Wyniki wyszukiwania - Biblioteka Nauki

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The impact of troposphere correction for designation of the ellipsoidal height of aircraft at approach to landing procedure

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Krasuski K. , Savchuk S.

Acta Mechanica et Automatica

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2019

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tom Vol. 13, no. 4

233--237

EN

The paper reports on research into the effect of the troposphere correction on the accuracy of the vertical component determination of an aircraft's flight as it approaches landing at Deblin Airport. The article presents ellipsoidal height value of the aircraft when the troposphere correction is considered in navigational calculations and when it is not taken into account. Accuracy of the aircraft positioning in the vertical plane using the SPP method is determined. The study shows that application of the troposphere correction in navigational calculations increases the accuracy of the vertical component determination by 25%–32%. The article and the study may serve as a valuable source of information for pilots, flight instructors and aircraft crews during training in operation and implementation of GNSS in aviation.

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First results of time series analysis of the permanent GNSS observations at Polish EPN stations using GipsyX software

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Łyszkowicz A. , Pelc-Mieczkowska R. , Bernatowicz A. , Savchuk S.

Artificial Satellites : Journal of Planetary Geodesy

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2021

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tom Vol. 56, No. 3

101--118

EN

The aim of this work is to explore, for the first time in Poland, the possibility of determining Earth’s crust movements from permanent observations at selected permanent stations using the GipsyX software for a period of 8 years (2011-2018) in the ITRF2014 reference frame. The data used in this work are from 15 Aktywna Sieć Geodezyjna (ASG)-EUPOS stations from 2011 to 2018, which are also European Permanent Network (EPN) stations. The stations Borowa Góra, Borowiec, Józefosław, Lamkówko, and Wroclaw are also International Global Navigation Satellite Systems (GNSS) Service (IGS) stations. Daily data, rinex files, for these stations have been made available for this work by the Main Office of Surveying and Cartography. The calculations were made using the GipsyX software in the ITRF14 reference frame. The tests performed have shown that daily solutions from 8-yearlong time series give secular trends with an accuracy of 0.01 mm/yr. Our results suggest that there are small differences in horizontal and vertical velocities and in the accuracy estimated between our and EPN solutions. At some stations, for example, Łódź, the differences are much larger. The impact of additional GNSS observations on the accuracy of determination of horizontal and vertical movements of the Earth's crust shows a submillimeter accuracy in computed coordinates of stations even at a relatively small time interval. It means that multiGNSS Precise Point Positioning (PPP) processing can be used in the future for the estimation of geodynamic processes.

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Reliability of unmanned aerial vehicles: winglets’ issue

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Michalska A. , Michalski D. , Savchuk S.

Aviation and Security Issues

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2023

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tom No. 1

353--367

EN

The reliability of the military equipment determines the possibility of the success of the mission. This paper focuses on identifying damage to Unmanned Aerial Vehicles during their operation. The research problem was expressed by the question: which UAV elements are most often damaged, and what causes it? The research is based on the analysis of technical documents, an electronic damage archiving system, and manufacturer documentation. These studies were complemented by empirical research conducted at the 12th Unmanned Aerial Vehicles Base in Mirosławiec, Poland. The initial phase involved identifying damages affecting the operation of Unmanned Aerial Vehicles. Subsequently, the reliability measure was determined for the repairable two-state object, excluding repair time.

PL

Niezawodność sprzętu wojskowego decyduje o możliwości powodzenia misji. W artykule skupiono się na identyfikacji uszkodzeń bezzałogowych statków powietrznych podczas ich eksploatacji. Problem badawczy wyrażał się w pytaniu: które z elementów UAV ulegają najczęściej uszkodzeniom i co jest tego przyczyną? Badania opierają się na analizie dokumentacji technicznej elektronicznego systemu archiwizacji uszkodzeń oraz dokumentacji producenta. Uzupełnieniem tych badań były badania empiryczne prowadzone w 12. Bazie Bezzałogowych Statków Powietrznych w Mirosławcu. W początkowej fazie zidentyfikowano uszkodzenia mające wpływ na działanie bezzałogowych statków powietrznych. Następnie wyznaczono miarę niezawodności naprawialnego obiektu dwustanowego, z wyłączeniem czasu naprawy.