Subject description
Introduction in satellite and navigation systems. Development of satellite systems through history. Fundamentals of celestial mechanics, useful satellite orbits and their properties, transport of the satellite into orbit and trajectory adjustments. Space environment, managing the location and temperature of satellite, power sources on board the satellite. Properties of radio links Earth-satellite, satellite-satellite and satellite-Earth, Doppler shift in satellite communications. Design of satellite telecommunications equipment for point-to-point links, broadcasting, mobile telephony, satellite telecommand and telemetry. Development of navigation systems through history. Ground navigation: Maritime (LORAN) Aeronautical (VOR, DME, ILS), positioning systems based on mobile telephony.
Satellite radionavigation: Doppler systems Transit and Cikada, 3-D systems GPS, GLONASS and GALILEO. Primary and secondary radar, pulse and FM radars, Doppler radars. Remote sensing, passive radiometry, active radar with synthetic aperture.
The subject is taught in programs
Objectives and competences
The purpose of this course is to provide principles and techniques of satellite radio links and basic of navigation systems. Understanding the basic laws of space technology, the possibilities and limitations of communication links with the space orbiter. Understanding the basics of ground and satellite radionavigation, radiolocation, and remote sensing.
Teaching and learning methods
Lectures, where students are introduced by the theoretical basics and laboratory courses, where some of the problems are solved practically.
Expected study results
After successful completion of the course, students should be able to:
– describe the basics of space satellite technology with an emphasis on communication and radio-navigation systems,
– predict satellite position in the orbit by real-time satellite tracking and orbit prediction software,
– encyclopedic classification of subsystems for satellite communications and navigation,
– calculate satellite link budgets using transmit power, antenna gain and radio path loss,
– calculate satellite link capacity,
– measure signals and noise in satellite and radio-navigation systems
– determine a position of an object by received radionavigation signals.
Basic sources and literature
- BATAGELJ, Boštjan. Satelitske komunikacije : študijsko gradivo. Ljubljana: Fakulteta za elektrotehniko, Laboratorij za sevanje in optiko, 2013. http://lso.fe.uni-lj.si/studij/skn/gradivo/satelitske_komunikacije%20_Batagelj.pdf.
- BATAGELJ, Boštjan. Zbirka rešenih nalog iz satelitskih komunikacij. Ljubljana: Fakulteta za elektrotehniko, Laboratorij za sevanje in optiko, 201 http://lso.fe.uni-lj.si/studij/skn_vs/gradivo/nalogeSK_1_3.pdf.
- Drago Matko (ur.). Uporaba vesoljskih tehnologij. Radovljica: Didakta, 1996, ISBN 86-7707-091-5.
- Matjaž Vidmar. Radiokomunikacije. 1. izd. Ljubljana: Fakulteta za elektrotehniko, 2005. ISBN 961-243-026-8.
- Matjaž Vidmar. Laboratorijske vaje iz radiokomunikacij. 1. izd. Ljubljana: Fakulteta za elektrotehniko, 2000. ISBN 961-6210-79-3.
- KOSTEVC, Drago. Navigacijske naprave in sistemi. 1. izd. Ljubljana: Založba FE in FRI, 2011. VI, 89 str., ilustr. ISBN 978-961-243-192-1.
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