Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: SPP code method

Sortuj według:

Ogranicz wyniki do:

Improving positioning accuracy of aircraft using SPP method in GLONASS system

Krasuski Kamil, Ciećko Adam, Grunwald Grzegorz, Kirschenstein Małgorzata

Archives of Transport

2024

Vol. 69, iss. 1

21--37

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.

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

Krasuski Kamil, Goś Artur, Ciećko Adam

Journal of KONBiN

2020

Vol. 50, iss. 2

231--241

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.

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.