Wyniki wyszukiwania - BazTech

1

Pomiary kwantowe A.D. 2023

Demkowicz-Dobrzański Rafał

Postępy Fizyki

|

2023

|

T. 74, z. 2

13--18

PL

W artykule przedstawiono współczesne spojrzenie na zagadnienie pomiarów kwantowych z punktu widzenia kwantowej teorii estymacji oraz najnowsze osiągnięcia teoretyczne i doświadczalne w dziedzinie metrologii kwantowej, ze szczególnym podkreśleniem wkładu grupy badawczej z Uniwersytetu Warszawskiego w rozwój metod teoretycznych.

EN

In the article a quantum estimation theory perspective on the concept of quantum measurement is presented, as well as the latest theoretical and experimental developments in the field of quantum metrology, with particular focus on the contribution of a research group from the University of Warsaw to the development of theoretical methods.

2

Kwantowe splątanie ⋆ nierówności Bella ⋆ teoretyczne podstawy obserwacji interferencji wielofotonowej ⋆ narodziny technologii kwantowych

Żukowski Marek

Postępy Fizyki

|

2023

|

T. 74, z. 2

3--12

PL

W artykule przedstawiam za co i dlaczego John F. Clauser, Alain Aspect i Anton Zeilinger otrzymali Nagrodę Nobla 2022 (równo 100 lat po wręczeniu tejże nagrody Einsteinowi i Bohrowi), a także koncentruję się nad istotą prowadzonych przeze mnie badań, które wiążą się ze wspomnianą nagrodą. Tekst jest napisany dwutorowo. Czytelnik, szacując swój poziom wiedzy z fizyki kwantowej, może go czytać przeskakując pomiędzy tekstem głównym, a fragmentami z kropką (●) głębiej wyjaśniającymi pewne aspekty, ale można też przeczytać tylko tekst główny. Jako autor wolałbym, aby artykuł zainteresował nauczycieli i studentów, a może nawet licealistów, niż profesorów doktorów habilitowanych, choć i ci nie omijając fragmentów z kropką, mam nadzieję, mogą się czegoś ciekawego dowiedzieć.

EN

In the paper I describe why and for what achievements John F. Clauser, Alain Aspect and Anton Zeilinger received the Nobel Prize in 2022 (exactly 100 years after the prize had been awarded to Einstein and Bohr), as well as my own research related to the prize. The text is written in a twofold way. Based on familiarity with quantum physics the reader can switch between the main narrative and the parts marked with bullets (•) explaining some aspects in more detail, but one can restrict attention to the main text only. As the author, I would prefer that the paper be of interest to teachers, students, and possibly also high-school students rather than professors, although even they can learn something interesting, also from the parts marked with a bullet.

3

SAR interferometry for landslide investigation and surface deformation monitoring: a case study of Souk Ahras area, north-east of Algeria

Gueraidia Nour El Houda, Fehdi Chemseddine, Gueraidia Saida

Geomatics, Landmanagement and Landscape

|

2023

|

no. 2

37--55

EN

Landslides – natural disasters be caused by various factors - are frequent in the region surrounding Souk Ahras. Comprehensive fieldwork, such as geotechnical drilling investigations and soil excavations, is conducted to monitor ground movements and assess the feasibility of geological locations. Synthetic Aperture Radar (SAR) and other active satellite remote sensors are utilized in Earth Observation-based systems to identify and track ground deformation and landslides in the study area. This research aims to illustrate how open-source processing software, SNAP, provided by the European Space Agency, can be combined with freely available datasets from Copernicus to accomplish this goal. In the North Eastern part of Algeria, which includes Souk Ahras, there is a high risk of landslides Through the use of InSAR technology, the research provided satisfactory results in identifying the morphology of landslides and generating a largescale interferometric map covering several regions in the East of Algeria, revealing the extent of distortion and spacing caused by the landslide phenomenon.

4

Coda wave interferometry for monitoring the fracture process of concrete beams under bending test

Knak Magdalena, Wojtczak Erwin, Rucka Magdalena

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2023

|

Vol. 71, nr 3

art. no. e144118

EN

Early detection of damage is necessary for the safe and reliable use of civil engineering structures made of concrete. Recently, the identification of micro-cracks in concrete has become an area of growing interest, especially when it comes to using wave-based techniques. In this paper, a non-destructive testing approach for the characterization of the fracture process was presented. Experimental tests were performed on concrete beams subjected to mechanical degradation in a 3-point bending test. Ultrasonic waves were registered on a specimen surface by piezoelectric transducers located at several points. Then, the signals were processed taking advantage of wave scattering due to micro-crack disturbances. For early-stage damage detection, coda wave interferometry was used. The novelty of the work concerns the application of the complex decorrelation matrix and the moving reference trace approach for better distinguishment of sensors located in different parts of a crack zone. To enhance coda wave-based damage identification results, optical imaging of crack development was performed by means of digital image correlation measurement. The results obtained showed that the coda wave interferometry technique can be successfully used as a quantitative measure of changes in the structure of concrete. The results also indicated that the course of decorrelation coefficient curves enabled the identification of three stages during degradation, and it depended on the location of acquisition points versus the crack zone.

5

Monitoring of millimeter-scale deformations in Tallinn using repeated leveling and PS-InSAR analysis of Sentinel-1 data

Oja Tõnis, Gruno Anti

Advances in Geodesy and Geoinformation

|

2023

|

Vol. 72, no. 1

art. no. e33, 2023

EN

The aim of this study was to evaluate millimeter-scale deformations in Tallinn, the capital of Estonia, by using repeated leveling data and the synthetic aperture radar (SAR) images of Sentinel-1 satellite mission. The persistent scattered interferometric SAR (PS-InSAR) analysis of images from ascending and descending orbits from June 2016 to November 2021 resulted the line-of-sight (LOS) displacement velocities in the Tallinn city center. Velocity solutions were estimated for the full period of time, but also for shorter periods to monitor deformation changes in yearly basis. The gridded LOS velocity models were used for the decomposition of east-west and vertical velocities. Additionally, the uncertainty of 2D velocity solutions was estimated by following the propagation of uncertainty. The 3D velocity of permanent GNSS station “MUS2” in Tallinn was used to unify the reference of all PS-InSAR velocity solutions. The results of the latest leveling in Tallinn city center in 2007/2008 and 2019 showed rather small subsidence rates which were in agreement with InSAR long-termsolution. However, the short-termInSAR velocity solutions revealed larger subsidence of city center with a rate about –10 mm/yr in 2016–2017, and the uplift around 5 mm/yr in 2018–2019 with relatively stable periods in 2017–2018 and 2019–2021. The inclusion of groundwater level observation data and the geological mapping information into the analysis revealed possible spatiotemporal correlation between the InSAR results and the groundwater level variations over the deep valleys buried under quaternary sediments.

6

Zagrożenia geologiczne w Polsce w 2021 roku

Wojciechowski Tomasz, Laskowicz Izabela, Kos Jarosław, Marciniec Paweł, Uścinowicz Grzegorz, Przyłucka Maria, Wódka Marcin

Przegląd Geologiczny

|

2022

|

Vol. 70, nr 9

617--626

EN

Geological hazards caused by landslides, earthquakes, erosion, land surface deformation and collapse in 2021 in Poland were among the average compared to recent years. They did, however, affect material losses. The Polish Geological Survey (PGS) recorded 41 events related to sudden landslide activations, which damaged or destroyed 17 road sections. Through ongoing monitoring of 72 landslides, 33 were shown to be active. In 2021, more than 5,200 landslides were identified and inventoried in Poland. Geodynamic monitoring performed by PGS recorded 611 seismic events in Poland, whose magnitudes reached M4.2. In addition, using satellite radar interferometry, continuation of land surface deformations was found mainly in mining areas. In 2021, there was a number of collapses of various origins. The paper is a brief report on the ongoing tasks of the Polish Geological Survey in the field of geological hazards and presents events that took place in Poland in 2021.

7

Monitoring dynamiki ruchów powierzchni osuwisk w warunkach zmiennego poziomu wód gruntowych z wykorzystaniem reflektorów radarowych

Perski Zbigniew, Wojciechowski Tomasz

Przegląd Geologiczny

|

2022

|

Vol. 70, nr 9

661--670

EN

The main objective of the presented analysis was to investigate to what extent even minor changes in the hydrological and hydrogeological environment affect the changes in the dynamics of landslide surface displacement. The research was carried out for selected monitored landslides, which, in addition to the in-depth monitoring devices, were equipped with corner reflectors suitable for satellite radar interferometry measurements. The high temporal resolution of the interferometric data allowed demonstrating the existence of a relationship between the speed of surface movements and slight changes in the depth to the groundwater table. The analyses were performed for five landslides, which also showed a high dependence of these compounds on the geological structure of the landslide and its substrate.

8

Design of radio receiver for lightning interferometry

Al-Taweel Malik Hasan, Ibrahim Ayman Mohammed, Ahmad Mohd Riduan, Ahmad Badrul Hisham, Al-Shaikhli Taha Raad, Al-Saeedi Mustafa Murtdha

Przegląd Elektrotechniczny

|

2022

|

R. 98, nr 2

211--214

EN

The design of wideband receiver for the application of lightning remote sensing in the VHF band is proposed. Recently, the VHF emissions has been detected from the lightning therefore, various studies motivated on designing sensing systems to detect and analyse the radiation signals from lightning. Previous studies were done by using commercial low noise amplifier and band pass filter which its expensive, low in accuracy and signal’s magnitude. So, in order to detect the VHF emissions with better magnitude we required to design highly efficient low noise amplifier with paying attention to some specifications such as gain, noise figure, linearity of the LNA and the flatness of the band pass filter. The receiver designed for the lightning interferometer as lightning remote sensing therefore we used this technique in communication to apply in lightning. This article presents the design of high gain low noise amplifier supporting wide range of frequency from 10 MHz to 500 MHz and wide bandwidth band pass filter from 110 MHz to 400 MHz. The design is simulated by using Advance Design System (ADS) software simulator and then measured and fabricated by using FR-4 substrate. The measurement is highly satisfying to the simulation results at the (S21) gain around 20 dB at 255MHz Centre frequency and return loss (S11) around -31.204 dB at 255 MHz while the noise figure around 0.063. The designed system achieved excessive efficiency and used for lightning interferometer system.

PL

Zaproponowano projekt odbiornika szerokopasmowego do zastosowania teledetekcji wyładowań atmosferycznych w paśmie VHF. Ostatnio wykryto emisje VHF z piorunów, dlatego różne badania były motywowane do zaprojektowania systemów czujnikowych do wykrywania i analizowania sygnałów promieniowania z piorunów. Wcześniejsze badania zostały wykonane przy użyciu komercyjnego wzmacniacza niskoszumowego i filtra pasmowoprzepustowego, który jest drogi, ma niską dokładność i wielkość sygnału. Tak więc, aby lepiej wykrywać emisje VHF, musieliśmy zaprojektować wysoce wydajny wzmacniacz niskoszumowy, zwracając uwagę na pewne specyfikacje, takie jak wzmocnienie, współczynnik szumów, liniowość LNA i płaskość filtra pasmowego. Odbiornik zaprojektowany dla interferometru piorunowego jako teledetekcja wyładowań atmosferycznych, dlatego zastosowaliśmy tę technikę w komunikacji do zastosowania w piorunach. W artykule przedstawiono konstrukcję niskoszumowego wzmacniacza o wysokim wzmocnieniu, obsługującego szeroki zakres częstotliwości od 10 MHz do 500 MHz oraz filtr szerokopasmowy od 110 MHz do 400 MHz. Projekt jest symulowany przy użyciu symulatora oprogramowania Advance Design System (ADS), a następnie mierzony i wytwarzany przy użyciu podłoża FR-4. Pomiar jest wysoce satysfakcjonujący dla wyników symulacji przy wzmocnieniu (S21) około 20 dB przy 255 MHz częstotliwości środkowej i tłumieniu odbiciowym (S11) około -31,204 dB przy 255 MHz, podczas gdy współczynnik szumów około 0,063. Zaprojektowany system osiągnął nadmierną wydajność i został wykorzystany w systemie interferometru piorunowego.

9

Use of InSAR in Linear Discontinuous Ground Deformation Generation analysis: case study of a mine in Poland

Apanowicz Bartosz

Journal of Sustainable Mining

|

2022

|

Vol. 21, iss. 1

45--53

EN

Linear Discontinuous Ground Deformations are defined as fissures and steps, as well as structural forms composed of them. They occur on the surface as a result of underground mining. Knowledge of LDGDs has been acquired through field observations which are subsequently described in the scientific publication. Records of LDGDs are made by using the classic surveying method. The paper reviews the created LDGDs in the years 2015-2019 in one of the mines of the USCB. The analysis covers the velocity of subsidence as a result of underground mining and the values of horizontal strains determined according to the Knothe-Budryk theory. The InSAR satellite technique was used to measure the subsidence. The subsidence was determined using the small baseline method - SBAS. The combination of the theoretical Knothe-Budryk model with the large-scale capabilities of InSAR may provide valuable material for a better understanding of the genesis of LDGD creation and their prediction.

10

Qualitative relationship of seismic activity with vertical displacements of terrain after mine closure with the use of DInSAR technology

Sopata Paweł, Sokoła-Szewioła Violetta

Geoinformatica Polonica

|

2022

|

T. 21

83--93

EN

The liquidation process of mines is very complex and long. It relates to various hazards, including post-mining seismicity and deformations of ground surface. The above issues are the subject of the research project under which the monitoring of ground surface movements is carried out in the area of the closed coal mine “Kazimierz-Juliusz”, which is currently being flooded. The monitoring is carried out using the GNSS technique and satellite radar interferometry (InSAR). The project makes use of radar data from the Copernicus project, which is being implemented by the European Commission in cooperation with the European Space Agency (ESA). InSAR monitoring started in December 2020. Additionally, we analyzed the impact on ground surface of 5 rock tremors of the energy not exceeding 6.5E + 05 J (tremor magnitude Mw = 2.1), which were reported in the investigated area in 2018–2020. The article presents the results of qualitative analysis involving the relationship between seismic activity and vertical movements of ground surface. To investigate potential changes in altitude, DInSAR technology was applied. On the basis of interferometric images generated from radarograms in the periods before and after the tremor, in January 2019, it was found that vertical movements of ground surface were possible to occur. Altitude changes can be characterized with the values in the range of single millimeters, which are only slightly beyond the accuracy range of the InSAR method. The analysis of interferograms, comprising wider time databases, indicated that the impact of the tremor on the deformations of ground surface is incidental.

PL

Proces likwidacji kopalń jest bardzo złożony i długotrwały. Towarzyszą mu różne zagrożenia, wśród których można wymienić sejsmiczność pogórniczą oraz deformacje powierzchni terenu. Problematyka ta jest przedmiotem projektu badawczego, w ramach którego wykonywany jest monitoring ruchów powierzchni na terenie nieczynnej już kopalni „Kazimierz-Juliusz”, która jest obecnie zatapiania. Monitoring realizowany jest z wykorzystaniem techniki GNSS oraz satelitarnej interferometrii radarowej (InSAR). W projekcie wykorzystywane są dane radarowe z projektu Copernicus, który realizowany jest przez Komisję Europejską we współpracy z Europejską Agencją Kosmiczną (ESA – European Space Agence). Monitoring techniką InSAR rozpoczęto w grudniu 2020 roku. Dodatkowo przeanalizowano powierzchniowe skutki pięciu wstrząsów górotworu o energii nieprzekraczającej wartości 6,5E+05 J (magnituda wstrząsu Mw = 2,1), które zarejestrowano w rejonie badań w latach 2018–2020. W artykule przedstawiono wyniki analizy jakościowej związków aktywności sejsmicznej z ruchami pionowymi powierzchni terenu. W celu zbadania potencjalnych zmian wysokościowych wykorzystano technologię DInSAR. Na podstawie obrazów interferometrycznych wygenerowanych z radarogramów w okresach przed i po wstrząsie, w styczniu 2019 roku, stwierdzono możliwość wystąpienia pionowych ruchów powierzchni terenu. Zmiany wysokościowe scharakteryzować można wartościami w zakresie pojedynczych milimetrów, wykraczających tylko nieznacznie poza zakres dokładności metody InSAR. Analiza interferogramów, obejmujących szersze bazy czasowe, wskazała na incydentalny wpływ wstrząsu na deformacje powierzchni terenu.

11

The stress and strain distribution in X10CrMoVNb9-1 power engineering steel after long time degradation studied by the ESPI system

Kopec Mateusz

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2022

|

Vol. 70, nr 3

art. no. e141181

EN

Maintenance of assets and equipment in power plants is essential for their safety and is required to help the plant stay active. In this paper, the specimens manufactured from a pipe of X10CrMoVNb9-1 (P91) power engineering steel in the as-received state and after operating for 80 000 h at internal pressure of 8.4 MPa and temperature of 540ºC were subjected to tests using electronic speckle pattern interferometry (ESPI) under static loading of up to 2.5 kN. Such a procedure enables assessment of strain and stress distribution maps to compare material integrity in the as-received state and after exploitation in its elastic range. The measurements conducted showed no effect of long time operation on the mechanical response of P91 steel under the power installations conditions since the field strain distributions for each type of specimen were found to be similar.

12

Zagrożenia geologiczne w Polsce w 2020 roku

Wojciechowski Tomasz, Laskowicz Izabela, Nescieruk Piotr, Marciniec Paweł, Uścinowicz Grzegorz, Czerwiński Tomasz, Perski Zbigniew

Przegląd Geologiczny

|

2021

|

Vol. 69, nr 5

303--311

EN

The paper describes geohazard events that took place in 2020 on the territory of Poland. The PGI is responsible for geohazard monitoring in four areas of interest :landslides and mass movements within the Landslide Counteracting System (LCS, SOPO in Polish), earthquakes within the Geodynamical Monitoring of Poland and ground motions within the Interferometric Terrain Deformations Monitoring of Poland, and coastal monitoring carried out by the Marine Geology Branch within a framework of the 4D Cartography. In 2020, there were no spectacular geohazard events; however, there were some permanently active phenomena, mostly landslides, which caused significant damages to the infrastructure.

13

Application of synthetic aperture radar interferometry to monitor surface deformations of the Trans-European Transport Network (TEN-T) - a case study of the motorways crossing areas of mining operations in the Upper Silesian coal basin, Poland

Stawinoga Mariusz, Pindel Tomasz, Smoliński Adam

Journal of Sustainable Mining

|

2021

|

Vol. 20, iss. 3

136--143

EN

Underground hard coal mining causes surface deformations. When the mining operations are conducted beneath linear objects, such as motorways, there is a risk of deformations of the axis of the road and its horizontal and vertical alignment (additional bends and vertical curvatures, longitudinal inclinations, deformations of cross-sections). In the areas subjected to mining operations, mining plants conduct geodetic monitoring. Due to their labour intensity and costs, geodetic measurements are usually made only a few times a year. The article discusses the possibility of applying Interferometric Synthetic Aperture Radar (InSAR) to monitor the subsidence of the vertical alignment of motorways caused by mining operations and its advantages and disadvantages compared to the currently used methods of geodetic measurements. The tests were conducted in two sections of motorways within the Upper Silesian Coal Basin (Poland) in the areas of intensive hard coal mining operations. Radar imaging of the surface made by the European Space Agency's (ESA) satellite Sentinel-1 equipped with the Synthetic Aperture Radar (SAR) was used.

14

Two methods to mitigate insar-based dems vegetation impenetrability bias

Tulski Sławomir, Bęcek Kazimierz

Geomatics, Landmanagement and Landscape

|

2021

|

no. 2

7--21

EN

Digital elevation models (DEM), including the Shuttle Radar Topography Mission (SRTM), are used in many branches of geoscience as an ultimate dataset representing our planet’s surface, making it possible to investigate processes that are shaping our world. The SRTM model exhibits elevation bias or systematic error over forests and vegetated areas due to the microwaves’ peculiar properties that penetrate the vegetation layer to a certain depth. Numerous investigations identified that the penetration depth depends on the forest density and height. In this contribution, two methods are proposed to remove the impact of the vegetation impenetrability effect. The first method is founded on the multiple regression of two forest characteristics, namely forest height and forest density. The second method uses a lookup table approach. The lookup table and the multiple regression explanatory variables are taken from the freely available datasets, including the forest density data (MODIS_VCF) and global tree height map (GTHM). An important role in this research is played by the Ice, Clouds, and Land Elevation Satellite (ICESat) data. The accuracy tests indicate that the first method eliminates approximately 68% of the elevation bias, while the second method appears to be more effective, leading to almost complete removal of the vegetation bias from the SRTM data. The methods are fine-tuned to the local coniferous forests in Poland. Additional studies are required to finetune the methods for the leaf-off state of deciduous forests. However, a new set of parameters for both methods can be quickly developed for different locations and forest types. Both methods’ functionality and effectiveness can be improved once more accurate forest tree height and vegetation density data become available. These methods are universal in mitigating the vegetation bias from the Synthetic Aperture Radar Interferometry (InSAR) derived model and photogrammetric models.

15

Assessing the application of GACOS atmospheric correction for DInSAR-based mining deformation monitoring by using Sentinel-1 data in Upper Silesian Coal Basin in Poland

Pawłuszek-Filipiak Kamila, Wielgocka Natalia, Lewandowski Tymon, Tondaś Damian

Geodesy and Cartography

|

2021

|

Vol. 70, no. 2

art. no. e10

EN

One of the most critical factors which determine the accuracy of deformation maps provided by Differential Synthetic Aperture Radar Interferometry (DInSAR) are atmospheric artefacts. Nowadays, one of the most popular approaches to minimize atmospheric artefacts is Generic Atmospheric Correction Online Service for InSAR (GACOS). Nevertheless, in the literature, the authors reported various effects of GACOS correction on the deformation estimates in different study areas Therefore, this paper aims to assess the effect of GACOS correction on the accuracy of DInSAR-based deformation monitoring in USCB by using Sentinel-1 data. For the accuracy evaluation, eight Global Navigation Satellite Systems (GNSS) permanent stations, as well as five low-cost GNSS receivers were utilized. GACOS-based DInSAR products were evaluated for: (1) single interferograms in different geometries; (2) cumulative deformation maps in various geometries and (3) decomposed results delivered from GACOS-based DInSAR measurements. Generally, based on the achieved results, GACOS correction had a positive effect on the accuracy of the deformation estimates in USCB by using DInSAR approach and Sentinel-1 data in each before mentioned aspect. When considering (1), it was possible to achieve Root Mean Square Error (RMSE) below 1 cm for a single interferogram for only 20% and 26% of the ascending and descending investigated interferograms, respectively when compared with GNSS measurements. The RMSE below 2 cm was achieved by 47% and 66% of the descending and ascending interferograms, respectively.

16

Współczesna interferometria plamkowa na tropach przyczyn uszkodzeń pod wpływem obciążeń zmęczeniowych

Kowalewski Zbigniew L., Szymczak Tadeusz, Ustrzycka Aneta

Dozór Techniczny

|

2021

|

z. 4

5--8

17

Analiza interferometryczna zmian powierzchni terenu, wywołanych silnym wstrząsem górotworu Górnośląskiego Zagłębia Węglowego w dniu 13.01.2020 o magnitudzie ML=4.0

Kura Karol

Przegląd Górniczy

|

2020

|

T. 76, nr 5

19--27

PL

Przedstawiono zastosowanie techniki satelitarnej interferometrii różnicowej (DInSAR) do monitorowania zmian powierzchni terenu, jakie wystąpiły w wyniku wstrząsu górniczego o energii sejsmicznej E= 3∙109J (magnituda ML=4.0), który miał miejsce 13.01.2020 r. w Górnośląskim Zagłębiu Węglowym, w południowej części kopalni Budryk. Dla określenia wielkości zmian powierzchni terenu, które miały miejsce przed i po wystąpieniu wstrząsu, zastosowano zobrazowania SAR wykonane przez satelity Sentinel-1. Został przeprowadzony cały proces analizy interferometrycznej, to jest sprawdzono koherencję poszczególnych zobrazowań, wygenerowano 7 interferogramów oraz wyznaczono przemieszczenia powierzchni terenu. Na interferogramie obejmującym czas bezpośrednio po wystąpieniu wstrząsu uwidacznia się bardzo wyraźna niecka obniżeniowa. Maksymalne obniżenie powierzchni wyniosło w tym czasie 35 mm. Kilkanaście dni przed powyższym wstrząsem górotworu obserwowane były również wyniesienia powierzchni terenu na obszarze większym niż sama niecka obniżeniowa. Opracowane wyniki pozwoliły na potwierdzenie możliwości wykorzystania metody satelitarnej interferometrii radarowej, jako narzędzia do szybkiego i precyzyjnego wyznaczania wielkości i zasięgu zmian na powierzchni terenu, powstałych wskutek wystąpienia silnego wstrząsu górniczego.

EN

The application of the satellite differential interferometry (DInSAR) technique to monitor changes in the terrain surface as a result of mining tremor, with seismic energy E = 3∙109J (local magnitude ML=4.0) has been presented. Above mentioned tremor took place on January 13, 2020 in the Upper Silesian Coal Basin in southern part of Budryk mine. To estimate the magnitude of the terrain surface changes that occurred before and after this tremor, SAR images from Sentinel-1 satellites were used. The whole process of interferometric analysis was carried out - the coherence of individual images was checked, 7 interferograms were generated and the surface displacements were determined. A very clear subsidence trough is visible on the interferogram imediately after the occurrence of analyzed mining tremor. The maximum subsidence of the surface, at that time reached 35 mm. A dozen or so days before the mining tremors, elevations of the land surface were also observed in an area larger than the subsidence basin itself. The developed results allowed to confirm the method of satellite radar interferometry as a tool for quick and precise determination of the size and extent of changes on the surface of the terrain where strong mining tremor occurred.

18

Sposób na zapadliska

Hejmanowski Ryszard

Geodeta : magazyn geoinformacyjny

|

2020

|

nr 5

34--35

19

A.D. 2045 : będą nowe sensory

Kurczyński Zdzisław

Geodeta : magazyn geoinformacyjny

|

2020

|

nr 7

14--15

20

Monitoring of displacements and deformations of the earth’s surface near the Stebnyk city using radar images of Sentinel-1

Trevoho Ihor, Chetverikov Borys, Babiy Lubov, Malanchuk Mariia

Geodesy and Cartography

|

2020

|

Vol. 69, no. 1

85--96

EN

This article applies radar interferometry technologies implemented in the ENVI SARscape and SNAP software environment provided by the processing of data from the Sentinel-1 satellite. The study was carried out based on six radar images of Sentinel-1A and Sentinel -1B taken from September 2017 until February 2018 with an interval of one month and on the radar-module of the already mentioned SNAP software. The main input data for solving the considered problem are radar images received from the satellite Sentinel-1B on the territory of Stebnyk-Truskavets for six months with an interval of one month. Monitoring of the Earth’s surface using radar data of the Sentinel-1A with a synthesized aperture is implemented with the application of interferometric methods of Persistent Scatterers and Small baselines interferometry for estimating small displacements of the Earth’s surface and structures. The obtained quantitative and qualitative indicators of monitoring do not answer the processes that take place and lead to vertical displacements the six months but do provide an opportunity to assess the extent and trends of their development. The specification in each case can be accomplished by ground methods, which greatly simplify the search for sites with critical parameters of vertical displacements which can have negative consequences and lead to an emergency.