GI3032 Geodetic Interferometry Syllabus:

GI3032 Geodetic Interferometry Syllabus – Anna University Regulation 2021

COURSE OBJECTIVES:

 To understand the concepts of geodetic interferometry techniques, measurements and very long baseline interferometry

UNIT I INTRODUCTION

History- overview – basics of interferometry – interferometric base line – differential interferometry – phase unwrapping – correlation.

UNIT II GEODETIC INTERFEROMETRY TECHNIQUES

ScanSAR interferometry – solutions for baseline and source position vectors – Phase Referencing – position – frequency – Precession and Nutation – Measurement of Polar Motion and UTI

UNIT III GEODETIC MEASUREMENTS

Geodetic Measurements- Proper Motion and Parallax Measurements- Solar Gravitational Deflection Imaging Astronomical Masers- Least-Mean-Squares Analysis- Second-order effects in phase
referencing

UNIT IV VLBI IN GEODETIC INTERFEROMETRY

Introduction- VLBI elements- techniques-space segment- propagation media- ground segmentinterferometer and interferometric principle- carrier of interferometer baseline- determination of
observables- precision and analysis of group delays

UNIT V DATA ANALYSIS

Automated geodetic VLBI- antenna and receiving systems- data acquisition systems- monitoring and control systems- observations- data reduction and analysis

TOTAL:45 PERIODS
COURSE OUTCOMES:

On completion of the course, the student is expected to
CO1 Apprehend the fundamentals of interferometry
CO2 Identify various interferometric techniques
CO3 Understand different geodetic measurements for Geodetic observations
CO4 Comprehend the components and working principle of VLBI
CO5 Summarize the methods for VLBI data analysis and reduction.

REFERENCES

1. Alef, W., Introduction to Phase-Reference Mapping, in Very Long Baseline Interferometry: Techniques and Applications, Felli, M., and Spencer, R.E., Eds., Kluwer, Dordrecht (1989), pp. 261–274
2. Backer, D.C., and Sramek, R.A., Proper Motion of the Compact, Nonthermal Radio Source in the Galactic Center, Sagittarius A*, Astrophys. J., 524, 805–815 (1999)
3. Bailer-Jones, C.A.L., Estimating Distances from Parallaxes, Publ. Astron. Soc. Pacific, 127, 994– 1009 (2015)
4. Bartel, N., Bietenholz, M.F., Lebach, D.E., Ransom, R.R., Ratner, M.I., and Shapiro, I.I., VLBI for Gravity Probe B: The Guide Star, IM Pegasi, Class. Quantum Grav., 32, 224021 (21pp) (2015)
5. Bartel, N., Ratner, M.I., Shapiro, I.I., Cappallo, R.J., Rogers, A.E.E., and Whitney, A.R., Pulsar Astrometry via VLBI, Astron. J., 90, 318–325 (1985)