GI3030 Satellite Geodesy Syllabus:

GI3030 Satellite Geodesy Syllabus – Anna University Regulation 2021

COURSE OBJECTIVES:

 This subject deals with satellites in space, which are used for the geodetic applications. Several satellites launched will transmit the carrier signal, by receiving the ground position are determined.

UNIT I INTRODUCTION

Introduction to satellite geodesy- Overview of GNSS: Introduction to GPS- GLONASS- GALILEOBIDOU- IRNSS satellite systems etc. Keplerian laws of satellite motion- geometry of ellipse and Keplerian ellipse in space- transformation of coordinates from Keplerian elements to Earth centered Earth fixed (ECEF) coordinate system- perturbed satellite motion- Lagrangian and Gaussian forms of perturbation equations- gravitational and non-gravitational perturbing forces- geodetic applications of satellite missions.

UNIT II DIFFERENT TECHNIQUES

Observables and Basic Concepts- Determination of Directions- Ranges and Range Differences (Doppler method)- Satellite Altimetry- Determination of Ranges and Range-Rates (Satellite-toSatellite Tracking)- Interferometric Measurements- Satellites Used in Geodesy- Navigation PayloadPRARE- Planned Satellites and Missions- Electronic Ranging SECOR- Electronic observation techniques – Doppler Effect – Positioning concept – Development of TRANSIT satellites.

UNIT III SATELLITE SYSTEM

GPS – Different segments – space- control and user segments – GPS signal structure and code modulation- pseudo range measurements and navigation solution signal structure – Accuracy of navigation position: UERE and DOP. Intentional degradation of GPS signals: Selective availability (SA) and anti-spoofing (AS). GPS receiver’s components. Differential GPS: Space based augmentation systems (e.g.- GAGAN- WAAS- EGNOS) and ground-based augmentation systems (GBAS).

UNIT IV GPS DATA OBSERVATION

GPS observables – code and carrier phase observation. Single differencing- double differencing and triple differencing in GPS measurements. ambiguity resolution- multi path and other observational errors- doppler effect on GPS signals- cycle slip detection. GNSS observation- data downloadingprocessing and discussion of processed data. Relative positioning: Static – Rapid static and pseudo kinematic; kinematic positioning – pure kinematic- semi kinematic and real time kinematic (RTK) methods of observations. Real time network (VRS) services.

UNIT V GPS DATA PROCESSING AND APPLICATIONS OF SATELLITE GEODESY

Networking- data post processing; with commercial software and scientific software. CORS – setting up of regional geodetic networks and development of regional geoid models. Geodetic control surveys- Cadastral surveying- Photogrammetry- Remote Sensing- Engineering and Monitoring GIS – Satellite Laser Ranging and Applications.

TOTAL:45 PERIODS
COURSE OUTCOMES:

On completion of the course, the student is expected to
CO1 Recognize the factors affecting satellite motion and laws governing the motion
CO2 Summarize various techniques available for geodetic measurements from space
CO3 Understand the concepts and components of GNSS
CO4 Choose appropriate methods for GNSS surveying
CO5 Summarize various applications of Satellite Geodesy

TEXTBOOKS:

1. Seeber G, Satellite Geodesy, Walter De Gruyter, Berlin, 2nd edition 2008

REFERENCES

1. Alfred Leick, GPS satellite surveying, John Wiley & Sons Inc., 4th Edition, 2015.
2.Guocheng Xu, GPS Theory, Algorithms and Applications, Springer – Verlag, Berlin, 2004