun Eulera
płyta tektoniczna Antarktyki
Opis:
The paper describes a modified algorithm of determination of the Euler pole coordinates and angular velocity of the tectonic plate, considering the continuous and uneven distribution of daily measurements of GNSS permanent stations. Using developed algorithm were determined the mean position of Euler pole and angular velocity of Antarctic tectonic plate and their annual changes. As the input data, we used the results of observations, collected on 28 permanent stations of the Antarctic region, within the period from 1996 to 2014.
Źródło:
Reports on Geodesy and Geoinformatics; 2017, 103; 119-135
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards reliable velocities of permanent GNSS stations
Autorzy:
Bogusz, J.
Klos, A.
Gruszczynska, M.
Gruszczynski, M.
Powiązania:
https://bibliotekanauki.pl/articles/106797.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
GNSS
time series
noise analysis
velocities
szereg czasowy
analiza hałasu
prędkość
Opis:
In the modern geodesy the role of the permanent station is growing constantly. The proper treatment of the time series from such station lead to the determination of the reliable velocities. In this paper we focused on some pre-analysis as well as analysis issues, which have to be performed upon the time series of the North, East and Up components and showed the best, in our opinion, methods of determination of periodicities (by means of Singular Spectrum Analysis) and spatio-temporal correlations (Principal Component Analysis), that still exist in the time series despite modelling. Finally, the velocities of the selected European permanent stations with the associated errors determined following power-law assumption in the stochastic part is presented.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 100; 17-26
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a precise local quasigeoid model for the city of Krakow – QuasigeoidKR2019
Autorzy:
Banasik, Piotr
Bujakowski, Kazimierz
Kudrys, Jacek
Ligas, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/1396889.pdf
Data publikacji:
2020
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
local quasi geoid
GNSS
levelling data
height anomaly
QuasigeoidKR2019
cross-validation
Opis:
A geoid or quasigeoid model allows the integration of satellite measurements with ground levelling measurements in valid height systems. A precise quasigeoid model has been developed for the city of Krakow. One of the goals of the model construction was to provide a more detailed quasigeoid course than the one offered by the national model PL-geoid2011. Only four measurement points in the area of Kraków were used to build a national quasigeoid model. It can be assumed that due to the small number of points and their uneven distribution over the city area, the quasigeoid can be determined less accurately. It became the reason for developing a local quasigeoid model based on a larger number of evenly distributed points. The quasigeoid model was based on 66 evenly distributed points (from 2.5 km to 5.0 km apart) in the study area. The process of modelling the quasigeoid used height anomalies determined at these points on the basis of normal heights derived through levelling and ellipsoidal heights derived through GNSS surveys. Height anomalies coming from the global geopotential model EGM2008 served as a long-wavelength trend in those derived from surveys. Analyses showed that the developed height anomaly model fits the empirical data at the level of single millimetres – mean absolute difference 0.005 m. The developed local model QuasigeoidKR2019, similar to the national model PL-geoid2011, are models closely related to the reference and height systems in Poland. Such models are used to integrate GNSS and levelling observations. A comparison of the local QuasigeoidKR2019 and national PL-geoid2011 model was made for the reference frame PL-ETRF2000 and height datum PL-KRON86-NH. The comparison of the two models with respect to GNSS/levelling height anomalies shows a triple reduction in the values of individual quartiles and a mean absolute difference for the developed local model. These summary statistics clearly indicate that the accuracy of the local model for the city of Krakow is significantly higher than that of the national one.
Źródło:
Reports on Geodesy and Geoinformatics; 2020, 109; 25-31
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Complex geodetic research in Ukrainian Antarctic station "Academician Vernadsky" (years 2002-2005, 2013-2014)
Autorzy:
Tretyak, K.
Hlotov, V.
Holubinka, Y.
Marusazh, K.
Powiązania:
https://bibliotekanauki.pl/articles/106826.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
Argentinian islands
glacier
terrestrial laser scanning
digital stereo photogrammetric survey
penola strain tectonic fault
GNSS observations
geodynamic polygon
wyspy argentyńskie
lodowiec
skanowanie laserowe naziemne
badanie fotogrametryczne
uskok tektoniczny
obserwacje GNSS
poligon geodynamiczny
Opis:
In this paper is given an information about complex geodetic research in Ukrainian Antarctic station “Academician Vernadsky”. Research were carried by Lviv polytechnic scientists, during Antarctic expeditions in years 2002 - 2005, 2013, 2014. Main objectives of the studies were: (a) study of the islands glaciers surface volumes changes in Antarctic archipelago and Antarctic Peninsula using terestrial laser scaning and digital terrestrial stereophotogrammetry survey; (b) investigation of Penola strain tectonic fault, using the results of precise GNSS observations.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 100; 149-163
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating the accuracy of determining coordinates of a corner of a building measured in the RTN GNSS mode, having applied the innovative algorithm of vector translation
Autorzy:
Krzyżek, R.
Powiązania:
https://bibliotekanauki.pl/articles/106775.pdf
Data publikacji:
2017
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
RTN GNSS
vector translation
measurement of building structures
innovative algorithm
translacja wektorów
pomiar konstrukcji budowlanych
algorytmy
Opis:
The study evaluates the accuracy of determining coordinates of a corner of a building measured in the RTN GNSS mode (Real Time Network Global Navigation Satellite System) using the method of line-line intersection and having applied the algorithm of vector translation, developed by the author. The performed analysis of accuracy proved a high precision in determining the points subjected to studies. An important factor in the formation of a mean error regarding the position of the corner of a building, having used the algorithm of vector translation, is the assumption of correctness of the reference points, i.e. the so-called base points, determined in the RTN GNSS mode. In this case, the base points take the role of measurement control points. The mean error of the position of the corner of a building, taking into account the innovative solution, is at the level of several centimeters. The study results presented in the article allow to positively evaluate the algorithm of vector translation in terms of accuracy of determining the position of a corner of a building, measured in real time.
Źródło:
Reports on Geodesy and Geoinformatics; 2017, 103; 10-21
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of satellite techniques in the air transport
Autorzy:
Fellner, A.
Jafernik, H.
Powiązania:
https://bibliotekanauki.pl/articles/106727.pdf
Data publikacji:
2016
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
aviation
air transport
satellite systems
satellite techniques
PBN
GNSS
SHERPA
HEDGE
lotnictwo
transport lotniczy
systemy satelitarne
techniki satelitarne
Opis:
The article shows process of the implementation satellite systems in Polish aviation which contributed to accomplishment Performance-Based Navigation (PBN) concept. Since 1991 authors have introduced Satellite Navigation Equipment in Polish Air Forces. The studies and researches provide to the Polish Air Force alternative approaches, modernize their navigation and landing systems and achieve compatibility with systems of the North Atlantic Treaty Organization (NATO) and International Civil Aviation Organization (ICAO). Acquired experience, conducted military tests and obtained results enabled to take up work scientifically - research in the environment of the civil aviation. Therefore in 2008 there has been launched cooperation with Polish Air Navigation Services Agency (PANSA). Thanks to cooperation, there have been compiled and fulfilled three fundamental international projects: EGNOS APV MIELEC (EGNOS Introduction in European Eastern Region - APV Mielec), HEDGE (Helicopters Deploy GNSS in Europe), SHERPA (Support ad-Hoc to Eastern Region Pre-operational in GNSS). The successful completion of these projects enabled implementation 21 procedures of the RNAV GNSS final approach at Polish airports, contributing to the implementation of PBN in Poland as well as ICAO resolution A37-11. Results of conducted research which served for the implementation of satellite techniques in the air transport constitute the meaning of this material.
Źródło:
Reports on Geodesy and Geoinformatics; 2016, 100; 39-53
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
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