Działalność Naukowo Badawcza

prof. dr hab. inż. Cezary Specht

Dabrowski Pawel S., Specht Cezary, Specht Mariusz, Makar Artur, Three-dimensional thematic map imaging of the yacht port on the example of the Polish National Sailing Centre marina in Gdańsk, Applied Sciences, 2076-3417, 10.3390/app11157016, 2021

Koc Władysław, Wilk Andrzej, Specht Cezary, Karwowski Krzysztof, Skibicki Jacek, Czaplewski Krzysztof, Judek Sławomir, Chrostowski Piotr, Szmagliński Jacek, Dąbrowski Paweł, Specht Mariusz, Grulkowski Sławomir, Licow Roksana, Determining horizontal curvature of railway track axis in mobile satellite measurements, Bulletin of the Polish Academy of Sciences-Technical Sciences, 0239-7528, 10.24425/bpasts.2021.139204, 2021

Dąbrowski Pawel S., Specht Cezary, Specht Mariusz, Burdziakowski Paweł, Makar Artur, Lewicka Oktawia, Integration of multi-source geospatial data from GNSS Receivers, terrestrial laser scanners, and unmanned aerial vehicles; Intégration de données géospatiales multi-sources provenant de récepteurs GNSS, de lasers à balayage terrestres et de drones, Canadian Journal of Remote Sensing, 0703-8992, 10.1080/07038992.2021.1922879, 2021

Specht Mariusz, Stateczny Andrzej, Specht Cezary, Widźgowski Szymon, Lewicka Oktawia, Wiśniewska Marta, Concept of an innovative autonomous unmanned system for bathymetric monitoring of shallow waterbodies (INNOBAT System), Energies, 1996-1073, 10.3390/en14175370, 2021

Specht Mariusz, Specht Cezary, Stateczny Andrzej, Marchel Łukasz, Lewicka Oktawia, Paliszewska-Mojsiuk Monika, Wiśniewska Marta, Determining the seasonal variability of the Territorial Sea Baseline in Poland (2018-2020) using integrated USV/GNSS/SBES measurements, Energies, 1996-1073, 10.3390/en14092693, 2021

Stateczny Andrzej, Specht Cezary, Specht Mariusz, Brčić David, Jugović Alen, Widźgowski Szymon, Wiśniewska Marta, Lewicka Oktawia, Study on the positioning accuracy of GNSS/INS systems supported by DGPS and RTK receivers for hydrographic surveys, Energies, 1996-1073, 10.3390/en14217413, 2021

Figiel Sławomir, Specht Cezary, Moszyński Marek, Stateczny Andrzej, Specht Mariusz, Testing of software for the planning of a linear object GNSS measurement campaign under simulated conditions, Energies, 1996-1073, 10.3390/en14237896, 2021

Szot Tomasz, Specht Cezary, Dabrowski Pawel S., Specht Mariusz, Comparative analysis of positioning accuracy of Garmin Forerunner wearable GNSS receivers in dynamic testing, MEASUREMENT, 0263-2241, 10.1016/j.measurement.2021.109846, 2021

Wilk Andrzej, Koc Władysław, Specht Cezary, Skibicki Jacek, Judek Slawomir, Karwowski Krzysztof, Chrostowski Piotr, Szmagliński Jacek, Dąbrowski Paweł, Czaplewski Krzysztof, Specht Mariusz, Licow Roksana, Grulkowski Sławomir, Innovative mobile method to determine railway track axis position in global coordinate system using position measurements performed with GNSS and fixed base of the measuring vehicle, MEASUREMENT, 0263-2241, 10.1016/j.measurement.2021.109016, 2021

Lewicka Oktawia, Specht Mariusz, Stateczny Andrzej, Specht Cezary, Brčić David, Jugović Alen, Widźgowski Szymon, Wiśniewska Marta, Analysis of GNSS, hydroacoustic and optoelectronic data integration methods used in hydrography, SENSORS, 1424-8220, 10.3390/s21237831, 2021

Specht Cezary, Radio navigation systems: definitions and classifications, The Journal of Navigation, 0373-4633, 10.1017/S0373463321000369, 2021

Specht C., Lewicka O., Specht M., Zblewski S., Impact of hydrotechnical structures on forming the tombolo oceanographic phenomenon in Kołobrzeg and Sopot, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.15.03.25, 2021

Wilk Andrzej, Specht Cezary, Koc Władysław, Karwowski Krzysztof, Skibicki Jacek, Czaplewski Krzysztof, Chrostowski Piotr, Dabrowski Pawel S., Grulkowski Sławomir, Judek Sławomir, Specht Mariusz, Szmagliński Jacek, Correction of determined coordinates of railway tracks in mobile satellite measurements; Korygowanie wyznaczonych współrzędnych osi toru kolejowego w mobilnych pomiarach satelitarnych, Diagnostyka, 1641-6414, 10.29354/diag/125626, 2020

Specht Cezary, Specht Mariusz, Marchel Łukasz, Assessment of the steering precision of a hydrographic USV along sounding profiles using a high-precision GNSS RTK receiver supported autopilot, Energies, 1996-1073, 10.3390/en13215637, 2020

Specht Mariusz, Specht Cezary, Dąbrowski Paweł, Czaplewski Krzysztof, Smolarek Leszek, Lewicka Oktawia, Road tests of the positioning accuracy of INS/GNSS systems based on MEMS technology for navigating railway vehicles, Energies, 1996-1073, 10.3390/en13174463, 2020

Specht Cezary, Specht Mariusz, Marchel Łukasz, Testing the accuracy of the modified ICP algorithm with multimodal weighting factors, Energies, 1996-1073, 10.3390/en13225939, 2020

Specht Mariusz, Specht Cezary, Wilk Andrzej, Koc Władysław, Smolarek Leszek, Czaplewski Krzysztof, Karwowski Krzysztof, Dąbrowski Paweł S., Skibicki Jacek, Chrostowski Piotr, Szmagliński Jacek, Grulkowski Sławomir, Judek Sławomir, Testing the positioning accuracy of GNSS solutions during the tramway track mobile satellite measurements in diverse urban signal reception conditions, Energies, 1996-1073, 10.3390/en13143646, 2020

Specht Cezary, Dabrowski Pawel S., Specht Mariusz, 3D modelling of beach topography changes caused by the tombolo phenomenon using terrestrial laser scanning (TLS) and unmanned aerial vehicle (UAV) photogrammetry on the example of the city of Sopot, Geo-Marine Letters, 0276-0460, 10.1007/s00367-020-00665-5, 2020

Makar Artur, Specht Cezary, Specht Mariusz, Dąbrowski Paweł, Szafran Maciej, Integrated geodetic and hydrographic measurements of the yacht port for nautical charts and dynamic spatial presentation, Geosciences, 2076-3263, 10.3390/geosciences10050203, 2020

Specht Cezary, Lewicka Oktawia, Specht Mariusz, Dąbrowski Paweł, Burdziakowski Paweł, Methodology for carrying out measurements of the tombolo geomorphic landform using Unmanned Aerial and Surface Vehicles near Sopot pier, Poland, Journal of Marine Science and Engineering, 2077-1312, 10.3390/jmse8060384, 2020

Specht Mariusz, Specht Cezary, Lewicka Oktawia, Makar Artur, Burdziakowski Paweł, Dąbrowski Paweł, Study on the coastline evolution in Sopot (2008-2018) based on Landsat satellite imagery, Journal of Marine Science and Engineering, 2077-1312, 10.3390/jmse8060464, 2020

Dąbrowski Paweł S., Specht Cezary, Felski Andrzej, Koc Władysław, Wilk Andrzej, Czaplewski Krzysztof, Karwowski Krzysztof, Jaskólski Krzysztof, Specht Mariusz, Chrostowski Piotr, Szmagliński Jacek, The accuracy of a marine satellite compass under terrestrial urban conditions, Journal of Marine Science and Engineering, 2077-1312, 10.3390/jmse8010018, 2020

Specht Cezary, Szot Tomasz, Dąbrowski Paweł, Specht Mariusz, Testing GNSS receiver accuracy in Samsung Galaxy series mobile phones at a sports stadium, Measurement Science and Technology, 0957-0233, 10.1088/1361-6501/ab75b2, 2020

Wilk Andrzej, Specht Cezary, Koc Władysław, Karwowski Krzysztof, Skibicki Jacek, Szmagliński Jacek, Dąbrowski Paweł, Specht Mariusz, Zienkiewicz Marek, Judek Sławomir, Chrostowski Piotr, Skóra Marcin, Grulkowski Sławomir, Wyznaczanie osi torów tramwajowych z wykorzystaniem satelitarnego wieloantenowego systemu pomiarowego; Determination of the tram track axis using a multi receiver GNSS measurement system, Przegląd Komunikacyjny, 0033-2232, 2020

Specht Mariusz, Specht Cezary, Mindykowski Janusz, Dąbrowski Paweł, Maśnicki Romuald, Makar Artur, Geospatial modeling of the tombolo phenomenon in Sopot using integrated geodetic and hydrographic measurement methods, Remote Sensing, 2072-4292, 10.3390/rs12040737, 2020

Specht Mariusz, Specht Cezary, Szafran Maciej, Makar Artur, Dąbrowski Paweł, Lasota Henryk, Cywiński Piotr, The use of USV to develop navigational and bathymetric charts of yacht ports on the example of National Sailing Centre in Gdańsk, Remote Sensing, 2072-4292, 10.3390/rs12162585, 2020

Specht Cezary, Wilk Andrzej, Koc Wladyslaw, Karwowski Krzysztof, Dąbrowski Paweł, Specht Mariusz, Grulkowski Sławomir, Chrostowski Piotr, Szmagliński Jacek, Czaplewski Krzysztof, Skibicki Jacek, Judek Slawomir, Licow Roksana, Verification of GNSS measurements of the railway track using standard techniques for determining coordinates, Remote Sensing, 2072-4292, 10.3390/rs12182874, 2020

Specht Mariusz, Szmagliński Jacek, Specht Cezary, Koc Władysław, Wilk Andrzej, Czaplewski Krzysztof, Karwowski Krzysztof, Dąbrowski Paweł S., Chrostowski Piotr, Grulkowski Sławomir, Analysis of positioning methods using Global Navigation Satellite Systems (GNSS) in Polish State Railways (PKP), Scientific Journals of the Maritime University of Szczecin, 1733-8670, 10.17402/416, 2020

Czaplewski Krzysztof, Specht Cezary, Koc Władysław, Wilk Andrzej, Karwowski Krzysztof, Dąbrowski Paweł, Specht Mariusz, Chrostowski Piotr, Szmaglinski Jacek, Atypical application of the parametric method for track infrastructure inventory, Scientific Journals of the Maritime University of Szczecin, 1733-8670, 10.17402/397, 2020

Maśnicki Romuald, Specht Cezary, Mindykowski Janusz, Dąbrowski Paweł, Specht Mariusz, Accuracy analysis of measuring X-Y-Z coordinates with regard to the investigation of the Tombolo effect, SENSORS, 1424-8220, 10.3390/s20041167, 2020

Czaplewski Krzysztof, Wisniewski Zbigniew, Specht Cezary, Wilk Andrzej, Koc Wladyslaw, Karwowski Krzysztof, Skibicki Jacek, Dabrowski Paweł, Czaplewski Bartosz, Specht Mariusz, Chrostowski Piotr, Szmaglinski Jacek, Judek Slawomir, Grulkowski Slawomir, Licow Roksana, Application of least squares with conditional equations method for railway track inventory using GNSS observations, SENSORS, 1424-8220, 10.3390/s20174948, 2020

Wilk Andrzej, Koc Wladyslaw, Specht Cezary, Judek Slawomir, Karwowski Krzysztof, Chrostowski Piotr, Czaplewski Krzysztof, Dabrowski Pawel S., Grulkowski Sławomir, Licow Roksana, Skibicki Jacek, Specht Mariusz, Szmaglinski Jacek, Digital filtering of railway track coordinates in mobile multi-receiver GNSS measurements, SENSORS, 1424-8220, 10.3390/s20185018, 2020

Wilk Andrzej, Specht Cezary, Koc Wladyslaw, Karwowski Krzysztof, Skibicki Jacek, Szmagliński Jacek, Chrostowski Piotr, Dabrowski Pawel, Specht Mariusz, Zienkiewicz Marek, Judek Slawomir, Skóra Marcin, Grulkowski Sławomir, Evaluation of the possibility of identifying a complex polygonal tram track layout using multiple satellite measurements, SENSORS, 1424-8220, 10.3390/s20164408, 2020

Makar Artur, Specht Cezary, Specht Mariusz, Dąbrowski Paweł, Burdziakowski Paweł, Lewicka Oktawia, Seabed topography changes in the Sopot pier zone in 2010-2018 influenced by tombolo phenomenon, SENSORS, 1424-8220, 10.3390/s20216061, 2020

Burdziakowski Pawel, Specht Cezary, Dabrowski Pawel S., Specht Mariusz, Lewicka Oktawia, Makar Artur, Using UAV photogrammetry to analyse changes in the coastal zone based on the Sopot tombolo (salient) measurement project, SENSORS, 1424-8220, 10.3390/s20144000, 2020

Specht Cezary, Mindykowski Janusz, Dąbrowski Paweł, Maśnicki Romuald, Marchel Łukasz, Specht Mariusz, Metrological aspects of the Tombolo effect investigation - Polish case study, 2019 IMEKO TC-19 International Workshop on Metrology for the Sea (MetroSea 2019); proceedings October 3-5 2019 Genova, Italy, IMEKO, [Budapest], s. 7, 978-92-990084-2-3, 2019

Specht Cezary, Dąbrowski Paweł S., Pawelski Jan, Specht Mariusz, Szot Tomasz, Comparative analysis of positioning accuracy of GNSS receivers of Samsung Galaxy smartphones in marine dynamic measurements, Advances in Space Research, 0273-1177, 10.1016/j.asr.2018.05.019, 2019

Koc Wladyslaw, Specht Cezary, Szmagliński Jacek, Chrostowski Piotr, A method for determination and compensation of a cant influence in a track centerline identification using GNSS methods and inertial measurement, Applied Sciences, 2076-3417, 10.3390/app9204347, 2019

Specht Mariusz, Specht Cezary, Wąż Mariusz, Dąbrowski Paweł, Skóra Marcin, Marchel Łukasz, Determining the variability of the territorial sea baseline on the example of waterbody adjacent to the municipal beach in Gdynia, Applied Sciences, 2076-3417, 10.3390/app9183867, 2019

Specht Mariusz, Specht Cezary, Wąż Mariusz, Naus Krzysztof, Grządziel Artur, Iwen Dominik, Methodology for performing territorial sea baseline measurements in selected waterbodies of Poland, Applied Sciences, 2076-3417, 10.3390/app9153053, 2019

Specht Cezary, Szot Tomasz, Specht Mariusz, Dąbrowski Paweł, Selected aspects of testing the positioning accuracy of GNSS receivers used in sports and recreation by dynamic measurements, Baltic Journal of Health and Physical Activity, 2080-1297, 10.29359/BJHPA.11.2.08, 2019

Specht Cezary, Specht Mariusz, Cywiński Piotr, Skóra Marcin, Marchel Łukasz, Szychowski Piotr, A new method for determining the territorial sea baseline using an unmanned, hydrographic surface vessel, Journal of Coastal Research, 0749-0208, 10.2112/JCOASTRES-D-18-00166.1, 2019

Specht Cezary, Pawelski Jan, Smolarek Leszek, Specht Mariusz, Dąbrowski Paweł, Assessment of the positioning accuracy of DGPS and EGNOS systems in the Bay of Gdansk using maritime dynamic measurements, JOURNAL OF NAVIGATION, 0373-4633, 10.1017/S0373463318000838, 2019

Koc Wladyslaw, Specht Cezary, Chrostowski Piotr, Szmagliński Jacek, Analysis of the possibilities in railways shape assessing using GNSS mobile measurements, MATEC Web of Conferences, 10.1051/matecconf/201926211004, 2019

Dąbrowski Paweł, Specht Cezary, Spatial expansion of the symmetrical objects point clouds to the lateral surface of the cylinder – mathematical model, MEASUREMENT, 0263-2241, 10.1016/j.measurement.2018.10.036, 2019

Specht Cezary, Koc Władysław, Chrostowski Piotr, Szmagliński Jacek, Accuracy assessment of mobile satellite measurements in relation to the geometrical layout of rail tracks, Metrology and Measurement Systems, 0860-8229, 10.24425/mms.2019.128359, 2019

Szot Tomasz, Specht Cezary, Specht Mariusz, Dąbrowski Paweł S., Comparative analysis of positioning accuracy of Samsung Galaxy smartphones in stationary measurements, Plos One, 10.1371/journal.pone.0215562, 2019

Specht Cezary, Smolarek Leszek, Pawelski Jan, Specht Mariusz, Dąbrowski Paweł, Polish DGPS system: 1995-2017 - study of positioning accuracy, Polish Maritime Research, 1233-2585, 10.2478/pomr-2019-0021, 2019

Wilk Andrzej, Specht Cezary, Koc Władysław, Karwowski Krzysztof, Chrostowski Piotr, Szmagliński Jacek, Dąbrowski Paweł, Specht Mariusz, Judek Sławomir, Skibicki Jacek, Skóra Marcin, Grulkowski Sławomir, Projekt badawczy BRIK: Opracowanie innowacyjnej metody wyznaczania precyzyjnej trajektorii pojazdu szynowego; Research project BRIK: development of an innovative method for determining the precise trajectory of a railway vehicle, Przegląd Komunikacyjny, 0033-2232, 2019

Dąbrowski Paweł S., Specht Cezary, Koc Władysław, Wilk Andrzej, Czaplewski Krzysztof, Karwowski Krzysztof, Specht Mariusz, Chrostowski Piotr, Szmagliński Jacek, Grulkowski Sławomir, Installation of GNSS receivers on a mobile railway platform - methodology and measurement aspects, Scientific Journals of the Maritime University of Szczecin, 1733-8670, 10.17402/367, 2019

Specht Mariusz, Specht Cezary, Lasota Henryk, Cywiński Piotr, Assessment of the steering precision of a hydrographic unmanned surface vessel (usv) along sounding profiles using a low-cost multi-Global Navigation Satellite System (GNSS) receiver supported autopilot, SENSORS, 1424-8220, 10.3390/s19183939, 2019

Specht Cezary, Specht Mariusz, Dąbrowski Paweł S., Polish DGPS system: 1995-2018 - studies of reference station operating zones, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.13.03.13, 2019

Czaplewski Krzysztof, Specht Cezary, Dąbrowski Paweł, Specht Mariusz, Wiśniewski Zbigniew, Koc Władysław, Wilk Andrzej, Karwowski Krzysztof, Chrostowski Piotr, Szmagliński Jacek, Use of a least squares with conditional equations method in positioning a tramway track in the Gdansk agglomeration, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.13.04.25, 2019

Specht Mariusz, Specht Cezary, Hydrographic survey planning for the determination of territorial sea baseline on the example of selected Polish sea areas, 18th International Multidisciplinary Scientific GeoConference SGEM 2018; conference proceedings, volume 18 : Geodesy and mine surveying. Informatics, geoinformatics and remote sensing, issue 2.2, 2 July – 8 July, 2018, Albena, Bulgaria, STEF92 Technology Ltd., Sofia, s. 829, 978-619-7408-40-9, 10.5593/sgem2018/2.2/S09.105, 2018

Specht Cezary, Specht Mariusz, The concept of integrated system for collecting geographic and hydrographic data for navigation purposes in RIS, 18th International Multidisciplinary Scientific GeoConference SGEM 2018; conference proceedings, volume 18 : Geodesy and mine surveying. Informatics, geoinformatics and remote sensing, issue 2.2, 2 July – 8 July, 2018, Albena, Bulgaria, STEF92 Technology Ltd., Sofia, s. 1019, 978-619-7408-40-9, 10.5593/sgem2018/2.2/S09.129, 2018

Specht Mariusz, Specht Cezary, The use of GNSS geodetic networks on the approach to the ports – Gulf of Gdańsk study, 18th International Multidisciplinary Scientific GeoConference SGEM 2018; conference proceedings, volume 18 : Geodesy and mine surveying. Informatics, geoinformatics and remote sensing, issue 2.2, 2 July – 8 July, 2018, Albena, Bulgaria, STEF92 Technology Ltd., Sofia, s. 1075, 978-619-7408-40-9, 10.5593/sgem2018/2.2/S09.136, 2018

Specht Cezary, Koc Władysław, Chrostowski Piotr, Projektowanie i eksploatacja dróg szynowych z wykorzystaniem mobilnych pomiarów satelitarnych, Wydawnictwo Politechniki Gdańskiej, Gdańsk, 248, [2] s., 978-83-7348-735-2, 2018

Specht Cezary, Koc Władysław, Chrostowski Piotr, Metodyka projektowania i eksploatacji dróg szynowych z wykorzystaniem mobilnych pomiarów satelitarnych; The method of designing and exploitation of railway lines using the mobile satellite surveying, Inżynieria kolejowa - szanse i wyzwania; 64. Konferencja Naukowa Komitetu Inżynierii Lądowej i Wodnej PAN oraz Komitetu Nauki PZITB; Railway engineering - opportunities and challenges, Politechnika Krakowska im. Tadeusza Kościuszki, Kraków, s. 121, 978-83-909811-5-4, 2018

Specht Cezary, Koc Władysław, Chrostowski Piotr, Szmagliński Jacek, Możliwości oceny kształtu toru z wykorzystaniem mobilnych pomiarów GNSS; Analysis of the possibilities in railways shape assessing using GNSS mobile measurements, Inżynieria kolejowa - szanse i wyzwania; 64. Konferencja Naukowa Komitetu Inżynierii Lądowej i Wodnej PAN oraz Komitetu Nauki PZITB; Railway engineering - opportunities and challenges, Politechnika Krakowska im. Tadeusza Kościuszki, Kraków, s. 337, 978-83-909811-5-4, 2018

Specht Cezary, Specht Mariusz, Makar A., Availability of the GNSS geodetic networks position during the hydrographic surveys in the ports, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.12.04.02, 2018

Specht Cezary, Specht Mariusz, Dąbrowski Paweł, Comparative analysis of active geodetic networks in Poland, 17th International Multidisciplinary Scientific GeoConference SGEM 2017; conference proceedings, volume 17 : Geodesy and mine surveying. Informatics, geoinformatics and remote sensing, issue 22, 29 June - 5 July, 2017, Albena, Bulgaria, STEF92 Technology Ltd., Sofia, s. 163, 978-619-7408-02-7, 10.5593/sgem2017/22/S09.021, 2017

Specht Cezary, Skóra Marcin, Planning GPS measurements of a linear object for a specified time interval, Annual of Navigation, 1640-8632, 10.1515/aon-2017-0006, 2017

Specht Cezary, Weintrit Adam, Specht Mariusz, Dąbrowski Paweł, Determination of the territorial sea baseline – measurement aspect, IOP Conference Series: Earth and Environmental Science, 1755-1307, 10.1088/1755-1315/95/3/032011, 2017

Specht Cezary, Specht Mariusz, Świtalski Emilian, Application of an autonomous/unmanned survey vessel (ASV/USV) in bathymetric measurements, Polish Maritime Research, 1233-2585, 10.1515/pomr-2017-0088, 2017

Specht Cezary, Dąbrowski Paweł, Runaway PRN11 GPS satellite, The 10th International Conference Environmental Engineering; 10th ICEE : selected papers, April 27-28, 2017 Vilnius, Lithuania, Vilnius Gediminas Technical University Press Technika, Wilno, art. no. UNSP enviro.2017.244, s. 1, 10.3846/enviro.2017.244, 2017

Specht Cezary, Koc Wladyslaw, Chrostowski Piotr, Szmaglinski Jacek, The analysis of tram tracks geometric layout based on mobile satellite measurements, Urban Rail Transit, 2199-6687, 10.1007/s40864-017-0071-3, 2017

Specht Cezary, Mierzejek Marta, Wybrane aspekty adaptacyjnego systemu wyznaczania tras ewakuacyjnych w budynkach; Selected aspects of the adaptive escape route designation system for buildings, Zeszyty Naukowe Akademii Morskiej w Gdyni, 1644-1818, 2017

Specht Cezary, Szot Tomasz, Position accuracy and fix rate of athletes in location monitoring, Baltic Journal of Health and Physical Activity, 2080-1297, 2016

Specht Cezary, Koc W., Chrostowski P., Palikowska K., Designing of track axis alignment with the use of satellite measurements and particle swarm optimization, British Journal of Applied Science & Technology, 2231-0843, 10.9734/BJAST/2016/30999, 2016

Specht Cezary, Szot Tomasz, Testing methodology for GNSS receivers used in sports and recreation. Outline of issues, Coordination abilities in physical education, sports and rehabilitation, Józef Piłsudski University of Physical Education, Warsaw. Faculty of Physical Education and Sport, Biała Podlaska, 246-259, 978-83-61509-36-3, 2016

Specht Cezary, Specht Mariusz, Weintrit Adam, A history of maritime radio-navigation positioning systems used in Poland, JOURNAL OF NAVIGATION, 0373-4633, 10.1017/S0373463315000879, 2016

Specht Cezary, Chrostowski Piotr, Koc Władysław, Computer-aided evaluation of the railway track geometry on the basis of satellite measurements, Open Engineering, 10.1515/eng-2016-0017, 2016

Specht Cezary, Rudnicki Jacek, A method for the assessing of reliability characteristics relevant to an assumed position-fixing accuracy in navigational positioning systems, Polish Maritime Research, 1233-2585, 10.1515/pomr-2016-0028, 2016

Dąbrowski Paweł, Specht Cezary, Specht Mariusz, Chrostowski Piotr, Dera Marcin, Koc Władysław, Szmagliński Jacek, Skóra Marcin, Mobilne pomiary satelitarne na liniach Pomorskiej Kolei Metropolitalnej; Mobile satellite measurements on the Pomeranian Metropolitan Railway, Przegląd Komunikacyjny, 0033-2232, 2016

Specht Cezary, Specht Mariusz, Weintrit Adam, Determination of the territorial sea baseline – aspect of using unmanned hydrographic vessels, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.10.04.15, 2016

Dąbrowski Paweł, Specht Cezary, Dumalski A., Hejbudzka K., Modeling 3D objects for navigation purposes using laser scanning, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.10.02.12, 2016

Specht Mariusz, Weintrit Adam, Dąbrowski Paweł, Specht Cezary, Wyznaczanie linii podstawowej i zewnętrznej granicy morza terytorialnego – aspekt metodyczny; Determination of the baseline and outer limit of the territorial sea – methodical aspect, Zeszyty Naukowe Akademii Morskiej w Gdyni, 1644-1818, 2016

Specht Cezary, Specht Mariusz, Mania Mateusz, Skóra Marcin, Accuracy of the GPS positioning system in the context of increasing the number of satellites in the constellation, Polish Maritime Research, 1233-2585, 10.1515/pomr-2015-0012, 2015

Weintrit Adam, Rogowski Jerzy, Specht Cezary, Leszczyński Wojciech, Evaluation of Positioning Functionality in ASG EUPOS for Hydrography and Off-shore Navigation, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.09.02.09, 2015

dr inż. Paweł Dąbrowski

Dabrowski Pawel S., Specht Cezary, Specht Mariusz, Makar Artur, Three-dimensional thematic map imaging of the yacht port on the example of the Polish National Sailing Centre marina in Gdańsk, Applied Sciences, 2076-3417, 10.3390/app11157016, 2021

Koc Władysław, Wilk Andrzej, Specht Cezary, Karwowski Krzysztof, Skibicki Jacek, Czaplewski Krzysztof, Judek Sławomir, Chrostowski Piotr, Szmagliński Jacek, Dąbrowski Paweł, Specht Mariusz, Grulkowski Sławomir, Licow Roksana, Determining horizontal curvature of railway track axis in mobile satellite measurements, Bulletin of the Polish Academy of Sciences-Technical Sciences, 0239-7528, 10.24425/bpasts.2021.139204, 2021

Dąbrowski Pawel S., Specht Cezary, Specht Mariusz, Burdziakowski Paweł, Makar Artur, Lewicka Oktawia, Integration of multi-source geospatial data from GNSS Receivers, terrestrial laser scanners, and unmanned aerial vehicles; Intégration de données géospatiales multi-sources provenant de récepteurs GNSS, de lasers à balayage terrestres et de drones, Canadian Journal of Remote Sensing, 0703-8992, 10.1080/07038992.2021.1922879, 2021

Szot Tomasz, Specht Cezary, Dabrowski Pawel S., Specht Mariusz, Comparative analysis of positioning accuracy of Garmin Forerunner wearable GNSS receivers in dynamic testing, MEASUREMENT, 0263-2241, 10.1016/j.measurement.2021.109846, 2021

Wilk Andrzej, Koc Władysław, Specht Cezary, Skibicki Jacek, Judek Slawomir, Karwowski Krzysztof, Chrostowski Piotr, Szmagliński Jacek, Dąbrowski Paweł, Czaplewski Krzysztof, Specht Mariusz, Licow Roksana, Grulkowski Sławomir, Innovative mobile method to determine railway track axis position in global coordinate system using position measurements performed with GNSS and fixed base of the measuring vehicle, MEASUREMENT, 0263-2241, 10.1016/j.measurement.2021.109016, 2021

Dabrowski Pawel S., The symmetry of GPS orbit ascending nodes, Remote Sensing, 2072-4292, 10.3390/rs13030387, 2021

Wilk Andrzej, Specht Cezary, Koc Władysław, Karwowski Krzysztof, Skibicki Jacek, Czaplewski Krzysztof, Chrostowski Piotr, Dabrowski Pawel S., Grulkowski Sławomir, Judek Sławomir, Specht Mariusz, Szmagliński Jacek, Correction of determined coordinates of railway tracks in mobile satellite measurements; Korygowanie wyznaczonych współrzędnych osi toru kolejowego w mobilnych pomiarach satelitarnych, Diagnostyka, 1641-6414, 10.29354/diag/125626, 2020

Specht Mariusz, Specht Cezary, Dąbrowski Paweł, Czaplewski Krzysztof, Smolarek Leszek, Lewicka Oktawia, Road tests of the positioning accuracy of INS/GNSS systems based on MEMS technology for navigating railway vehicles, Energies, 1996-1073, 10.3390/en13174463, 2020

Specht Mariusz, Specht Cezary, Wilk Andrzej, Koc Władysław, Smolarek Leszek, Czaplewski Krzysztof, Karwowski Krzysztof, Dąbrowski Paweł S., Skibicki Jacek, Chrostowski Piotr, Szmagliński Jacek, Grulkowski Sławomir, Judek Sławomir, Testing the positioning accuracy of GNSS solutions during the tramway track mobile satellite measurements in diverse urban signal reception conditions, Energies, 1996-1073, 10.3390/en13143646, 2020

Specht Cezary, Dabrowski Pawel S., Specht Mariusz, 3D modelling of beach topography changes caused by the tombolo phenomenon using terrestrial laser scanning (TLS) and unmanned aerial vehicle (UAV) photogrammetry on the example of the city of Sopot, Geo-Marine Letters, 0276-0460, 10.1007/s00367-020-00665-5, 2020

Makar Artur, Specht Cezary, Specht Mariusz, Dąbrowski Paweł, Szafran Maciej, Integrated geodetic and hydrographic measurements of the yacht port for nautical charts and dynamic spatial presentation, Geosciences, 2076-3263, 10.3390/geosciences10050203, 2020

Specht Cezary, Lewicka Oktawia, Specht Mariusz, Dąbrowski Paweł, Burdziakowski Paweł, Methodology for carrying out measurements of the tombolo geomorphic landform using Unmanned Aerial and Surface Vehicles near Sopot pier, Poland, Journal of Marine Science and Engineering, 2077-1312, 10.3390/jmse8060384, 2020

Specht Mariusz, Specht Cezary, Lewicka Oktawia, Makar Artur, Burdziakowski Paweł, Dąbrowski Paweł, Study on the coastline evolution in Sopot (2008-2018) based on Landsat satellite imagery, Journal of Marine Science and Engineering, 2077-1312, 10.3390/jmse8060464, 2020

Dąbrowski Paweł S., Specht Cezary, Felski Andrzej, Koc Władysław, Wilk Andrzej, Czaplewski Krzysztof, Karwowski Krzysztof, Jaskólski Krzysztof, Specht Mariusz, Chrostowski Piotr, Szmagliński Jacek, The accuracy of a marine satellite compass under terrestrial urban conditions, Journal of Marine Science and Engineering, 2077-1312, 10.3390/jmse8010018, 2020

Specht Cezary, Szot Tomasz, Dąbrowski Paweł, Specht Mariusz, Testing GNSS receiver accuracy in Samsung Galaxy series mobile phones at a sports stadium, Measurement Science and Technology, 0957-0233, 10.1088/1361-6501/ab75b2, 2020

Wilk Andrzej, Specht Cezary, Koc Władysław, Karwowski Krzysztof, Skibicki Jacek, Szmagliński Jacek, Dąbrowski Paweł, Specht Mariusz, Zienkiewicz Marek, Judek Sławomir, Chrostowski Piotr, Skóra Marcin, Grulkowski Sławomir, Wyznaczanie osi torów tramwajowych z wykorzystaniem satelitarnego wieloantenowego systemu pomiarowego; Determination of the tram track axis using a multi receiver GNSS measurement system, Przegląd Komunikacyjny, 0033-2232, 2020

Specht Mariusz, Specht Cezary, Mindykowski Janusz, Dąbrowski Paweł, Maśnicki Romuald, Makar Artur, Geospatial modeling of the tombolo phenomenon in Sopot using integrated geodetic and hydrographic measurement methods, Remote Sensing, 2072-4292, 10.3390/rs12040737, 2020

Specht Mariusz, Specht Cezary, Szafran Maciej, Makar Artur, Dąbrowski Paweł, Lasota Henryk, Cywiński Piotr, The use of USV to develop navigational and bathymetric charts of yacht ports on the example of National Sailing Centre in Gdańsk, Remote Sensing, 2072-4292, 10.3390/rs12162585, 2020

Specht Cezary, Wilk Andrzej, Koc Wladyslaw, Karwowski Krzysztof, Dąbrowski Paweł, Specht Mariusz, Grulkowski Sławomir, Chrostowski Piotr, Szmagliński Jacek, Czaplewski Krzysztof, Skibicki Jacek, Judek Slawomir, Licow Roksana, Verification of GNSS measurements of the railway track using standard techniques for determining coordinates, Remote Sensing, 2072-4292, 10.3390/rs12182874, 2020

Specht Mariusz, Szmagliński Jacek, Specht Cezary, Koc Władysław, Wilk Andrzej, Czaplewski Krzysztof, Karwowski Krzysztof, Dąbrowski Paweł S., Chrostowski Piotr, Grulkowski Sławomir, Analysis of positioning methods using Global Navigation Satellite Systems (GNSS) in Polish State Railways (PKP), Scientific Journals of the Maritime University of Szczecin, 1733-8670, 10.17402/416, 2020

Czaplewski Krzysztof, Specht Cezary, Koc Władysław, Wilk Andrzej, Karwowski Krzysztof, Dąbrowski Paweł, Specht Mariusz, Chrostowski Piotr, Szmaglinski Jacek, Atypical application of the parametric method for track infrastructure inventory, Scientific Journals of the Maritime University of Szczecin, 1733-8670, 10.17402/397, 2020

Maśnicki Romuald, Specht Cezary, Mindykowski Janusz, Dąbrowski Paweł, Specht Mariusz, Accuracy analysis of measuring X-Y-Z coordinates with regard to the investigation of the Tombolo effect, SENSORS, 1424-8220, 10.3390/s20041167, 2020

Czaplewski Krzysztof, Wisniewski Zbigniew, Specht Cezary, Wilk Andrzej, Koc Wladyslaw, Karwowski Krzysztof, Skibicki Jacek, Dabrowski Paweł, Czaplewski Bartosz, Specht Mariusz, Chrostowski Piotr, Szmaglinski Jacek, Judek Slawomir, Grulkowski Slawomir, Licow Roksana, Application of least squares with conditional equations method for railway track inventory using GNSS observations, SENSORS, 1424-8220, 10.3390/s20174948, 2020

Wilk Andrzej, Koc Wladyslaw, Specht Cezary, Judek Slawomir, Karwowski Krzysztof, Chrostowski Piotr, Czaplewski Krzysztof, Dabrowski Pawel S., Grulkowski Sławomir, Licow Roksana, Skibicki Jacek, Specht Mariusz, Szmaglinski Jacek, Digital filtering of railway track coordinates in mobile multi-receiver GNSS measurements, SENSORS, 1424-8220, 10.3390/s20185018, 2020

Wilk Andrzej, Specht Cezary, Koc Wladyslaw, Karwowski Krzysztof, Skibicki Jacek, Szmagliński Jacek, Chrostowski Piotr, Dabrowski Pawel, Specht Mariusz, Zienkiewicz Marek, Judek Slawomir, Skóra Marcin, Grulkowski Sławomir, Evaluation of the possibility of identifying a complex polygonal tram track layout using multiple satellite measurements, SENSORS, 1424-8220, 10.3390/s20164408, 2020

Makar Artur, Specht Cezary, Specht Mariusz, Dąbrowski Paweł, Burdziakowski Paweł, Lewicka Oktawia, Seabed topography changes in the Sopot pier zone in 2010-2018 influenced by tombolo phenomenon, SENSORS, 1424-8220, 10.3390/s20216061, 2020

Burdziakowski Pawel, Specht Cezary, Dabrowski Pawel S., Specht Mariusz, Lewicka Oktawia, Makar Artur, Using UAV photogrammetry to analyse changes in the coastal zone based on the Sopot tombolo (salient) measurement project, SENSORS, 1424-8220, 10.3390/s20144000, 2020

Dąbrowski Paweł S., Zienkiewicz Marek H., 3D point-cloud spatial expansion by total least-squares line fitting, The Photogrammetric Record, 1477-9730, 10.1111/phor.12345, 2020

Specht Cezary, Mindykowski Janusz, Dąbrowski Paweł, Maśnicki Romuald, Marchel Łukasz, Specht Mariusz, Metrological aspects of the Tombolo effect investigation - Polish case study, 2019 IMEKO TC-19 International Workshop on Metrology for the Sea (MetroSea 2019); proceedings October 3-5 2019 Genova, Italy, IMEKO, [Budapest], s. 7, 978-92-990084-2-3, 2019

Specht Cezary, Dąbrowski Paweł S., Pawelski Jan, Specht Mariusz, Szot Tomasz, Comparative analysis of positioning accuracy of GNSS receivers of Samsung Galaxy smartphones in marine dynamic measurements, Advances in Space Research, 0273-1177, 10.1016/j.asr.2018.05.019, 2019

Specht Mariusz, Specht Cezary, Wąż Mariusz, Dąbrowski Paweł, Skóra Marcin, Marchel Łukasz, Determining the variability of the territorial sea baseline on the example of waterbody adjacent to the municipal beach in Gdynia, Applied Sciences, 2076-3417, 10.3390/app9183867, 2019

Specht Cezary, Szot Tomasz, Specht Mariusz, Dąbrowski Paweł, Selected aspects of testing the positioning accuracy of GNSS receivers used in sports and recreation by dynamic measurements, Baltic Journal of Health and Physical Activity, 2080-1297, 10.29359/BJHPA.11.2.08, 2019

Dąbrowski Paweł, Accuracy of geopotential models used in smartphone positioning in the territory of Poland, IOP Conference Series: Earth and Environmental Science, 1755-1307, 10.1088/1755-1315/221/1/012080, 2019

Specht Cezary, Pawelski Jan, Smolarek Leszek, Specht Mariusz, Dąbrowski Paweł, Assessment of the positioning accuracy of DGPS and EGNOS systems in the Bay of Gdansk using maritime dynamic measurements, JOURNAL OF NAVIGATION, 0373-4633, 10.1017/S0373463318000838, 2019

Dąbrowski Paweł, Specht Cezary, Spatial expansion of the symmetrical objects point clouds to the lateral surface of the cylinder – mathematical model, MEASUREMENT, 0263-2241, 10.1016/j.measurement.2018.10.036, 2019

Szot Tomasz, Specht Cezary, Specht Mariusz, Dąbrowski Paweł S., Comparative analysis of positioning accuracy of Samsung Galaxy smartphones in stationary measurements, Plos One, 10.1371/journal.pone.0215562, 2019

Specht Cezary, Smolarek Leszek, Pawelski Jan, Specht Mariusz, Dąbrowski Paweł, Polish DGPS system: 1995-2017 - study of positioning accuracy, Polish Maritime Research, 1233-2585, 10.2478/pomr-2019-0021, 2019

Wilk Andrzej, Specht Cezary, Koc Władysław, Karwowski Krzysztof, Chrostowski Piotr, Szmagliński Jacek, Dąbrowski Paweł, Specht Mariusz, Judek Sławomir, Skibicki Jacek, Skóra Marcin, Grulkowski Sławomir, Projekt badawczy BRIK: Opracowanie innowacyjnej metody wyznaczania precyzyjnej trajektorii pojazdu szynowego; Research project BRIK: development of an innovative method for determining the precise trajectory of a railway vehicle, Przegląd Komunikacyjny, 0033-2232, 2019

Dąbrowski Paweł S., Specht Cezary, Koc Władysław, Wilk Andrzej, Czaplewski Krzysztof, Karwowski Krzysztof, Specht Mariusz, Chrostowski Piotr, Szmagliński Jacek, Grulkowski Sławomir, Installation of GNSS receivers on a mobile railway platform - methodology and measurement aspects, Scientific Journals of the Maritime University of Szczecin, 1733-8670, 10.17402/367, 2019

Specht Cezary, Specht Mariusz, Dąbrowski Paweł S., Polish DGPS system: 1995-2018 - studies of reference station operating zones, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.13.03.13, 2019

Czaplewski Krzysztof, Specht Cezary, Dąbrowski Paweł, Specht Mariusz, Wiśniewski Zbigniew, Koc Władysław, Wilk Andrzej, Karwowski Krzysztof, Chrostowski Piotr, Szmagliński Jacek, Use of a least squares with conditional equations method in positioning a tramway track in the Gdansk agglomeration, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.13.04.25, 2019

Specht Cezary, Specht Mariusz, Dąbrowski Paweł, Comparative analysis of active geodetic networks in Poland, 17th International Multidisciplinary Scientific GeoConference SGEM 2017; conference proceedings, volume 17 : Geodesy and mine surveying. Informatics, geoinformatics and remote sensing, issue 22, 29 June - 5 July, 2017, Albena, Bulgaria, STEF92 Technology Ltd., Sofia, s. 163, 978-619-7408-02-7, 10.5593/sgem2017/22/S09.021, 2017

Specht Cezary, Weintrit Adam, Specht Mariusz, Dąbrowski Paweł, Determination of the territorial sea baseline – measurement aspect, IOP Conference Series: Earth and Environmental Science, 1755-1307, 10.1088/1755-1315/95/3/032011, 2017

Specht Cezary, Dąbrowski Paweł, Runaway PRN11 GPS satellite, The 10th International Conference Environmental Engineering; 10th ICEE : selected papers, April 27-28, 2017 Vilnius, Lithuania, Vilnius Gediminas Technical University Press Technika, Wilno, art. no. UNSP enviro.2017.244, s. 1, 10.3846/enviro.2017.244, 2017

Dąbrowski Paweł, Specht Cezary, Specht Mariusz, Chrostowski Piotr, Dera Marcin, Koc Władysław, Szmagliński Jacek, Skóra Marcin, Mobilne pomiary satelitarne na liniach Pomorskiej Kolei Metropolitalnej; Mobile satellite measurements on the Pomeranian Metropolitan Railway, Przegląd Komunikacyjny, 0033-2232, 2016

Dąbrowski Paweł, Specht Cezary, Dumalski A., Hejbudzka K., Modeling 3D objects for navigation purposes using laser scanning, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.10.02.12, 2016

Specht Mariusz, Weintrit Adam, Dąbrowski Paweł, Specht Cezary, Wyznaczanie linii podstawowej i zewnętrznej granicy morza terytorialnego – aspekt metodyczny; Determination of the baseline and outer limit of the territorial sea – methodical aspect, Zeszyty Naukowe Akademii Morskiej w Gdyni, 1644-1818, 2016

dr Sławomir Zblewski

Specht C., Lewicka O., Specht M., Zblewski S., Impact of hydrotechnical structures on forming the tombolo oceanographic phenomenon in Kołobrzeg and Sopot, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.15.03.25, 2021

mgr Oktawia Lewicka

Dąbrowski Pawel S., Specht Cezary, Specht Mariusz, Burdziakowski Paweł, Makar Artur, Lewicka Oktawia, Integration of multi-source geospatial data from GNSS Receivers, terrestrial laser scanners, and unmanned aerial vehicles; Intégration de données géospatiales multi-sources provenant de récepteurs GNSS, de lasers à balayage terrestres et de drones, Canadian Journal of Remote Sensing, 0703-8992, 10.1080/07038992.2021.1922879, 2021

Specht Mariusz, Stateczny Andrzej, Specht Cezary, Widźgowski Szymon, Lewicka Oktawia, Wiśniewska Marta, Concept of an innovative autonomous unmanned system for bathymetric monitoring of shallow waterbodies (INNOBAT System), Energies, 1996-1073, 10.3390/en14175370, 2021

Specht Mariusz, Specht Cezary, Stateczny Andrzej, Marchel Łukasz, Lewicka Oktawia, Paliszewska-Mojsiuk Monika, Wiśniewska Marta, Determining the seasonal variability of the Territorial Sea Baseline in Poland (2018-2020) using integrated USV/GNSS/SBES measurements, Energies, 1996-1073, 10.3390/en14092693, 2021

Stateczny Andrzej, Specht Cezary, Specht Mariusz, Brčić David, Jugović Alen, Widźgowski Szymon, Wiśniewska Marta, Lewicka Oktawia, Study on the positioning accuracy of GNSS/INS systems supported by DGPS and RTK receivers for hydrographic surveys, Energies, 1996-1073, 10.3390/en14217413, 2021

Lewicka Oktawia, Specht Mariusz, Stateczny Andrzej, Specht Cezary, Brčić David, Jugović Alen, Widźgowski Szymon, Wiśniewska Marta, Analysis of GNSS, hydroacoustic and optoelectronic data integration methods used in hydrography, SENSORS, 1424-8220, 10.3390/s21237831, 2021

Specht C., Lewicka O., Specht M., Zblewski S., Impact of hydrotechnical structures on forming the tombolo oceanographic phenomenon in Kołobrzeg and Sopot, TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation, 2083-6473, 10.12716/1001.15.03.25, 2021

Specht Mariusz, Specht Cezary, Dąbrowski Paweł, Czaplewski Krzysztof, Smolarek Leszek, Lewicka Oktawia, Road tests of the positioning accuracy of INS/GNSS systems based on MEMS technology for navigating railway vehicles, Energies, 1996-1073, 10.3390/en13174463, 2020

Specht Cezary, Lewicka Oktawia, Specht Mariusz, Dąbrowski Paweł, Burdziakowski Paweł, Methodology for carrying out measurements of the tombolo geomorphic landform using Unmanned Aerial and Surface Vehicles near Sopot pier, Poland, Journal of Marine Science and Engineering, 2077-1312, 10.3390/jmse8060384, 2020

Specht Mariusz, Specht Cezary, Lewicka Oktawia, Makar Artur, Burdziakowski Paweł, Dąbrowski Paweł, Study on the coastline evolution in Sopot (2008-2018) based on Landsat satellite imagery, Journal of Marine Science and Engineering, 2077-1312, 10.3390/jmse8060464, 2020

Makar Artur, Specht Cezary, Specht Mariusz, Dąbrowski Paweł, Burdziakowski Paweł, Lewicka Oktawia, Seabed topography changes in the Sopot pier zone in 2010-2018 influenced by tombolo phenomenon, SENSORS, 1424-8220, 10.3390/s20216061, 2020

Burdziakowski Pawel, Specht Cezary, Dabrowski Pawel S., Specht Mariusz, Lewicka Oktawia, Makar Artur, Using UAV photogrammetry to analyse changes in the coastal zone based on the Sopot tombolo (salient) measurement project, SENSORS, 1424-8220, 10.3390/s20144000, 2020

Podmiot udostępniający: 

WN

Wytworzył informację:

O.Lewicka
10.11.2021