Andrzej Araszkiewicz

Andrzej Araszkiewicz
Military University of Technology | WAT · Faculty of Civil Engineering and Geodesy

PhD Eng.

About

54
Publications
9,498
Reads
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196
Citations
Additional affiliations
February 2015 - present
Military University of Technology
Position
  • Professor (Assistant)
February 2009 - February 2015
Military University of Technology
Position
  • Research Assistant

Publications

Publications (54)
Article
Full-text available
Monitoring of permanent stations that make up the reference frame is an integral part of the geodesists work. Selection of reference stations is based on analysis of parameters characterizing them (hardware, coordinates’ stability, mounting, location). In this paper, we took into account phase residual as an indicator of unmodelled signal. Phase re...
Conference Paper
Full-text available
Observations from navigation satellite systems (mainly GPS) from many years are used for the Earth’s crust movement and deformation monitoring. Today we have a possibility to detect the smallest displacement (at mm level) and thanks to greater density of the networks in recent years accurate deformation rate field can be provided. In Central Europe...
Conference Paper
The main goal of presented research was to determine whether the changes of GPS baselines allow for precise and reliable deformation rates designation. The basic task was to determine the optimal method for the GPS data processing, so as to obtained baselines were minimally affected by systematic errors. The study was carried out based on GPS data...
Conference Paper
Full-text available
In this research we aimed to check if the GPS observations can be used for calculation of a reliable deformation pattern of the intracontinental lithosphere in seismically inactive areas, such as territory of Poland. For this purpose we have used data mainly from the ASG-EUPOS permanent network and the solutions developed by the MUT CAG team (Milit...
Article
Full-text available
This research presents the analysis of using different weighting functions for the GPS and Galileo observations in Precise Point Positioning (PPP) performance for globally located stations for one week in 2021. Eight different weighting functions of observations dependent on the elevation angle have been selected. It was shown that the use of diffe...
Article
Full-text available
The aim of this paper is to present the results of theWeather Research and Forecasting (WRF) model of solar radiation for moderate climatic zones. This analysis covered the area of northeastern Germany. Due to very unfavorable solar energy conditions in this region for at least 1/3 of the year, we decided to select the dates with the most represent...
Article
In our study we examined the possibility of using strain rate data, determined from geodetic satellite measurements for estimations of magnitude of contemporary stress in a relatively stable area of northern Poland, comprised of fragments of the East European Craton, the Teisseyre-Tornquist Tectonic Zone and the Palaeozoic Platform. The strain rate...
Article
Full-text available
An increase in temperature causes higher evaporation of water from water bodies; consequently, the water content in the atmosphere also increases. The precipitable water (PW), as the water content in the atmospheric air column, is therefore an important parameter to consider when studying climate change. The aim of this study was to analyse multi-a...
Article
Full-text available
Among numerous publications about the SARS-CoV-2, many articles present research from the geographic point of view. The cartographic research method used in this area of science can be successfully applied to analyze the spatiotemporal characteristics of the pandemic using limited data and can be useful for a quick and preliminary assessment of the...
Article
Full-text available
Knowledge of Global Navigation Satellite System (GNSS) antenna phase center variations plays a key role in precise positioning. Proper modeling is achieved by accessing antenna phase center corrections, which are determined in the calibration process. For most receiver antenna types, the International GNSS Service provides such corrections for two...
Article
Full-text available
In this study, we compared two sets of antenna phase center corrections for groups of the same type of antenna mounted at the continuously operating global navigation satellite system (GNSS) reference stations. The first set involved type mean models provided by the International GNSS Service (release igs08), while the second set involved individua...
Article
Full-text available
The aim of the paper is to present the structure and research potential of the newly created measurement and information system for observing dynamic phenomena occurring in the Earth's crust of the Upper Silesian Coal Basin (USCB) in Poland as a result of mining activities. The structure of system is similar to the one developed for monitoring the...
Poster
Full-text available
Poster presents the results of analyses in three aspects: overall differences between GPS and GAL solutions; problem with ground antenna phase center modelling in case of GAL solutions and finally the impact of Galileo observation to combined solution.
Poster
Full-text available
Our analysis cover all stations provided at least both GPS and Galileo data in 2018. During this period the number of EPN stations providing Rinex 3 data with Galileo observations increased from 136 at beginning of year to 181 at end of year. We divide entire network to subnetworks, excactly the same for GPS and Galileo solutions. Then we generate...
Article
Full-text available
Advanced processing of collected global navigation satellite systems (GNSS) observations allows for the estimation of zenith tropospheric delay (ZTD), which in turn can be converted to the integrated water vapour (IWV). The proper estimation of GNSS IWV can be affected by the adopted GNSS processing strategy. To verify which of its elements cause d...
Presentation
Full-text available
The project EPOS - European Plate Observing System for Poland (EPOS-PL) was launched in January 2017 with a main objective of observing surface land deformations and seismicity affecting inhabitants, environment, infrastructure and buildings in the region of Upper Silesia, south Poland, where intensive activities related to coal exploitation take p...
Article
Full-text available
The present availability of 18+ years of GNSS data belonging to the EUREF Permanent Network (EPN, http://www.epncb.oma.be/) is a valuable database for the development of a climate data record of GNSS tropospheric products over Europe. This data record can be used as a reference for a variety of scientific applications (e.g. validation of regional n...
Article
Full-text available
Precise positioning using the signals of the Global Position System requires correcting the distance between the points of reception of the signal carrier phase and the antenna reference point. Sophisticated models to account for these phase errors are available and widely in use. These models are usually based on calibrations of several antennas o...
Article
Full-text available
The present availability of 18+ years of GNSS data belonging to the EUREF Permanent Network (EPN, http://www.epncb.oma.be/) is a valuable database for the development of a climate data record of GNSS tropospheric products over Europe. This data record can be used as a reference for a variety of scientific applications and has a high potential for m...
Article
Full-text available
The paper concerns investigation of the credibility of tectonic interpretation of GNSS strain rates. The analysis was focused on stable regions, where the crustal deformations are small and the reliability of GNSS velocities is questionable. We are showing how the unreliable motion of stations affects calculated strains around them. We expressed di...
Article
Full-text available
The main purpose of this research was to acquire information about consistency of ZTD (zenith total delay) linear trends and seasonal components between two consecutive GPS reprocessing campaigns. The analysis concerned two sets of the ZTD time series which were estimated during EUREF (Reference Frame Sub-Commission for Europe) EPN (Permanent Netwo...
Article
Full-text available
The main purpose of this research was to acquire information about consistency of the ZTD (Zenith Tropospheric Delay) linear trends and seasonal components between two consecutive GPS reprocessing campaigns. The analysis concerned two sets of the ZTD time series which were estimated during EPN (EUREF Permanent Network) reprocessing campaigns accord...
Book
Full-text available
Celem realizacji badań opisanych w ramach niniejszej monografii było opracowanie modelu współczesnych deformacji powierzchni litosfery na obszarze Europy Środkowej i Polski na podstawie sieci permanentnych stacji geodezyjnych ASG-EUPOS i EPN (EUREF Permanent Network), analiza pod kątem ich przydatności do badań dynamiki powierzchni Ziemi, jak równi...
Conference Paper
Full-text available
Nowadays there are almost 400 GNSS reference stations in Poland. They belong to 4 nationwide networks-ASG-EUPOS managed by Polish Head Office of Geodesy and Cartography and three managed by private companies. On one hand these networks support the maintenance of ETRF2000 in Poland and on other hand their independent solutions improve the reliabilit...
Conference Paper
Full-text available
The most significant errors on GPS measurements are directly related to the environment in which the signal is propagated – the atmosphere. Disturbances in the ionosphere, which is its upper layer, have significant effects on satellite signal in communication and navigation systems. Ionized gases in the ionosphere, caused by ultraviolet radiation a...
Conference Paper
Full-text available
The potential that lies in the use of GNSS measurements for crustal deformation studies have already noticed in the beginning of the first of such a system(GPS).Today thanks to the development of satellite positioning techniques it is possible to detect displacement on the Earth surface with an accuracy less than 1cm.Withlong-term observations we ca...
Conference Paper
Full-text available
The stochastic part (noises) of the GPS-derived time series has a direct impact on the uncertainties of the linear parameters estimated from this data. The noises are commonly analysed with the Maximum Likelihood Estimation (MLE) that is stated as being the most precise method for this purpose. Furthermore it is a very powerful method for different...
Conference Paper
Full-text available
The velocities derived from permanent GNSS stations play more and more significant role nowadays. Therefore their reliable estimation becomes crucial. These velocities and their uncertainties are involved in the kinematic reference frames determination and numerous analyses and interpretations in the geodynamic studies. They are commonly determined...
Conference Paper
Full-text available
The GPS time series autocorrelations are the commonly known phenomena nowadays. Such autocorrelations can be identified both in the deterministic and stochastic part of the data. Their existence in the deterministic part of GPS time series has the form of trend (interpreted as station’s velocity) and seasonal components (annual and semiannual). The...
Article
Full-text available
Streszczenie W przeszłości współrzędne punktów osnowy geodezyjnej wyznaczane były raz i traktowane jako wartości stałe, niezmienne. Osnowa realizowana za pomocą stacji permanentnych GNSS pozwala na wyznaczanie i aktualizację współrzędnych na podstawie ciągle gromadzonych obserwacji. Współrzędne te mogą być wyznaczane z różną rozdzielczością czasową...
Article
The ITRF is determined on the basis of long-term observations by the following four techniques: GNSS, SLR, DORIS and VLBI. Analysis of the data delivered by different techniques provides a stable reference frame. Improvement of further ITRS realizations requires the advancement in the geometry of co-location network and the increase of agreement be...
Article
This poster presents analysis of changes in GPS baseline length from the EPN network. For the study the observation from over 280 stations from years 1996-2010 were used. Data was processed in GAMIT software (version 10.4). The GPS network was tessellated into individual triangles based on Delaunay triangulation. Nearly 600 baselines were received....
Article
Full-text available
From a geological point of view, the area of Central Europe is very complex. At the same time Europe is being affected by the forces associated with tectonic Africa, as well as Atlantic (ridge) push. In our study the general strain pattern of Central Europe was determined from two different approaches. The first one was finite element approach (FEM...
Article
Up-to-date investigations concerning space geodesy are mostly aimed at data of various techniques joint processing. The poster presents solutions (North, East, Up components) of selected stations (McDonald, Yarragadee, Greenbelt, Monument Peak, Zimmerwald, Borowiec, Mt.Stromlo-Orroral, Potsdam, Graz, Herstmonceux and Wettzell), which adopted Satell...
Article
Full-text available
The paper presents current activities of the Centre of Applied Geomatics (CAG), Warsaw Military University of Technology in the frame of EPN (EUREF Permanent Network). The Centre is the research unit, which operates within Military University of Technology. The main field of interests of its members covers GNSS (Global Navigation Satellite Systems)...
Article
Full-text available
This paper presents the results of the frequency and time-frequency analyses of the coordinates of permanent GPS sites obtained from short-time solutions. The aim was to estimate the usefulness of GPS observations for the short-period geodynamical studies, and check how tidal models in Bernese fit to individual sites conditions. This study shows th...
Article
Full-text available
The poster presents preliminary results from numerical analyses of combining EPN GNSS solutions received from Bernese software and GAMIT/GLOBK. In the paper the authors adopt the results from testing the homogeneous computation procedures, the ones used for EPN reprocessing. Daily and weekly solutions were combined by the ADDNEQ2 and GLOBK software...
Article
Full-text available
The paper summarizes CAG's (Centre of Applied Geomatics) involvement in EUREF project. CAG is the newest, seventeenth LAC (Local Analysis Centre), which was established at the end of 2009. The main task is to process data from the network consisting of 114 stations with weekly ellipsoidal coordinates as the result. CAG also participates in EPN Repr...
Article
Full-text available
This paper presents adjustment's results of the Polish Active Geodetic Network (ASG-EUPOS). ASG-EUPOS is the multifunctional precise satellite positioning system established by the Head Office of Geodesy and Cartography in 2008. It consists of 84 Polish sites with GPS module, 14 Polish sites with GPS/GLONASS module and 20 foreign sites. The adjuste...
Article
Full-text available
The paper presents the results of research related to the application of GNSS solutions in short observational periods in geodynamical investigations. Authors used the 3-hour solution appointed from hour-long interval of about 30 chosen stations on mountainous terrains from over 100 which were worked out. The main aim was to check the correctness o...
Article
Full-text available
This paper presents analyses on the GPS coordinates from sub-diurnal solutions of EPN data provided by Warsaw Military University of Technology. The aim of this research is to investigate the way the tidal models used in Bernese software (solid Earth and ocean tides as well) fit to the individual conditions of EPN stations. The 1-hour solution tech...

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Projects

Projects (4)
Project
Research on the accuracy, convergence time, and compatibility of the Precise Point Positioning (PPP) method using GPS + Galileo constellation.
Project
The goal of this project is to developed the research infrastructure EPOS-PL, where the observation data of the Polish part of European plate from dispersed measurement networks will collected. Then, these data are developed, standardized and integrated in the form of databases with metadata, access to which is provided through the web site with the appropriate analytical services / applications and dedicated visualizations. EPOS-PL engages scientists and industrial experts from many fields: geophysics and seismology, geodesy, mining, geology, geomagnetism, and gravity with a common goal of providing comprehensive and complementary information on the measured results. The consortium members of EPOS-PL:  Institute of Geophysics Polish Academy of Sciences, Warszawa, Poland - Beneficiary  Central Mining Institute, plac Gwarków 1, Katowice, Poland  Wroclaw University of Environmental and Life Sciences, Institute of Geodesy and Geoinformatics, Wrocław, Poland  Institute of Geodesy and Cartography, Warszawa, Poland  Military University of Technology in Warsaw, Warszawa, Poland  Polska Grupa Górnicza (PGG Company), Katowice, Poland The Central Mining Institute (GIG) is involved primarily in the implementation of task no. 9 - "MUSE - a Multidisciplinary Upper Silesian Episode". GIG is responsible for the implementation of this task and together with the project partners it is building infrastructure to monitor the geodynamics of the Upper Silesian Coal Basin, in which intensive operations related to coal mining are carried out.
Project
The EUREF Permanent GNSS Network consists of a network of continuously operating GNSS (Global Navigation Satellite Systems, such as GPS, GLONASS, Galileo, Beidou, ...) reference stations, data centres providing access to the station data, analysis centres that routinely analyze the GNSS data, product centres or coordinators that generate the EPN products, and a Central Bureau that is responsible for the daily monitoring and management of the EPN. The network is operated under the umbrella of the IAG (International Association of Geodesy) Regional Reference Frame sub-commission for Europe, EUREF. All contributions to the EPN are provided on a voluntary basis, with more than 100 European agencies/universities involved. The EPN operates under well-defined international standards and guidelines which are subscribed by its contributors. These guidelines guarantee the long-term quality of the EPN products. The primary purpose of the EPN is to provide access to the European Terrestrial Reference System 89 (ETRS89) which is the standard precise GNSS coordinate system throughout Europe. Supported by EuroGeographics and endorsed by the INSPIRE Directive 2007/2/EC, the ETRS89 forms the backbone for geolocation data on the European territory, both on a national as on an international level. The EPN provides access to the ETRS89 by making publicly available for the GNSS tracking data as well as precise positions, velocities and tropospheric parameters of all EPN stations. Based on these products, the EPN contributes also to monitoring of tectonic deformations in Europe, and supports long-term climate monitoring, numerical weather prediction and the monitoring of sea-level variations. More info http://www.epncb.oma.be/