CU9253 GLOBAL POSITIONING SYSTEMS
UNIT I
History of GPS – BC-4 System – HIRAN – NNSS – NAVSTAR GLONASS and GNSS
Systems – GPS Constellation – Space Segment – Control Segment – User Segment –
Single and Dual Frequency – Point – Relative – Differential GPS – Static and Kinematic
Positioning – 2D and 3D – reporting Anti Spoofing (AS); Selective Availability (SA) –
DOP Factors.
UNIT II
Coordinate Systems – Geo Centric Coordinate System – Conventional Terrestrial
Reference System – Orbit Description – Keplerian Orbit – Kepler Elements – Satellite
Visibility – Topocentric Motion – Disturbed Satellite Motion – Perturbed Motion –
Disturbing Accelerations - Perturbed Orbit – Time Systems – Astronomical Time System
– Atomic Time – GPS Time – Need for Coordination – Link to Earth Rotation – Time and
Earth Motion Services.
UNIT III
C/A code; P-code; Y-code; L1, L2 Carrier frequencies – Code Pseudo Ranges – Carries
Phases – Pseudo Ranges – Satellite Signal Signature – Navigation Messages and
Formats – Undifferenced and Differenced Range Models – Delta Ranges – Signal
Processing and Processing Techniques – Tracking Networks – Ephemerides – Data
Combination: Narrow Lane; Wide Lane – OTF Ambiguity.
UNIT IV
Propagation Media – Multipath – Antenna Phase Centre – Atmosphere in brief –
Elements of Wave Propagation – Ionospheric Effects on GPS Observations – Code
Delay – Phase Advances – Integer Bias – Clock Error – Cycle Slip – Noise-Bias –
Blunders – Tropospheric Effects on GPS Oberservables – Multipath Effect – Antenna
Phase Centre Problems and Correction.
UNIT V
Inter Disciplinary Applications – Crystal Dynamics – Gravity Field Mapping –
Atmospheric Occulation – Surveying – Geophysics – Air borne GPS – Ground
Transportation – Space borne GPS – Metrological and Climate Research using GPS.
REFERENCES:
1. B.Hoffman - Wellenhof, H.Lichtenegger and J.Collins, "GPS: Theory and Practice",
4th revised edition, Springer, Wein, New york,1997
2. A.Leick, "GPS Satellites Surveying", 2nd edition, John Wiley & Sons,NewYork,1995
3. B.Parkinson, J.Spilker, Jr.(Eds), "GPS: Theory and Applications", Vol.I & Vol.II, AIAA,
370 L'Enfant Promenade SW, Washington, DC 20024, 1996
4. A.Kleusberg and P.Teunisen(Eds), “GPS for Geodesy”, Springer-Verlag, Berlin,1996
5. L.Adams, "The GPS - A Shared National Asset”, Chair, National Academy Press,
Washington, DC, 1995
Websites:
6. http://www.auslig.gov.au
7. http://igscb.jpl.nasa.gov
8. http://gibs.leipzig.ifag.de
9. http://www.navcen.uscg.mil
UNIT I
History of GPS – BC-4 System – HIRAN – NNSS – NAVSTAR GLONASS and GNSS
Systems – GPS Constellation – Space Segment – Control Segment – User Segment –
Single and Dual Frequency – Point – Relative – Differential GPS – Static and Kinematic
Positioning – 2D and 3D – reporting Anti Spoofing (AS); Selective Availability (SA) –
DOP Factors.
UNIT II
Coordinate Systems – Geo Centric Coordinate System – Conventional Terrestrial
Reference System – Orbit Description – Keplerian Orbit – Kepler Elements – Satellite
Visibility – Topocentric Motion – Disturbed Satellite Motion – Perturbed Motion –
Disturbing Accelerations - Perturbed Orbit – Time Systems – Astronomical Time System
– Atomic Time – GPS Time – Need for Coordination – Link to Earth Rotation – Time and
Earth Motion Services.
UNIT III
C/A code; P-code; Y-code; L1, L2 Carrier frequencies – Code Pseudo Ranges – Carries
Phases – Pseudo Ranges – Satellite Signal Signature – Navigation Messages and
Formats – Undifferenced and Differenced Range Models – Delta Ranges – Signal
Processing and Processing Techniques – Tracking Networks – Ephemerides – Data
Combination: Narrow Lane; Wide Lane – OTF Ambiguity.
UNIT IV
Propagation Media – Multipath – Antenna Phase Centre – Atmosphere in brief –
Elements of Wave Propagation – Ionospheric Effects on GPS Observations – Code
Delay – Phase Advances – Integer Bias – Clock Error – Cycle Slip – Noise-Bias –
Blunders – Tropospheric Effects on GPS Oberservables – Multipath Effect – Antenna
Phase Centre Problems and Correction.
UNIT V
Inter Disciplinary Applications – Crystal Dynamics – Gravity Field Mapping –
Atmospheric Occulation – Surveying – Geophysics – Air borne GPS – Ground
Transportation – Space borne GPS – Metrological and Climate Research using GPS.
REFERENCES:
1. B.Hoffman - Wellenhof, H.Lichtenegger and J.Collins, "GPS: Theory and Practice",
4th revised edition, Springer, Wein, New york,1997
2. A.Leick, "GPS Satellites Surveying", 2nd edition, John Wiley & Sons,NewYork,1995
3. B.Parkinson, J.Spilker, Jr.(Eds), "GPS: Theory and Applications", Vol.I & Vol.II, AIAA,
370 L'Enfant Promenade SW, Washington, DC 20024, 1996
4. A.Kleusberg and P.Teunisen(Eds), “GPS for Geodesy”, Springer-Verlag, Berlin,1996
5. L.Adams, "The GPS - A Shared National Asset”, Chair, National Academy Press,
Washington, DC, 1995
Websites:
6. http://www.auslig.gov.au
7. http://igscb.jpl.nasa.gov
8. http://gibs.leipzig.ifag.de
9. http://www.navcen.uscg.mil
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