BazTech - Yadda

1

Wykorzystanie informacji na temat aktywności użytkownika do zwiększenia dokładności w ultraszerokopasmowym systemie lokalizacyjnym

Mandecki Krystian, Kołakowski Marcin

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

|

2023

|

nr 4

212--215

PL

W referacie zaprezentowano metodę lokalizacji przeznaczoną do wykorzystania w ultraszerokopasmowym systemie lokalizacyjnym. Metoda, oprócz prowadzenia pomiarów w interfejsie radiowym, zakłada ciągłe monitorowanie aktywności użytkownika co, w połączeniu z informacją na temat rozkładu pomieszczenia, pozwala uzyskać dodatkowy kontekst. W zaproponowanej metodzie, użytkownik jest lokalizowany za pomocą filtru cząsteczkowego. Dodatkowy kontekst jest wykorzystywany na etapie ponownego próbkowania poprzez zwiększenie wag cząsteczek znajdujących się w obszarach, w których można wykonywać wykrytą aktywność.

EN

The paper presents a localization method intended for use in an ultra-wideband positioning system. The method, besides performing measurements in the radio interface, monitors the user’s activity, which combined with the indoor area layout results in an additional positioning context. In the proposed method, the user is located using a particle filter. The additional context is used to increase the weights of particles located in the areas, where the detected activity can be performed.

2

Decymetry dla każdego

Królikowski Jerzy

Geodeta : magazyn geoinformacyjny

|

2023

|

nr 4

54--55

3

Train detection methods as the foundation of positioning systems of railroad traffic control

Steuer Michał, Krzykawski Martin, Simiński Dawid, Chema Wongelawit, Burdzik Rafał

Diagnostyka

|

2023

|

Vol. 24, No. 3

art. no. 2023305

EN

Detection of the current location of rail vehicles in the railway infrastructure network determines the safety, efficiency and reliability of rail transport. In addition, it indirectly affects the safety at rail-road crossings, i.e. also the BRD (Road Safety). In terms of efficiency and reliability of transport systems, the ability to detect a moving vehicle can improve the effective capacity of railway lines. As in the case of technical diagnostics, effective recognition of the current state of the transport network determines the efficiency of the transport system. The development of railways, with particular emphasis on high-speed railways, makes it necessary to modernize and improve railway traffic control devices and systems. A special area of development, ensuring the safe and effective use of rail transport, is the detection and location of rail vehicles moving on the railway infrastructure. The ability to determine the precise location of a rail vehicle is a key element in the reliable operation of rail transport. Therefore, in the field of devices and systems for the detection and location of rail vehicles, many studies and analyzes are carried out to develop existing or create new solutions dedicated to positioning rail vehicles.

4

Research on GNSS positioning and applications in Poland in 2019–2022

Paziewski Jacek, Hadas Tomasz, Rohm Witold, Wielgosz Paweł

Advances in Geodesy and Geoinformation

|

2023

|

Vol. 72, no. 2

art. no. e43, 2023

EN

This paper reviews the key studies concerning GNSS positioning and applications conducted at leading Polish research institutions from 2019 until 2022. The review also constitutes a contribution to the national report of Poland for the International Union of Geodesy and Geodynamics (IUGG) presented at the 28th General Assembly of IUGG held in 2023 in Berlin, Germany. In particular, we discuss the advances in theory and applications of relative and absolute positioning, troposphere and ionosphere sounding, smartphone and low-cost GNSS data processing, and other specific studies such as those on satellite antenna calibration and clock stability. In light of these recent advances by the Polish scientific community, continuous progress in GNSS theory and processing algorithms is thought to be maintained in the future, and GNSS applications are expected to continue to proliferate.

5

Realizacja układu do pomiaru wpływu poziomu zurbanizowania terenu na jakość wyznaczania pozycji w systemie GPS

Bielawski Antoni, Lazarowska Agnieszka

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

|

2022

|

Nr 75

9--12

PL

W artykule zaprezentowano projekt układu do rejestrowania położenia bezwzględnego z wykorzystaniem systemu GPS, który umożliwił przeprowadzenie badań nad wpływem poziomu zurbanizowania terenu na jakość wyznaczania pozycji. W tym celu dokonano rejestracji położenia w dwóch miejscach, w terenie zurbanizowanym oraz w dwóch w terenie niezurbanizowanym. Następnie dokonano analizy wyników w oparciu o parametr HDOP (ang. Horizontal Dilution Of Precision – współczynnik geometrycznej dokładności w płaszczyźnie poziomej) oraz liczbę widocznych satelitów.

EN

The article presents the design of the absolute position recording system with the use of the GPS system, which made it possible to conduct research on the influence of the level of urbanization of the area on the quality of determining the position. For this purpose, position registration was made in two places in urbanized areas and in two in non-urbanized areas. Then, the results were analyzed based on the HDOP (Horizontal Dilution of Precision) parameter and the number of visible satellites.

6

Architecture of positioning and tracking solutions for maritime applications

Ilcev S.D.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

|

2022

|

Vol. 16 No. 3

481--489

EN

This paper discusses the current and new satellite transponders for global tracking and detecting of oceangoing ships, assets, crew, passengers and any moving objects at sea for enhanced vessels traffic control and management. These transponders are able to monitor all maritime assets and to improve safety, security of movements and collision avoidance, especially during very bad weather conditions and visibility. By deployment of the Global Navigation Satellite System (GNSS) in integration with Inmarsat, Iridium and other satellite systems in one unit with antenna, it is possible to provide reliable positioning and tracking solutions for civilian maritime, other mobiles and personnel at different Radio Frequency (RF) bands. The existing and forthcoming space and ground segment for positioning and tracking solutions as a modern Satellite Asset Tracking (SAT) onboard ships, and other relating systems are discussed and benefits of these new technologies and solution for improved positioning and tracking are explored.

7

Ranging and Positioning Accuracy for Selected Correlators under VHF Maritime Propagation Conditions

Bronk Krzysztof, Januszewska Magdalena, Koncicki Patryk, Lipka Adam, Niski Rafał, Wereszko Błażej

Journal of Telecommunications and Information Technology

|

2022

|

nr 3

3--15

EN

The article presents an analysis of the features of selected correlators impacting the accuracy of determining the receiver’s range and position in VHF marine environment. The paper introduces the concept of various correlators – including the double delta correlator – and describes the proposed measurement scenarios that have been designed to demonstrate the effectiveness of those components. The entire work was performed as part of the R-Mode Baltic and R-Mode Baltic 2 projects, with our goals including analyzing the impact of multipath phenomena, changes in the sampling frequency or Signac type on the determination of the received signal delay at the receiver. The measured data were processed in a signal correlation application and in a TOA-based tool in order to determine the receiver’s position. This process made it possible to compare the selected correlating devices. The results presented in this article are to be used by IALA in developing a current version of the VHF data exchange system’s (VDES) specification.

8

PPK czy RTK?

Królikowski Jerzy

Geodeta : magazyn geoinformacyjny

|

2022

|

nr 5

28--29

9

Dokładnie, choć na oko?

Królikowski Jerzy

Geodeta : magazyn geoinformacyjny

|

2022

|

nr 12

28--30

10

Aging of ground Global Navigation Satellite System oscillators

Maciuk Kamil

Eksploatacja i Niezawodność

|

2022

|

Vol. 24, no. 2

371--376

EN

Global Navigation Satellite System (GNSS) are widely used in many areas of human life and activity. The proper functioning of GNSS systems depends on several factors, the most important of which is the correct knowledge of time. The position indirectly is based on the knowledge of the distance, which is determined based on time with the knowledge of the speed of the electromagnetic wave. Thus, proper (accurate) knowledge of time (GNSS clock stability) is a key to precise positioning. In this text, the long-term stability of the GNSS station clocks covering the years 1994-2020 was analysed. For this purpose, the corrections of the clocks at selected permanent stations were used, and their stability was determined for all years separately. Then the change of clock stability over time and the search for correlation were analysed. As the results showed, there are clearly differences between four of the type of oscillators analysed. In case of the comparison on an annual basis, no change over time was found.

11

Research on the intelligent positioning method of tunnel excavation face

Zhang Jiesheng, Qi Yongzheng

Archives of Civil Engineering

|

2022

|

Vol. 68, nr 1

431--441

EN

Tunnel construction survey must be necessary to be very quick so that the results can be known as soon as possible. This aim can be achieved through the intelligent positioning method of tunnel excavation face. In this study, the plane parameters of the tunnel cross-section were transformed into the coordinates of the points on the cross-section to realize the automatic transformation of graphic data. According to the theoretical calculation of the lofting point accuracy, the appropriate measurement control network level and measurement accuracy and the appropriate measurement instruments were selected. The fast and intelligent positioning and setting out of tunnel excavation face was realized base on the technology of data communication between computer and measuring instruments. The intelligent positioning method of tunnel excavation face could greatly reduce the time of measurement and positioning, speed up the project progress, reduce the project risk, shorten the construction period and reduce the project cost.

12

Improved rack and pinion drive

Sawicki Tadeusz

Technical Transactions

|

2021

|

Vol. 118, iss. 1

art. no. e2021013

EN

A typical rack and pinion drive set is comprised of a rack and a pinion. There is an inter-tooth clearance between the mating teeth of the rack and the pinion, which has advantages and disadvantages. The disadvantage of this clearance is the errors that occur in the positioning of the machine tool during set-up. Elimination of clearance between teeth is possible by using a pinion drive with two pinions. This ensures continuous contact between the teeth, regardless of the direction of machine movement. These are found on new machines, while older machines do not have such a solution. This paper presents a solution with two pinions, which can be used in such older machines and which makes it possible to achieve qualitative parameters that were not possible before.

13

Positioning of the Amalgamated Territorial Communities of Ukraine through the Sustainable Development in the Conditions of Military Actions

Budnikevich Iryna, Kolomytseva Olena, Rohozian Yuliia, Krupenna Inga, Zablodska Daria

Problemy Ekorozwoju

|

2021

|

Vol. 16, nr 1

103--112

EN

The article summarizes and analyses the scientific approaches to the determination and systematization of the positioning parameters of local level territories. The authors determined and systematized the positioning parameters of the amalgamated territorial communities in Ukraine through the prism of sustainable development elements in the conditions of military operations to form the most effective position of a particular community among other administrative-territorial units of the first level. Based on the results of the analysis of the positioning status in Ukraine, the Ukrainian regions were clustered by the number of ATCs that determined the direction of positioning. It is proved that each of the ATC deserves a worthy positioning of its territory in the eyes of the key stakeholders of its development. However, the communities of precisely Donets`k and Luhans`k regions will do just that, since they continue to receive losses from hostilities unfolding nearby.

PL

Artykuł analizuje naukowe podejście do określania i systematyzacji parametrów pozycjonowania terytoriów na poziomie lokalnym. Autorzy określili i usystematyzowali parametry pozycjonowania połączonych społeczności terytorialnych na Ukrainie przez pryzmat elementów zrównoważonego rozwoju w warunkach operacji wojskowych. Celem było stworzenie najbardziej efektywnej pozycji określonej społeczności wśród innych jednostek administracyjno-terytorialnych pierwszego poziomu. Na podstawie wyników analizy statusu pozycjonowania na Ukrainie, regiony ukraińskie zostały zgrupowane według liczby ATC, które określiły kierunek pozycjonowania. Udowodniono, że każdy ATC zasługuje na godne pozycjonowanie swojego terytorium w oczach kluczowych interesariuszy jego rozwoju. Jednakże społeczności w regionach Doniecka i Ługańska dopiero tego dokonają, ponieważ nadal notują straty wynikające z działań wojennych rozgrywających się w pobliżu.

14

Problems with positioning inland vessels on the Western Oder River section between the Długi and the Kolejowy Bridges in Szczecin

Kujawski Artur

Zeszyty Naukowe Akademii Morskiej w Szczecinie

|

2020

|

nr 61 (133)

48--54

EN

The main aim of this article is to present a method to process Inland AIS (automatic identification system) data that is part of RIS (river information services), as well as to synthesize and visualize information obtained from it for further analysis. This article presents problems with imaging the position of inland navigation units in the immediate vicinity of the Długi and Kolejowy Bridges in Szczecin. The passing of 80 inland units on this section of the Western Oder River was analyzed. Data were obtained from the AIS message database and industrial cameras of the RIS Monitoring Centre at the Inland Navigation Office in Szczecin. 35 units were equipped with AIS messaging devices. This article analyzed the data after previous processing, which consisted of selecting appropriate research units and decoding AIS messages recorded in the VDM message type (VHF Data Link Message). Then, the acquired positions of inland navigation units on the map were visualized to calculate the number of errors and their location. The obtained data were used to illustrate the locations of interference during the operation of transmitter-receiver equipment that prevented determining the exact position of inland navigation units in the immediate vicinity of the above-mentioned bridges.

15

Reconstruction of geomagnetic event as observed in Northern Adriatic region and Its correlation with GPS single-frequency positioning deviations

Brčić D., Ćelić J., Valčić S.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

|

2020

|

Vol. 14, no. 2

349--357

EN

Space weather effects are generally recognized as causes of degradation of satellite positioning, navigation and timing (PNT) services. We analyze GPS position estimation error during a geomagnetic storm, focusing on manifestations of geomagnetic processes. The position estimation error was analyzed in terms of GPS coordinates’ deviations (latitude, longitude and height) from their reference values. The storm’s impact was studied in the Northern Adriatic region where GPS observables from two Global Navigation Satellite System (GNSS) reference stations were analysed. Geomagnetic indices were elaborated, comprising readings from interplanetary, magnetospheric and geomagnetic observatories. Total Electron Content (TEC) on both stations was computed using dual frequency GPS pseudorange observables. The experiment was to reconstruct the movement of geomagnetic disturbances entering the geospace, reaching the earth’s surface. The aim was to correlate possible space weather manifestation on satellite positioning performance in terms of positioning error. Regularities in changes in positioning deviations were identified with relation to influential indices. The research offered a possibility of experimental positioning deviations assessment as well as forecasting. Evaluation of generated rudimentary Classification and Regression Trees (CART) models showed that the risk of satellite positioning errors could be assessed and predicted considering absolutes, as well as changes in values of geomagnetic indices. During the research process, several activities emerged as preferable continuation of the work, with the aim of further development of predictive models and the complement of space weather scenarios and their consequences on navigational systems. Along with summarized results, they are outlined in the conclusion section.

16

Availability of maritime radio beacon signals for R-Mode in the Southern Baltic Sea

Gewies S., Grundhöfer L., Hehenkamp N.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

|

2020

|

Vol. 14, no. 1

170--163

EN

This paper presents an overview of the development of a terrestrial positioning system called Ranging Mode (R-Mode) in the Southern Baltic Sea region which utilizes already existing maritime radio infrastructure. Here, an R-Mode testbed is planned to be set up until 2020 that meets maritime user needs for resilient PNT. First measurements of radio beacon signals on-board a vessel sailing in the Southern Baltic Sea show the good availability of beacon signals in this region. A comparison of received signals with a coverage prediction based on the nominal range of radio beacons shows the shortcoming of this approach and emphasizes the need for more elaborated coverage predictions which consider all effects of medium frequency wave propagation at day and night. In the measurements results the skywave has a major impact on the beacon signal stability in the night. The time stability of the signal amplitude seems to be a good indicator for disturbed reception conditions.

17

Analysis of tropospheric contribution to GPS positioning error during tropospheric cyclone Marcus in 2018

Sikirica N., Horvat M., Špoljar D., Rumora I.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

|

2020

|

Vol. 14, no. 2

343--348

EN

GNSS positioning performance assessment is essential for sustainable development of a growing number of GNSS-based technology and socio-economic applications. Case-studies of GNSS positioning performance in critical environments and applications scenarios reveals vulnerabilities of the GNSS Positioning, Navigation, and Timing (PNT) services, and suggest mitigation techniques and GNSS application risk containment. Here we address the case of GPS positioning performance during a devastating tropical cyclone Marcus that hit the greater area of the city of Darwin, Australia in 2018. We identified specific statistical properties of time series of tropospheric contribution to GPS northing, easting, and vertical positioning error that may contribute to understanding of tropospheric effects on GPS positioning performance during a massive weather deterioration in maritime and coastal areas, and analysed their adversarial effects on GNSS-based maritime applications.

18

Lokalizacja terminala ruchomego w korytarzu przy użyciu kabli promieniujących

Błaszkiewicz Olga, Sadowski Jarosław, Stefański Jacek

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

|

2020

|

nr 7-8

306--311, CD

PL

W referacie przedstawiono wyniki testów możliwości określania położenia terminala ruchomego wzdłuż korytarza na podstawie propagacji sygnałów w kablach promieniujących w dwóch kierunkach. Opisane zostało stanowisko pomiarowe oraz wyniki uzyskane przy różnych sposobach wytwarzania sygnałów pomiarowych w instalacji jedno- i dwuprzewodowej.

EN

This paper presents results of tests on the possibility to estimate position of mobile terminal along corridor using signals transmitted in radiating cable in two directions. The construction of a measurement stand is described with results obtained using different method of positioning signals generation in one and two-cable scenarios.

19

Electromechanical positioning system with a neuro-fuzzy corrector

Paranchuk Yaroslav, Evdokimov Pavlo, Kuznyetsov Oleksiy

Przegląd Elektrotechniczny

|

2020

|

R. 96, nr 9

52--55

EN

Triple-loop elecromechanical positioning system with neuro-fuzzy corrector of position controller was developed. The structure of the neuro-fuzzy corrector has been grounded and the corrector itself has been designed. A computer Simulink model of a triple-loop two-mass positioning system has been developed. Statics and dynamics of the positioning process in a full range of reference signals and disturbances has been examined. The results of computer simulations demonstrate that the developed positioning system allows implementing optimal laws of actuator’s motion, and required positioning accuracy in a full range of reference signals and disturbances.

PL

Przedstawiono elektromechaniczny system pozycjonowania ze sterowanie wykorzystującym logikę rozmytą. Przeprowadzono symulację układu i analizę właściwości statycznych i dynamicznych. Analizowano treż wpływ zakłóceń.

20

The influence of the data packet size on positioning parameters of UWB system for the purpose of tagging smart city infrastructure

Hanzel K., Paszek K., Grzechca D.

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2020

|

Vol. 68, nr 4

857--868

EN

The paper presents a concept of the vehicle/road infrastructure in vehicle-to-infrastructure (V2I) communication for tagging and informing vehicles about the surrounded environment. A frame analysis and the influence of the data packet size on Ultra-wideband (UWB) were investigated. The authors have determined the distance that could be traveled by a vehicle at the given speed in relation to the amount of data that has to be transmitted during the ranging procedure. The authors propose a data frame format (using the IEEE 802.15.4a protocol) for coding/encoding the information about the road infrastructure efficiently during the positioning procedure. It affects to minimum the time that is required to exchange messages during the ranging and communication process. The whole system is an efficient and reliable element that enhances/extends the existing components of advanced driver-assistance systems (ADAS), which will facilitate validation of the information obtained from devices such as lidar, radar or video. The impact of the transmitted payload to the distance traveled by car opens the door to future research on the possibility of implementing efficient vehicle-to-vehicle (V2V) communication for autonomous driving or and other smart city solutions.