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| GEOG0037-1 | GNSS : Theory and applications
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| Duration : | 35h Th, 15h Pr |
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| Number of credits : |
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| Lecturer : | René Warnant |
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Language(s) of instruction :
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| French language |
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Organisation and examination :
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| Teaching in the second semester |
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Course contents :
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| The course analyses in details the different concepts on which Global Navigation Satellite Systems are based.
Chapter 1 describes the 3 GNSS segments (space segment, ground segment, user segment); it outlines the basic principle of satellite positioning. It analyses GNSS signal structure and the different GNSS observables (phase and code measurements).
In Chapter 2, GNSS observation equations are derived ( i. e. the link between GNSS observables and the unknown tridimensional user position is established).
Chapter 3 reviews the different error sources which affect GNSS measurements and analyses their modelling; the course focuses on atmospheric effects (neutral and ionized atmosphere).
Chapter 4 reviews the different positioning modes: absolute, relative or differential positioning, real-time or post-processing, use of code and/or phase measurements. Then, the main modern positioning techniques are reviewed; high accuracy positioning techniques (centimetre or sub-centimetre) are analysed in more details. Finally, Chapter 4 discusses the phase ambiguity resolution; it analyses the influence of unmodelled error sources (mainly, atmospheric influences) on the ambiguity resolution process and on the accuracy of relative positioning. This discussion is illustrated with practical cases based on real data. |
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Learning outcomes of the course :
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| The main objective of the course is to give students the necessary material in order to be able to use GNSS mainly in the frame of high accuracy applications (centimetre and sub-centimetre) in Geodesy, Geophysics and in topography. Students will be able to analyse the reliablility of positions measured by GNSS and to identify the origin of possible problems with the measurements. |
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Prerequisites and co-requisites/ Recommended optional programme components :
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| Basic lecture in general Physics (mainly wave physics). |
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Planned learning activities and teaching methods :
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Mode of delivery (face-to-face ; distance-learning) :
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| Face-to-face learning |
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Recommended or required readings :
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| Lecture notes are available (pdf file). |
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Assessment methods and criteria :
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| The evaluation consists in an oral exam (with written preparation) on the material seen during theorical lectures. |
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Work placement(s) :
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Organizational remarks :
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| The course is orgnanised in 3 hour lectures given during the second semester. |
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Contacts :
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| René Warnant (Professor)
Tel : 04/366 90 16
E-mail: Rene.Warnant@ulg.ac.be |
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