Wyniki wyszukiwania - Biblioteka Nauki

1

The research into the integrity parameter in air transport using GLONASS data

100%

Krasuski K. , Goś A. , Ciećko A.

Journal of KONBiN

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2020

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tom Vol. 50, iss. 2

231--241

EN

The article presents the results of the integrity parameter of the GLONASS satellite positioning system in civil aviation. As a source material for the research the authors used observation and navigation data of the GLONASS system from the onboard GNSS receiver mounted on the Cessna 172. In the research, the authors used a model to determine the aircraft position based on the single-frequency SPP code method for GLONASS L1-C/A observations. The numerical calculations were conducted in the RTKLIB software, in the RTKPOST library. The obtained results are interesting from the point of using an application of the GLONASS system in aviation and the possible implementation of the single-frequency GLONASS code observations in the SPP model in order to determine the aircraft position. On the basis of the obtained results it was found that the GLONASS integrity performance data can be used in a procedure of non-precision approach to landing NPA GNSS.

PL

W pracy przedstawiono wyniki badań parametru wiarygodności pozycjonowania satelitarnego GLONASS w lotnictwie cywilnym. Jako materiał do badań posłużyły dane obserwacyjne i nawigacyjne GLONASS z pokładowego odbiornika GNSS zamontowanego na samolocie Cessna 172. Wykorzystano model wyznaczenia pozycji SP oparty na jednoczęstotliwościowej metodzie kodowej SPP do obserwacji GLONASS L1-C/A. Obliczenia numeryczne wykonano w oprogramowaniu RTKLIB w bibliotece RTKPOST. Uzyskane wyniki badań są interesujące z punktu zastosowania systemu GLONASS w lotnictwie oraz możliwości implementacji jednoczęstotliwościowych obserwacji kodowych GLONASS w modelu SPP wyznaczenia pozycji statku powietrznego. Na podstawie uzyskanych wyników stwierdzono, że osiągi wiarygodności GLONASS mogą zostać wykorzystane w procedurze nieprecyzyjnego podejścia do lądowania NPA GNSS.

2

Algorithms for improving the position determination of an UAV equipped with a single-frequency GPS receiver for low-altitude photogrammetry

100%

Krasuski K. , Wierzbicki D. , Lalak M. , Ciećko A.

Metrology and Measurement Systems

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2023

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tom Vol. 30, nr 3

441--459

EN

The article presents the results of research on the development of a method for improving the positioning accuracy of an UAV equipped with a single-frequency GPS receiver for determining the linear elements of exterior orientation in aerial photogrammetry. Thus, the paper presents a computational strategy for improving UAV position determination using the SPP code method and the products of the IGS service. The developed algorithms were tested in two independent research experiments performed with the UAV platform on which an AsteRx-m2 UAS single-frequency receiver was installed. As a result of the experiments, it was shown that the use of IGS products in the SPP code method made it possible to improve the accuracy of the linear elements to the level of about ±2.088 m for X coordinate, ±1.547 m for Y coordinate, ±3.712 m for Z coordinate. The paper also shows the trend of changes in the obtained accuracy in determining linear elements of exterior orientation in the form of a linear regression function. Finally, the paper also applies the SBAS corrections model for the improvement of UAV position calculation and determination of linear elements of exterior orientation. In this case, the improvement in the accuracy of determining the linear elements of exterior orientation is about ±1.843 m for X coordinate, ±1.658 m for Y coordinate, ±7.930 m for Z coordinate. As the obtained test results show, the use of IGS products and SBAS corrections in the SPP code method makes it possible to improve the determination of UAV positions for the use in aerial photogrammetry.

3

Accuracy analysis of aircraft positioning using real radar and GPS data

100%

Ciećko A. , Goś A. , Krasuski K. , Krześniak K.

Zeszyty Naukowe. Transport / Politechnika Śląska

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2022

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tom z. 116

71--82

EN

This paper presents an analysis of the accuracy of aircraft positioning using radar and GPS satellite data. In particular, this study shows the results of research on determining the position of an aircraft, as well as the range and azimuth parameters for the GCA-2000 radar to the GPS solution. The research used measurement data from the GCA-2000 radar and the Thales MobileMapper Pro receiver placed onboard a Diamond DA-40NG aircraft. The flight experiment was carried out at the EPDE military airport in Dęblin. It was found that the average error in determining the position of the aircraft for the GCA-2000 radar was 295.57 m. Moreover, the average error in determining the range for the GCA-2000 radar is 138.12 m. Additionally, the average error in determining the azimuth for the GCA-2000 radar is equal to 0.408°.

4

Improving positioning accuracy of aircraft using SPP method in GLONASS system

100%

Krasuski K. , Ciećko A. , Grunwald G. , Kirschenstein M.

Archives of Transport

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2024

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tom Vol. 69, iss. 1

21--37

EN

The paper presents the results of a study showing the accuracy of the determination of aircraft position coordinates based on the SPP (Single Point Positioning) solution in the GLONASS (Globalnaja Navigatsionnaya Sputnikovaya Sistema) system. For this purpose, the paper develops and implements an algorithm for the correction of position errors as parameters describing positioning accuracy. The proposed algorithm uses position error values determined for a single GNSS (Global Navigation Satellite Systems) receiver, which are joined in a linear combination to deter-mine the positioning accuracy of the aircraft. The algorithm uses linear coefficients as an inverse function of the number of GLONASS satellites being tracked by the GNSS receiver. The developed algorithm was tested for GLONASS satellite data recorded by Topcon HiPer Pro and Javad Alpha geodetic receivers, during a flight test carried out with a Cessna 172 aircraft around the military airport in Dęblin. Navigation calculations were carried out using RTKLIB v.2.4.3 and Scilab v.6.0.0 software. On the basis of the tests carried out, it was found that for single Topcon HiPer Pro and Javad Alpha receivers, position errors were up to ±11.4 m. However, by using the position error correction algo-rithm for both receivers, GLONASS positioning accuracy is up to ±3.6 m. The developed algorithm reduces position errors by 60-80% for all BLh (B-Latitude, L-Longitude, h-ellipsoidal height) coordinates. The paper shows the possibility of testing and implementing the proposed mathematical algorithm for the SPP solution in a GPS (GlobalPositioning System) navigation system. In this case the position errors from the GPS SPP solution range from -0.9 m to +0.9 m for all BLh coordinates. The obtained results showed that application the GLONASS and GPS system in air transport is important. The algorithm used in this work can also be applied to other global GNSS navigation systems (e.g. Galileo (European Navigation Satellite system) or BeiDou (Chinese Navigation Satellite System)) in air transport and navigation.

5

Accuracy analysis of aircraft positioning using GPS dual receivers in aerial navigation

100%

Krasuski K. , Ciećko A. , Wierzbicki D.

Zeszyty Naukowe. Transport / Politechnika Śląska

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2022

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tom z. 115

23--34

EN

This study presents a modified algorithm to determine the accuracy of GPS positioning in aerial navigation. To achieve this, a mixed model with measurement weights was used to determine the resultant value of accuracy of aerial vehicle positioning. The measurement weights were calculated as a function of the number of GPS tracking satellites. The calculations were performed on actual GPS measurement data recorded by two onboard GNSS receivers installed onboard a Cessna 172 aircraft. The flight test was conducted around the military airport in Dęblin. The conducted analyses demonstrated that the developed algorithm improved the accuracy of GPS positioning from 62 to 91% for horizontal coordinates and between 16-83% for the vertical component of the aerial vehicle position in the BLh ellipsoidal frame. The obtained test results show that the developed method improves the accuracy of aircraft position and could be applied in aerial navigation.

6

Research into the integrity of Galileo positioning at Dęblin aerodrome

88%

Krasuski K. , Kobiałka E. , Ćwiklak J. , Grzegorzewski M. , Ciećko A.

Journal of KONBiN

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2019

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tom Vol. 49, iss. 4

75--96

EN

The paper presents the results of the integrity of Galileo satellite positioning for the area of the military aerodrome in Dęblin. The integrity parameters of the Galileo satellite positioning have been determined for en-route navigation and the precision approach. To study the integrity parameter, Galileo satellite measurements from the GNSS reference station located in the area of the Aviation Department of the Polish Air Force University, located near EPDE military aerodrome in Dęblin, were used. In particular, in the research, to determine the integrity parameter, the mean errors of the determined coordinates of GNSS reference station in the BLh ellipsoid frame were used. The research test was carried out on 11 January,2019. The authors of the work studied the parameter of the integrity of Galileo positioning used HPL and VPL protection levels.

PL

W pracy przedstawiono rezultaty wiarygodności pozycjonowania satelitarnego Galileo dla terenu lotniska wojskowego w Dęblinie. Parametry wiarygodności pozycjonowania satelitarnego Galileo zostały określone dla nawigacji typu en-route oraz podejścia precyzyjnego PA. Do zbadania parametru wiarygodności wykorzystano pomiary satelitarne Galileo ze stacji referencyjnej GNSS umieszczonej na terenie Wydziału Lotnictwa Lotniczej Akademii Wojskowej, zlokalizowanej w pobliżu lotniska wojskowego EPDE w Dęblinie. W szczególności w badaniach do określenia parametru wiarygodności wykorzystano błędy średnie wyznaczonych współrzędnych stacji referencyjnej GNSS w układzie elipsoidalnym BLh. Test badawczy został przeprowadzony w dniu 11.01.2019 r. Autorzy prac do badania parametru wiarygodności pozycjonowania Galileo wykorzystali poziomy bezpieczeństwa HPL oraz VPL.

7

Analysis of the precision of determination of aircraft coordinates using EGNOS+SDCM solution

75%

Krasuski K. , Lalak M. , Gołda P. , Ciećko A. , Grunwald G. , Mrozik M. , Kozuba J.

Archives of Transport

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2023

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tom Vol. 67, iss. 3

105--117

EN

This paper presents an algorithm for determining the precision parameter for aircraft position coordinates based on a combined GPS/EGNOS and GPS/SDCM solution. The proposed algorithm uses a weighted average model that combines a single GPS/EGNOS and GPS/SDCM position navigation solution to determine the resulting aircraft coordinates. The weighted mean model include the linear coefficients as a function of: the inverse of the number of tracked GPS satellites for which EGNOS and SDCM corrections have been generated, and the inverse of the geometric coefficient of the PDOP (Position Dilution of Precision). The corrections between the single GPS/EGNOS and GPS/SDCM solution to the aircraft's resultant coordinates are then calculated on this basis. Finally, the standard deviation for the aircraft resultant BLh (B-Latitude, L-Longitude, h-ellipsoidal height) coordinates is calculated as a measure of precision. The research experiment used recorded on-board GPS+SBAS data from two GNSS receivers mounted on a Diamond DA 20-C1 aircraft. The test flight was carried out on the Olsztyn-Suwałki-Olsztyn route. The calculations of aircraft position based on GPS/EGNOS and GPS/SDCM solution were performed in the RTKLIB v.2.4.3 program in the RTKPOST module. Next, aircraft resultant coordinates and standard deviations were computed in Scilab v.6.0.0 software package. Based on the tests performed, it was found that for the Trimble Alloy receiver, the standard deviation values for the ellipsoidal coordinates BLh of the aircraft do not exceed 1.77 m. However, for the Septentrio AsterRx2i receiver, the values of standard deviations for the aircraft's ellipsoidal BLh coordinates do not exceed 5.04 m. The use of linear coefficients as the inverse of the number of tracked GPS satellites with SBAS corrections in the GPS/EGNOS+GPS/SDCM positioning model resulted in a reduction in standard deviations of approximately 50-51% relative to the solution with linear coefficients calculated as the inverse of the PDOP parameter. In paper, the standard deviation was also obtained using arithmetic mean model. However the values of standard deviation from weighted mean model are lower than arithmetic mean model.

8

Analysis of the accuracy of EGNOS+SDCM positioning in aerial navigation

63%

Mrozik M. , Kozuba J. , Krasuski K. , Ćwiklak J. , Bakuła M. , Ciećko A. , Grunwald G. , Wierzbicki D.

Archives of Transport

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2022

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tom Vol. 64, iss. 4

135--144

EN

The article presents a modified scheme of determining the accuracy parameter of SBAS (Satellite Based Augmentation System) positioning with use of two supporting systems: EGNOS (European Geostationary Navigation Overlay Service) and SDCM (System of Differential Correction and Monitoring). The proposed scheme is based on the weighted mean model, which combines single solutions of EGNOS and SDCM positions in order to calculate the accuracy of positioning of the aerial vehicle. The applied algorithm has been tested in a flight experiment conducted in 2020 in north-eastern Poland. The phase of approach to landing of a Diamond DA 20-C1 aircraft at the EPOD airport (European Poland Olsztyn Dajtki) was subjected to numerical analysis. The Septentrio AsterRx2i geodesic receiver was installed on board of the aircraft to collect and record GPS (Global Positioning System) observations to calculate the navigation position of the aircraft. In addition, the EGNOS and SDCM corrections in the “*.ems” format were downloaded from the real time server data. The computations were realized in RTKPOST library of the RTKLIB v.2.4.3 software and also in SciLab application. Based on the conducted research, it was found that the accuracy of aircraft positioning from the EGNOS+SDCM solution ranged from -1.63 m to +3.35 m for the ellipsoidal coordinates BLh. Additionally, the accuracy of determination of the ellipsoidal height h was 1÷28% higher in the weighted mean model than in the arithmetic mean model. On the other hand, the accuracy of determination of the ellipsoidal height h was 1÷28% higher in the weighted mean model than for the single EGNOS solution. Additionally, the weighted mean model reduced the resultant error of the position RMS-3D by 1÷13% in comparison to the arithmetic mean model. The mathematical model used in this study proved to be effective in the analysis of the accuracy of SBAS positioning in aerial navigation.