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The Identification of Possible Applications of The E-Loran System

Czaplewski K., Weintrit A.

Annual of Navigation

2018

No. 25

165--186

Global Navigation Satellite Systems (GNSS) more and more affect many areas of human activity in the world. Every day human activity around the world depends upon satellite systems for positioning, navigation and timing. As these systems are commonly used further efforts must be made to make GNSS more immune to on occurring more and more frequently incidents of jamming and spoofing. It seems that eLoran system is currently the best the technical and scientific solution to allowing for effective protection of the Global Navigation Satellite Systems. Last year the authors presented eLoran system as a potential tool for transmission of the national time signal [Curry et al., 2017]. This time the authors present abilities of additional use of the eLoran as a back-up system for GNSS.

Globalne systemy nawigacji satelitarnej (GNSS) coraz bardziej wpływają na wiele obszarów ludzkiej działalności na świecie. Każdego dnia działalność człowieka na całym świecie zależy od satelitarnych systemów pozycyjnych. Ponieważ systemy te są powszechnie używane, należy podjąć dalsze wysiłki, aby uczynić GNSS bardziej odpornym na coraz częstsze przypadki zagłuszania i podszywania się. Wydaje się, że system eLoran jest obecnie najlepszym technicznym i naukowym rozwiązaniem umożliwiającym skuteczną ochronę globalnych systemów nawigacji satelitarnej. W ubiegłym roku autorzy przedstawili system eLoran jako potencjalne narzędzie do transmisji krajowego sygnału czasu [Curry i in., 2017]. Tym razem autorzy prezentują możliwości dodatkowego wykorzystania systemu eLoran jako systemu rezerwowego dla GNSS.

Global Positioning System: Political Support, Directions of Development, and Expectations

Czaplewski K.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2015

Vol. 9, no. 2

229--232

Over the last decade the Global Positioning System has become a global, multifunctional tool which provides services that are an integral part of U.S. national security as well as the security of other highly developed countries. Economic development, transport security as well as homeland security are important elements of the global economic infrastructure. In 2000 the United States acknowledged the growing significance of GPS for civilian users and stopped intentionally degrading accuracy for non-military signals that are known as “Selective Availability”. Since then, commercial applications of satellite systems have been proliferating even more rapidly, and therefore, their importance in everyday life has greatly increased. Currently, services that depend on information obtained from the Global Positioning System are the driving force behind economic growth, economic development and the improvement in life safety. This economic development would not be possible without the financial and political support of the US government to maintain the operation of the GPS system. Therefore it is important to have knowledge about the intentions of the US government how system GPS will be developed in the future. Decisions taken in the last 3 months are the subject of this article.