Course Details
Space Geodesy 1
Academic Year 2023/24
NEA032 course is part of 1 study plan
NPC-GK Winter Semester 1st year
Dynamics of satellite motion in a gravitational field - a two-body problem.
Disturbed and undisturbed motion of satellites.
Electromagnetic signal propagation in the atmosphere.
Global navigation satellite systems with emphasis on GPS and their applications.
Importance of ground support segment and error modelling for geodetic GNSS measurements.
Course Guarantor
Institute
Objective
Introducing students to space geodesy, especially global navigation satellite systems. Students will learn about the dynamics of the motion of a satellite in orbit around the Earth, the propagation of electromagnetic signals in the atmosphere and their processing for the purpose of determination of the receiver's position on the Earth.
Knowledge
The aim of the course is to deepen students' knowledge in the field of space geodesy, especially in the field of global navigation satellite systems.
The student will:
- understand the dynamics of satellite motion in orbit around the Earth,
- know the principles of different types of satellite measurements,
- have a detailed knowledge of the most important GNSS (GPS, Glonass, Galileo, BeiDou),
- understand the principles of the various GNSS positioning methods
- understand the importance of ground support systems for GNSS,
- understand methods of modelling errors and minimising their impact on results,
- be able to process GNSS measurements for geodetic purposes.
Syllabus
lecture schedule
1. Orthogonal coordinate systems and their mutual transformations, the most important coordinate systems used in space geodesy
2. Chronometry - atomic times, Julian date
3. Two-body problem, unperturbed motion of satellites
4. Disturbed motion of satellites
5. Orbits of satellites, optical and electronic observation methods
6. Propagation of el-mag. signal in the atmosphere, GPS - space segment, navigation signals, navigation message
7. GPS - ground and user segment, receivers, antenna phase centre, breakdown of measurement methods
8. Ephemeris, GPS Time, absolute positioning
9. DGPS, relative methods, creation of differences, linear combination of measurements
10. Resolution of phase measurement ambiguities, relevant measurement methods
11. permanent station networks, GLONASS, Galileo, Beidou
12. GNSS - combination of satellite systems, PPP method
Prerequisites
Kinematics and dynamics of motion, Newton‘s laws of motion, Newton‘s gravitational law, law of refraction and reflection of the light, wave dispersion, methods of modulation of waves, field of dissipative forces, physical conditions in Earth‘s atmosphere.
Language of instruction
Czech
Credits
5 credits
Semester
Forms and criteria of assessment
Specification of controlled instruction, the form of instruction, and the form of compensation of the absences
Lectures are optional, attendance at excercises is compulsory.
Offered to foreign students
Course on BUT site
Lecture
13 weeks, 2 hours/week, elective
Syllabus
lecture schedule
1. Orthogonal coordinate systems and their mutual transformations, the most important coordinate systems used in space geodesy
2. Chronometry - atomic times, Julian date
3. Two-body problem, unperturbed motion of satellites
4. Disturbed motion of satellites
5. Orbits of satellites, optical and electronic observation methods
6. Propagation of el-mag. signal in the atmosphere, GPS - space segment, navigation signals, navigation message
7. GPS - ground and user segment, receivers, antenna phase centre, breakdown of measurement methods
8. Ephemeris, GPS Time, absolute positioning
9. DGPS, relative methods, creation of differences, linear combination of measurements
10. Resolution of phase measurement ambiguities, relevant measurement methods
11. permanent station networks, GLONASS, Galileo, Beidou
12. GNSS - combination of satellite systems, PPP method
Exercise
13 weeks, 2 hours/week, compulsory
Syllabus
Transformation of orthogonal coordinates
Interpolation of satellite ephemerides
GPS satellite position
Preprocessing of GNSS observations
Calculation of position from code measurements
Processing of GNSS network data