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1

Studying the Sensitivity of Satellite Altimetry, Tide Gauge and GNSS Observations to Changes in Vertical Displacements

Pająk Katarzyna, Kowalczyk Kamil, Kaminskis Jānis, Idzikowska Magdalena

Geomatics and Environmental Engineering

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2021

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Vol. 15, no. 4

45--58

EN

Tide gauge observations provide sea level relative to the Earth’s crust, while satellite altimetry measures sea level variations relative to the centre of the Earth’s mass. Local vertical land motion can be a significant contribution to the measured sea level change. Satellite altimetry was traditionally used to study the open ocean, but this technology is now being used over inland seas too. The difference of both observations can be used to estimate vertical crustal movement velocities along the sea coast. In this paper, vertical crustal movement velocities were investigated at tide gauge sites along the Adriatic Sea coast by analyzing differences between Tide Gauge (TG) and Satellite Altimetry (SA) observations. Furthermore, the estimated vertical motion rates were compared with those from nearby GNSS measurements. The study determines the practical relationships between these vertical crustal movements and those determined from unrelated data acquired from the neighbouring GNSS stations. The results show general consistence with the present geodynamics in the Adriatic Sea coastal zone.

2

First results of time series analysis of the permanent GNSS observations at Polish EPN stations using GipsyX software

Łyszkowicz Adam, Pelc-Mieczkowska Renata, Bernatowicz Anna, Savchuk Stepan

Artificial Satellites : Journal of Planetary Geodesy

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2021

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Vol. 56, No. 3

101--118

EN

The aim of this work is to explore, for the first time in Poland, the possibility of determining Earth’s crust movements from permanent observations at selected permanent stations using the GipsyX software for a period of 8 years (2011-2018) in the ITRF2014 reference frame. The data used in this work are from 15 Aktywna Sieć Geodezyjna (ASG)-EUPOS stations from 2011 to 2018, which are also European Permanent Network (EPN) stations. The stations Borowa Góra, Borowiec, Józefosław, Lamkówko, and Wroclaw are also International Global Navigation Satellite Systems (GNSS) Service (IGS) stations. Daily data, rinex files, for these stations have been made available for this work by the Main Office of Surveying and Cartography. The calculations were made using the GipsyX software in the ITRF14 reference frame. The tests performed have shown that daily solutions from 8-yearlong time series give secular trends with an accuracy of 0.01 mm/yr. Our results suggest that there are small differences in horizontal and vertical velocities and in the accuracy estimated between our and EPN solutions. At some stations, for example, Łódź, the differences are much larger. The impact of additional GNSS observations on the accuracy of determination of horizontal and vertical movements of the Earth's crust shows a submillimeter accuracy in computed coordinates of stations even at a relatively small time interval. It means that multiGNSS Precise Point Positioning (PPP) processing can be used in the future for the estimation of geodynamic processes.

3

Testing the relationship between vertical crustal movement and geoid uplift for the Sudetes area

Kowalczyk K., Kuczynska-Siehien J.

Annales Societatis Geologorum Poloniae

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2018

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Vol. 88, No. 1

47--57

EN

The aim of this study was to examine the relationship between vertical movements of the Earth’s crust and variation in geoid height. Data from the Gravity Recovery and Climate Experiment (GRACE), precise levelling, tidal gauge observations and Global Navigation Satellite Systems (GNSS) stations for the Sudetes area were used. The GRACE data provided the possibility of the analysis of geopotential changes. The geoid heights were calculated for the period from April 2002 to March 2016, using data from GeoForschungsZentrum (GFZ) GRACE Level-2 Product Release 05 in the form of spherical harmonic coefficients, truncated at degree and order (d/o) 60. Different filters were used. The calculated geoid change over time has the approximate value of 0.16 mm/y. This value was compared to the expected change in geoid height, determined on the basis of the Earth’s crustal movements.

4

Adjustment of vertical crustal movement network on the basis of last three leveling campaigns in Poland

Kowalczyk K., Rapinski J.

Reports on Geodesy

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2012

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z. 1/92

123--134

EN

On the base of leveling data, three maps of vertical crustal movements were developed (Wyrzykowski, 1971; Wyrzykowski, 1985a; Kowalczyk, 2006a). Also two maps of vertical crustal movements were created (Wyrzykowski 1990, Kowalczyk, Rapiński 2011). In the above mentioned elaborations, the vertical crustal movements were calculated from two subsequent first order leveling campaigns. To include more data, results of all four leveling campaigns in Poland were accumulated and digitalized. One, unified database was developed on the basis of collected and unified data set of unadjusted observations (Kowalczyk, Bednarczyk, 2009; Kowalczyk, Bednarczyk, Kowalczyk, 2011). First trials of common use of three first order leveling campaigns were performed in 2008 (Kowalczyk, 2008). Though the available leveling data was not complete. The goal of this paper is to describe a trial of common adjustment of relative vertical crustal movements on the basis of three first order leveling campaigns in Poland.

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New Elaboration of Gradient Map of Vertical Crustal Movements in the Territory of Poland

Kowalczyk K., Rapiński J.

Technical Sciences / University of Warmia and Mazury in Olsztyn

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2011

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nr 14(2)

245-254

EN

The goal of this elaboration was to elaborate the map of vertical crustal movements gradients in the territory of Poland. This paper describes general characteristic of leveling data from last two leveling campaigns as well as the method of evaluation. Earlier gradient map from 1990 is also discussed. The map of gradients with an accuracy estimate is a result of this work.

PL

Celem pracy było opracowanie map gradientów prędkości pionowych ruchów powierzchni skorupy ziemskiej na obszarze Polski. W artykule przedstawiono ogólną charakterystykę materiału niwelacyjnego z ostatnich dwóch kampanii niwelacji precyzyjnej oraz sposób opracowania map gradientów. Odniesiono się także do wcześniej opracowanej mapy gradientów z roku 1990. Efektem jest mapa gradnientów wraz z oceną błędów średnich ich wyznaczenia.