Results of a research predicting the position of an aircraft during approach and landing using the Bessel function

The article presents theoretical foundations of the position prediction functionality of a GPS receiver to be used by a pilot in the event of an instantaneous lack of position data occurring due to various reasons

Navigation an Aircraft by means of a Position potential in three dimensional space

The main thesis: We assume that the unavailability of GPS information in certain time intervals will be compensated by the implementation of the mathematical model, which will process the aircraft co-ordinates on the basis of the last received position. The study has been divided into four chapters aiming at and presenting the solutions of the above mentioned research problems: Chapter 1 - "Review of the Literature". The analysis also concerned mathematical models designed to supplement GPS satellite navigation system. Chapter 2, "En-route Flights - Aircraft Position Accuracy Assessment", comprises the analysis of author's flight experiments, carried out between 1999 and 2003. Chapter 3, "Approach and Landing Phase - Aircraft Position Accuracy Assessment", tackles the problem of aircraft landing accuracy in flight experiments, which compared the accuracy of landings using the Air Traffic Control Radar Landing System (RALS) with GPS-assisted landings. Chapter 4, "Navigating By Means of a Navigation Potential In Space", proposes a new solution being a development of Vanicek's theory [Benlin Xu, Vanicek P. 2000] by expanding it into the third dimension. The presented mathematical model fills the gap in determining aircraft position in the instance of the lack of navigation information. Knowing the position is of vital importance on the glide path, when the accident risk is very high in adverse weather conditions

A Look Inside the Artificial Immune Algorithm Inspired by Clonal Selection Principle

Artificial Immune Systems inspired by clonal selection principle (called clonal selection algorithms) have already been successfully applied to pattern recognition tasks. In this paper we present our implementation of one of them, called CLONCLAS, and discuss its behavior in application to recognition of a set of binary patterns. The algorithm performs process of learning based on a set of training data including patterns which belong to ten previously unknown classes and finally generates a group of classifiers which are able to assign the testing input patterns to appropriate classes. Our experiments were performed for a set of commonly known similarity measures of binary strings to select the most efficient of them. We also observed a phenomenon of transformation of memory contents in subsequent phases of iterated process of the system learning

The GNSS system application in the LPV-200 landing approach procedure. Part I: Approach to practical verification

Current RNAV GNSS approach procedures are widely used in Europe and worldwide. The development of the GNSS systems as well as the study and control of satellite signals result in the increasing number of approach types with increasingly higher demands and lower operating minimums. LPV-200 is the precision approach with the most strin-gent requirements, and operational minimums of up to 200ft. For the purposes of Part I of this paper static measurements were performed in order to compare the signal characteristics with ICAO requirements. On the basis of the measurements' results, it can be assumed that, within the analyzed period of time, the GNSS signal at the airport in Dęblin only partially met the requirements set for LPV-200 approaches. The data collected were processed and analyzed using Matlab environment.Obecne procedury podejść do lądowania RNAV GNSS znajdują szerokie zastosowanie w Europie i na świecie. Dzięki rozwojowi systemów GNSS, a także analizie i kontroli sygnałów satelitarnych liczba podejść GNSS stale rośnie. Możliwe staje się projektowanie podejść do lądowania z coraz większymi wymogami co do parametrów sygnału z jednocześnie niższymi minimami. LPV-200 jest skrótem oznaczającym precyzyjne podejście do lądowania o najwyższych wymogach i minimum operacyjnym do 200 ft. Na potrzeby pierwszej części artykułu zostały przeprowadzone pomiary statyczne sygnału GNSS w celu porównania ich z wymaganiami stawianymi przez ICAO. Zasadniczo na podstawie przeprowadzonych pomiarów można stwierdzić, że w analizowanym okresie sygnał GNSS spełniał jedynie częściowo wymogi stawione podejściom LPV-200. Zgromadzone dane zostały przetworzone i przeanalizowane w środowisku Matlab

The Use of Magnetic Field and Magnetometers in Supporting the Air Navigation

At present, the Earth’s magnetic field (geomagnetic field) undergoes considerable variations. The use of towers measuring areal variations in magnetic intensity may provide additional support for aircraft navigation. This paper presents the idea of using magnetometers for supporting GNSS as well as for creating a landing system based on magnetic field variations.Pole magnetyczne Ziemi (pole geomagnetyczne) podlega znacznym fluktuacjom. Autorzy założyli, że użycie wież mierzących powierzchniowe zmiany intensywności pola magnetycznego w pobliżu lotniska może dostarczyć dodatkowego wsparcia w nawigacji lotniczej. W artykule przedstawiono nowatorski pomysł zastosowania magnetometrów dla wspierania pomiarów GNSS, jak również dla stworzenia systemu wspomagającego lądowanie opartego na sensorach zmian parametrów pola magnetycznego