GNSS : μελέτη του διαστημικού τμήματος
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Keywords
GNSS ; GPS ; GLONASS ; GALILEO ; BEIDOU ; Παγκόσμια συστήματα δορυφορικής πλοήγησης ; Global navigation satellite systems ; Space segment ; Διαστημικό τμήμα ; Δορυφόροι ; Δορυφορική πλοήγηση ; Satellite navigationAbstract
Global Navigation Satellite Systems (GNSS) are autonomous geo-location systems with global coverage. GNSS use satellites in orbit around Earth and transmit radio signals in various frequencies with time and location data. When a receiver has an unobstructed line of sight to at least four satellites it can determine its geolocation with an accuracy ranging from a few dozen meters down to a centimeter. There are four GNSS in operation, namely GPS, GLONASS, Galileo and BeiDou that are being developed and monitored by the USA, Russia, European Union, and People's Republic of China (PRC) respectively. Satellites in orbit are combined to create the satellite constellation of each system and they are usually in Middle Earth Orbits (MEO), except for BeiDou that uses hybrid orbits. Specifically, it combines satellites in MEO and Geostationary Orbits. All satellite constellations besides the GPS, are divided in three orbital planes. The GPS constellation on the other hand uses six orbital planes. The future challenges for the GNSS include the integration of signals from multiple systems to achieve better accuracy even in harsh environments that impede the propagation of electromagnetic waves.
Postgraduate Studies Programme
ΔΠΜΣ στη Διοίκηση στη Ναυτική Επιστήμη και ΤεχνολογίαDepartment
Σχολή Ναυτιλίας και Βιομηχανίας. Τμήμα Ναυτιλιακών ΣπουδώνCorporate Department
Σχολή Ναυτικών ΔοκίμωνNumber of pages
33Language
GreekCollections
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Αναφορά Δημιουργού - Παρόμοια Διανομή 3.0 Ελλάδα
Αναφορά Δημιουργού - Παρόμοια Διανομή 3.0 Ελλάδα