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Tytuł:
GNSS frequencies, signals, receiver capabilities and applications
Autorzy:
Januszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/135034.pdf
Data publikacji:
2018
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
GNSS
GNSS receiver
GNSS frequency
GNSS signals
GNSS receiver capabilities and applications
Opis:
Nowadays (August 2017) position data can be obtained generally from satellite navigation systems (SNS), such as GPS and GLONASS, and satellite based augmentation systems (SBAS) which can be either global, such as EGNOS, GAGAN, MSAS and WAAS, or regional, such as NAVIC (IRNSS) in India. Two new global SNSs, Galileo and BeiDou, three new global SBASs, SDCM, KASS and SNAS, and one new regional SBA, QZSS in Japan, are under construction. The generic name given to all these abovementioned systems is GNSS (Global Navigation Satellite Systems). This paper presents details of the following: changes that have occurred in the cumulative core revenue in different GNSS market segments (road, Location Based Service LBS, surveying, agriculture, timing & synchronization, aviation, maritime, drones and rail in 2017) in the last 8 years; an overview of the GNSS industry and location-based services in the world; details of current and future GNSS market evolution; GNSS unit shipments in 13 different categories of maritime application; the frequency and constellation capabilities of GNSS receivers; GNSS frequencies that will be common in the future; the adoption of multi-constellation, multi-frequency and dual-frequency as key enablers of improved accuracy and integrity; GNSS services available for civil and authorized users, and multiple signals in the case of all four global SNSs.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 54 (126); 57-62
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applications of global navigation satellite systems in maritime navigation
Autorzy:
Januszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/135402.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
GNSS
GPS system
GNSS receiver
shipborne GPS and GNSS receiver
type of GPS and GNSS receivers
maritime navigation
Opis:
Currently (April 2016) uninterrupted information about a ship’s position can be obtained from specialized electronic position-fixing systems, in particular, Satellite Navigation Systems (SNSs) such as GPS and GLONASS and Satellite Based Augmentation Systems (SBASs) such as EGNOS or WAAS. The generic name given to all the above mentioned systems is Global Navigation Satellite Systems (GNSS). Many models, designed for the ship’s bridge and provided by about a dozen manufacturers, are available on the world market. In Europe, one of the most comprehensive sources of knowledge on the global GNSS market is a report published, on average, every 15 months by the European GNSS Agency GSA. Another receiver survey is published each year in the January number of the magazine “GPS World”. The detailed analysis of market report and receiver survey, possible use of EGNOS and Galileo in the maritime market, and different maritime applications of GNSS equipment are described in this paper.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 47 (119); 74-79
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wpływu interferencji w postaci sygnału szerokopasmowego na dokładność wyznaczania pozycji obiektów BSP
Impact assessment signal interference in the form of broadband on accuracy of determining positions of objects UAV
Autorzy:
Komorek, A.
Bieńczak, R.
Kowalik, R.
Powiązania:
https://bibliotekanauki.pl/articles/311076.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
bezzałogowy statek powietrzny
BSP
odbiornik GNSS
sygnał szerokopasmowy
analiza matematyczna
unmanned aircraft
GNSS receiver
broadband signals
mathematical analysis
Opis:
W artykule omówiono analizę matematyczną wpływu sygnału szerokopasmowego na poprawne funkcjonowanie odbiornika nawigacji satelitarnej GNSS znajdującego się na wyposażeniu bezzałogowego statku powietrznego BSP. Zaprezentowane w artykule modele matematyczne poddano badaniom symulacyjnym, a uzyskane na tym etapie wyniki zaprezentowano w postaci charakterystyk szumowych (BER). Jakkolwiek przedstawione w referacie wyniki odnoszą się do konkretnego odbiornika GNSS, stąd mogą się one różnić w zależności o rodzajów radiowych urządzeń nawigacyjnych.
The article discusses the mathematical analysis of the impact of broadband signal on the proper functioning of the GNSS receiver located supplied unmanned aircraft BSP. Presented in this paper mathematical models were tested simulation, and from this step results presented in the form of noise characteristics (BER). Although the results presented in this paper relate to specific GNSS receiver, so they can vary depending on the type of radio navigation equipment.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 915-920
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New threat to global transport. GNSS receiver spoofing
Autorzy:
Gucma, M.
Powiązania:
https://bibliotekanauki.pl/articles/224112.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
GNSS Receiver
Global Navigation Satellite System
signal spoofing
anti-spoofing technique
global transport
threats
GNSS
komunikacja globalna
zagrożenia
Opis:
Transport and logistics in XXI century relies on the several technical systems for assuring safe and reliable operations. One of widely used systems are satellite positioning systems, used to monitoring transport means and cargo itself. Reliability of the whole transport chain is often combined with singular reliability of satellite monitoring system. Possible threats to precise positioning of any vehicle is GNSS (Global Navigation Satellite System) deliberate interference. So called spoofing interference can mislead receiver in transport objective for reporting entirely wrong position and timing. To fight with this phenomena’s antispoofing techniques are developed. This paper will provide a review of late researches in field of GNSS anti-spoofing on the side of receiver. GNSS receiver vulnerabilities for a spoofer (device) attack will be presented as well as anti-spoofing algorithms. Possible limitation, costs as well as countermeasures methods will be shown thoroughly. Some of recent trends in anti-spoofing techniques in the world will be outlined up to date.
Źródło:
Archives of Transport; 2015, 35, 3; 7-14
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Foundations of GNSS spoofing detection and mitigation with distributed GNSS SDR receiver
Autorzy:
Filić, M.
Powiązania:
https://bibliotekanauki.pl/articles/117522.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
positioning
Navigation and Timing (PNT)
cyber attack
Spoofing Detection and Mitigation (SDM)
GNSS SDM
spoofing
GNSS receiver
GNSS spoofing attack
Opis:
GNSS spoofing is an intentional and malicious action aimed at degrading and suppressing GNSS Positioning, Navigation, and Timing (PNT) services. Since it affects data and information segment of GNSS, it is considered a GNSS information (cyber‐) security attack. Considering a significant and powerful threat, GNSS spoofing should be treated seriously to avoid damage and liabilities resulting from disruptions of GNSS PNT services. Here the GNSS position estimation procedure is examined for potential vulnerabilities, and the nature of and motivation for GNSS spoofing attacks exloiting the vulnerabilities assessed. A novel GNSS Spoofing Detection and Mitigation (GNSS SDM) method is proposed within the established computational and communication infrastructure, that allows for successful overcoming and classification of GNSS spoofing attacks. Proposed method is applicable without requirements for core GNSS modification, and leaves majority of user equipment easily transferable to the GNSS spoofing‐free environment. Potential GNSS spoofing effects and GNSS anti‐spoofing opportunities in maritime sector were given a particular attention.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 4; 649-656
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An SDR-based Study of Multi-GNSS Positioning Performance During Fast-developing Space Weather Storm
Autorzy:
Filić, M.
Filjar, R.
Ruotsalainen, L.
Powiązania:
https://bibliotekanauki.pl/articles/117597.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
utilization of GNSS
Global Positioning System (GPS)
GLONASS
RTKLIB
multi-GNSS
space weather storm
GNSS SDR Receiver
Opis:
The understanding of the ionospheric effects on GNSS positioning performance forms an essential pre-requisite for resilient GNSS development. Here we present the results of a study of the effects of a fast-developing space weather disturbance on the positioning performance of a commercial-grade GPS+GLONASS receiver. Using experimentally collected pseudoranges and the RTKLIB, an open-source software-defined GNSS radio receiver operating in the simulation mode, we assessed GNSS positioning performance degradations for various modes of GNSS SDR receiver operation, and identified the benefits of utilisation of multi-GNSS and ionospheric error correction techniques.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 395-400
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low bandwidth network-RTK correction diissemination for high accuracy maritime navigation
Autorzy:
Alissa, S.
Håkansson, M.
Henkel, P.
Mittmann, U.
Hüffmeier, J.
Rylander, R.
Powiązania:
https://bibliotekanauki.pl/articles/1841552.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
real time kinematic
high accuracy maritime navigation
network-RTK
Global Navigation Satellite System
VHF data exchange system
GNSS receiver
virtual reference station
physical reference stations
Opis:
More than half of the incidents reported to EMSA relate to nautical events such as collision, groundings and contacts. Knowledge of accurate and high-integrity positioning is therefore not only a need for future automated shipping but a base for today’s safe navigation. Examples on accidents include Ever Given in the Suez Canal and HNoMS Helge Ingstad in Norway. A Network-RTK (NRTK) service can be used as an augmentation technique to improve performance of shipborne GNSS receivers for future positioning of manned and unmanned vessels in restricted areas, such as port areas, fairways, and inland water ways. NRTK service providers generate RTK corrections based on the observations of networks of GNSS reference stations which enables the users to determine their position with centimeter accuracy in real-time using a shipborne GNSS receiver. Selection of appropriate communication channels for dissemination of NRTK corrections data is the key to a secure positioning (localization) service. In PrePare-Ships project, the modern maritime communication system VDES (VHF Data Exchange System) is proposed to distribute SWEPOS (NRTK in Sweden) correction data to shipborne positioning modules. VDES is a very reliable technique and it is compatible with most onboard functionalities. In order to minimize the impact on the overall VDES data capacity in a local area, NRTK correction data shall only occupy a single VDES slot with a net capacity of 650 bytes. Update rates may vary but are preferably at 1Hz. However, NRTK correction data size changes instantly, depending on the number of visible GNSS satellites, and the data rate can therefore sometimes reach in excess of 1000 byte/s. In this study, a smart technique is proposed to reduce size of NRTK correction data to instantly adapt with the VDES requirements by choosing a combination of specific signals, satellites or even constellations such that the data rate is not more than 650 byte/s, and at the same time it achieves optimal positioning performance with the accuracy required by the PrePare-Ships project application.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 1; 171-179
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling GPS positioning performance in Northwest Passage during extreme space weather conditions
Autorzy:
Špoljar, D.
Jukić, O.
Sikirica, N.
Lenac, K.
Filjar, R.
Powiązania:
https://bibliotekanauki.pl/articles/1841553.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Positioning System
Northwest Passage
Global Navigation Satellite System
Software Defined Radio (SDR)
GNSS SDR Receiver
GPS Position
Opis:
New shipping routes are emerging as a result of iceberg melting in polar regions, allowing for more efficient transport of people and goods. Opening of the Northwest Passage, the maritime route connecting Pacific Ocean with Atlantic Ocean through Arctic region, is considered such a development. The increasing transport exploitation of the Northwest Passage requires the quality assessment of maritime navigation aids for compliance with the established requirements. Here we contribute to the subject with addressing the polar commercial-grade GPS positioning performance in the Northwest Passage in the extreme positioning environment conditions during the massive 2003 space weather storm, a space weather event similar to the Carrington Storm of 1859, the largest space weather event recorded. The GPS positioning environment in the Northwest Passage during the Carrington-like storm in 2003 was reconstructed through the GNSS SDR receiver-post processing of the experimental GPS observations. The raw GPS dual-frequency pseudoranges and navigation messages were collected at the International GNSS Service (IGS) reference station at Ulukhaktok, Victoria Island, Canada. Pseudorange processing and GPS position estimation were performed in three scenarios of pre-mitigation of the ionospheric effects, known as the single major contributor GPS positioning error: (i) no corrections applied, (ii) Klobuchar-based corrected GPS positioning, and (iii) dual-frequency corrected GPS positioning. Resulting GPS positioning error vectors were derived as positioning error residuals from the known reference station position. Statistical properties of the northing, easting, and vertical components of the GPS positioning error vector were analyzed with a software developed in the R environment for statistical computing to select suitable methods for the GPS positioning error prediction model development. The analysis also identified the most suitable theoretical fit for experimental statistical distributions to assist the model development. Finally, two competitive GPS positioning error prediction models were developed, based on the exponential smoothing (reference) and the generalized regression neural networks (GRNN) (alternative) methods. Their properties were assessed to recommend their use as mitigation methods for adverse massive space weather effects in polar regions.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 1; 165-169
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The spoofing detection of local area differential GNSS in the aspect of land transport systems
Wykrycie spoofingu w lokalnych różnicowych GNSS w aspekcie lądowych systemów transportowych
Autorzy:
Dobryakova, L.
Lemieszewski, Ł.
Ochin, E.
Powiązania:
https://bibliotekanauki.pl/articles/311113.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
GNSS
odbiornik satelitarny
spoofing
satellite receiver
Opis:
Differential Global Navigation Satellite System (DGNSS) is an enhancement to GNSS that was developed to correct errors (delays during the signals’ transit to earth) and inaccuracies in the GNSS system, allowing for more accurate positioning of information. In general, access to this correction information makes differential GNSS receivers much more accurate than other receivers; with these errors removed, a GNSS receiver has the potential to achieve accuracies of up to 10 centimeters. The GNSS positioning and navigation is widely used in many industries around the world : aircrafts, ships, missiles, UAVs and vehicles rely on GNSS data. Recent studies have shown that the interference and spoofing of GNSS is a real threat to the reliability and accuracy of the GNSS system and can be used by terrorists. One of the main problems of modern navigation both manned and unmanned transport systems is a problem of transport safety. One of the main problems of modern navigation both manned and unmanned transport systems is a problem of transport safety. To improve the accuracy of transport positioning we use Differential GNSS technology, which is based on setting a fixed referent station with a known geodetic position XYZ. Unfortunately, GNSS is vulnerable to malicious intrusion. GNSS can be spoofed by false signals, but special receivers can provide defenses against such attacks. In this article are considered the principles of architecture LADGNSS – Local Area Differential GNSS.
Różnicowe Globalne Satelitarne Systemy Nawigacyjne (DGNSS) są rozszerzeniem GNSS. Zostały one opracowane w celu skorygowania błędów (opóźnienia sygnałów podczas transmisji do ziemi) i nieścisłości w systemie GNSS, co pozwala na przesłanie bardziej dokładnych informacji pozycjonowania. Dostęp do informacji dotyczących poprawek różnicowych dla odbiorników GNSS pozwala na znacznie bardziej dokładne pozycjonowanie niż w przypadku innych odbiorników. Poprzez usunięcie tych błędów odbiornik GNSS ma potencjał, aby osiągnąć dokładność do 10 centymetrów. Pozycjonowanie GNSS i nawigacja są szeroko stosowane w wielu gałęziach przemysłu na całym świecie: w samolotach, na statkach, w rakietach, bezzałogowych statkach powietrznych(UAV) i pojazdach, opierających swoją pozycję na danych GNSS. Najnowsze badania wykazały, że ingerencja i fałszowanie GNSS jest realnym zagrożeniem dla wiarygodności i dokładności systemu GNSS, podatność ta może być wykorzystana przez terrorystów. Jednym z głównych problemów współczesnych załogowych i bezzałogowych systemów nawigacyjnych jest zagrożenie bezpieczeństwa transportu. Aby zwiększyć dokładność pozycjonowania transportu, wykorzystuje się różne technologie mechanizmu różnicowego GNSS opartego na ustawieniu stacji referencyjnej ze znanym geodezyjnym położeniem w przestrzeni XYZ. Niestety, GNSS jest w dużym stopniu narażone na ataki. Sygnał GNSS może być podrobiony przez nadawanie fałszywych sygnałów, ale specjalne odbiorniki mogą zapewnić przed nimi obronę. W artykule przyjęto zasady architektury LADGNSS – Local Area Differential GNSS.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 147-151, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and analysis of spoofing detection algorithms for GNSS signals
Autorzy:
Dobryakova, L.
Lemieszewski, Ł.
Ochin, E.
Powiązania:
https://bibliotekanauki.pl/articles/359990.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
GNSS
GPS
NAVSTAR
GLONASS
Spoofing
Dual-Receiver
Opis:
Many civil GNSS (Global Navigation Satellite System) applications need secure, assured information for asset tracking, fleet management and the like. But there is also a growing demand for geosecurity locationbased services. Unfortunately, GNSS is vulnerable to malicious intrusion and spoofing. How can users be sure the information they receive is authentic? Spoofing is the transmission of matched-GNSS-signalstructure interference in an attempt to commandeer the tracking loops of a victim receiver and thereby manipulate the receiver’s timing or navigation solution. A spoofer can transmit its counterfeit signals from a stand-off distance of several hundred meters or it can be co-located with its victim. Spoofing attacks can be classified as simple, intermediate, or sophisticated in terms of their effectiveness and subtlety. In an intermediate spoofing attack, a spoofer synchronizes its counterfeit signals with the authentic GNSS signals so they are code-phase-aligned at the target receiver. In this paper we consider the anti-spoofing algorithms based on spoofing detection via Dual-Receiver.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 40 (112); 47-52
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operation and reliability of an onboard GNSS receiver during an in-flight test
Autorzy:
Krasuski, Kamil
Bakuła, Mieczysław
Powiązania:
https://bibliotekanauki.pl/articles/2134863.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
GNSS
satellite receiver
flight test
odbiornik satelitarny
test lotu
Opis:
This article presents and describes the operational capabilities of an onboard GNSS receiver to determine the reliability of the in-flight navigation parameters. An analysis was made of the operation reliability of an autonomous single-frequency Thales Mobile Mapper receiver in air navigation as compared to the technical operation of a dual-frequency Topcon HiperPro receiver. To this end, this work contains a comparison of the aircraft flight navigation parameters based on readings obtained from the Thales Mobile Mapper and Topcon HiperPro receivers. In particular, the comparison concerned the reliability of coordinate determination and flight speed parameters of an aircraft. The research experiment was conducted using a Cessna 172 aircraft, a property of the Military University of Aviation in Dęblin, Poland. Technical operation of the GNSS satellite receivers was tested in the flights of the Cessna 172 aircraft around the EPDE military airport in Dęblin. Based on the results obtained from the tests, it was found that the operational reliability of the Thales Mobile Mapper in the operational phase of the in-flight test ranged from -3.8 to +6.9 m in the XYZ geocentric frame and from -2.2 to +8.1 m in the BLh ellipsoidal frame, respectively. On the other hand, the accuracy of the Cessna 172 aircraft positioning when using the Thales Mobile Mapper receiver was higher than 1.7 m in the XYZ geocentric frame and higher than 2 m in the BLh ellipsoidal frame, respectively. Furthermore, the reliability of the Cessna 172 flight speed determination was from -3.4 to +2.4 m/s.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2021, 111; 75--88
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efekty nieantenowych rekonfiguracji wyposażenia stacji GPS w Borowcu w obserwowanych współrzędnych
Non-antenna effects of equipment reconfiguration at Borowiec GPS station in observed coordinates
Autorzy:
Lehmann, M.
Jaworski, L.
Powiązania:
https://bibliotekanauki.pl/articles/210973.pdf
Data publikacji:
2010
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
wyposażenie stacji permanentnej GNSS (GPS)
szeregi czasowe współrzędnych
GPS receiver replacement
GNSS (GPS) station coordinate
comparison of time series
Opis:
W pracy przedstawiono analizę wpływu zmian poszczególnych elementów wyposażenia stacji permanentnej IGS "BOR1" w Borowcu na wyznaczane współrzędne. Zmiany objęły następujące elementy: odbiornik, komputer oraz taktowanie odbiornika zewnętrznym wzorcem częstotliwości. Do analizy wykorzystano szeregi współrzędnych stacji w Borowcu zarówno z obliczeń sieci globalnych IGS, jak z własnych z rozwiązań wektorów lokalnych do punktów w Poznaniu (POZN) i Warszawie (CBKA).
The article presents the analysis of influence of different elements of the IGS BOR1 station equipment on computed coordinates. Changes concern the receiver, computer and time oscillator. For analysis we used time series of the BOR1 station coordinates, computed by global Analysis Centres and own solutions for local baselines between two receivers in Borowiec and stations POZN and CBKA.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2010, 59, 2; 135-143
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An experimental investigation into the positioning accuracy of low-cost gps receivers in LabVIEW environment
Eksperymentalne badanie dokładności pozycjonowania tanich odbiorników GPS w środowisku LabVIEW
Autorzy:
Pawłowski, E.
Powiązania:
https://bibliotekanauki.pl/articles/266841.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
GNSS
GPS receiver
positioning accuracy
LabVIEW
GPS
WGS-84
odbiornik nawigacji satelitarnej
dokładność pozycjonowania
Opis:
A major problem in the application of satellite navigation systems is the accuracy of position determination. The manufacturers of navigation receivers use a variety of indicators to describe their accuracy of positioning, which causes difficulty in comparing the parameters of different receivers. This study presents a measurement system that allows for experimental determination of satellite navigation systems positioning accuracy. The main element of the implemented system is an application developed in the LabVIEW which receives navigation data from the receiver, collects the appropriate amount of data, and then calculates selected positioning accuracy indicators and presents them in tabular and graphical form. Then relevant calculation formulas and sample measurement results for selected GPS receiver are presented.
Istotnym problemem w stosowaniu systemów nawigacji satelitarnej jest ich dokładność wyznaczania pozycji geograficznej. Niestety producenci odbiorników GPS stosują różne wskaźniki opisujące dokładność pozycjonowania, co powoduje trudności w porównywaniu parametrów odbiorników różnych firm. Problem ten dotyczy zwłaszcza tanich i łatwo dostępnych odbiorników przeznaczonych do innych celów niż profesjonalna nawigacja, geodezja i zastosowania militarne. Dzięki niskiej cenie i coraz lepszym parametrom odbiorniki takie znajdują liczne zastosowania komercyjne w różnych dziedzinach nauki i techniki oraz w wielu wyrobach powszechnego użytku. W pracy przedstawiono system pomiarowy umożliwiający eksperymentalne wyznaczanie dokładności pozycjonowania takich odbiorników. Głównym jego elementem jest aplikacja opracowana w środowisku LabVIEW, która odbiera dane nawigacyjne w standardzie NMEA z badanego odbiornika, gromadzi ich odpowiednią ilość w pamięci komputera, oblicza wybrane wskaźniki dokładności pozycjonowania oraz przedstawia je w postaci tabelarycznej i graficznej. Zaprezentowano odpowiednie wzory obliczeniowe oraz wyniki pomiarów dla przykładowego odbiornika systemu GPS.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2015, 47; 139-142
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Initial analysis of the tracking performance of the GOOSE GNSS Software-Defined Receiver
Autorzy:
Galas, Roman
Kunzi, Florian
Adolfs, Marjolijn
Overbeck, Matthias
Felber, Wolfgang
Powiązania:
https://bibliotekanauki.pl/articles/1819198.pdf
Data publikacji:
2020
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
local ionospheric perturbations
scintillations
single autonomous GNSS monitoring station
continuously monitoring GNSS ground systems
autonomous power management
real-time processing
software-defined receiver
Opis:
The GOOSE (GNSS Receiver with open software interface) Software-Defined Receiver has been developed at the Fraunhofer Institute for Integrated Circuits (IIS) in Nürnberg, Germany. The main motivation for the development of this platform was to control the receiver at all stages, from digital signal processing to the PVT domain, and to enable controlled feedback to the hardware. Besides having access to all raw data including correlation values, the GOOSE receiver also enables for example tight- or ultra-tight integration with an inertial navigation system or other dead reckoning systems, as these kinds of architectures require access to the acquisition and tracking loops. In this paper, the tracking performance of the GOOSE platform was evaluated and compared to a reference receiver (Septentrio PolaRx5S). Several long data sessions were recorded on a “zero baseline” in which both receivers used the same precise geodetic antenna that was also developed at Fraunhofer IIS. The measurements were performed in a harsh environment (obstructions, multipath, possible interferences), as well as on a site with an unobstructed sky view. Quality and performance analyses were performed using raw measurements (in the domain of primary observables) of three civil GPS signals: L1CA, L2CM, and L5. The data were processed using the “zeroEdit” module of the TUB-NavSolutions academic software for education and research. The quality of the raw observables and tracking performance were described by the following parameters: number of cycle slips detected, number of un-correctable cycle slips, number of loss of locks of the signals, number of single epoch data gaps, and the length of carrier phase arcs. The presentation is illustrated with some numerical examples.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2020, 63 (135); 113-120
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
R-Mode receiver development for medium frequency signals
Autorzy:
Grundhöfer, L.
Gewies, S.
Powiązania:
https://bibliotekanauki.pl/articles/134934.pdf
Data publikacji:
2018
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Global Navigation Satellite Systems
GNSS
GPS
R-mode technology
R-mode receiver
LORAN-C
maritime radio beacons
Opis:
Signals from Global Navigation Satellite Systems are the primary source for Position, Navigation and Time (PNT) information onboard any vessel today. As these signals are prone to interference, a maritime backup system is needed to provide reliable PNT data, R(anging)-Mode is such a system. It utilizes existing maritime radio beacons or base stations of the Automatic Identification System (AIS) by adding ranging components to the legacy signals. The first modified radio beacons transmit medium frequency (MF) R-Mode signals in northern Germany. This paper has described the current state of the authors’ research and development activities at the receiver level for MF R-Mode signals. The receiver platform has been introduced, which was based on off-theshelf components and the implemented algorithms for distance estimation have been explained. Furthermore, the results of the first ranging measurements have been presented, which have shown the general suitability of the R-Mode technology as a source for maritime positioning and timing data.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 56 (128); 57-62
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 18

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