GI3017 Polarimetry and Interferometry Syllabus:

GI3017 Polarimetry and Interferometry Syllabus – Anna University Regulation 2021

COURSE OBJECTIVES:

 To familiarize the students with the concepts of polarimetric and Interferometric observation and its applicability.

UNIT I BASICS OF SAR POLARIMETRY

Electromagnetic Waves – Plane Waves – Coherence – Polarization Ellipse – Polarization types: Circular, Elliptical and Linear Horizontal and Linear vertical polarization – Polarimetric Channels: single, dual ,Alternative (ASAR), polarized waves – quadrature or polarimetric waves – Polarimetric representation :Stokes vector and degree of polarization, Scattering matrix – covariance and coherence matrices, stokes and muller matrics – polarimetry parameters : Total power, co-pol correlation coefficient, co-pol phase difference and coefficient of variation.

UNIT II PROCESSING OF SAR POLARIMETRY DATA

Polarization Signature: single bounce, double bounce,multi-bounce scatterers and Bragg scatterer – Coherent polarimetric decomposition methods: Pauli,Krogager, Cameron decompositions and Touzi criterion – Incoherent polarimetric decomposition methods: Freeman,Huynen-Barnes,Eigen vector-Eigen value decomposition – Polarimetric classifications :Unsupervised H/A/α, Supervised Bayes maximum likelihood classifications-Overview of Data formats and software ( Both free and commercial) availability for SAR and polarimetric- Limitation of polarimetry for practical use and future technological and processing trends.

UNIT III BASICS OF SAR INTERFEROMETRY

Basics principle – Interference pattern : Point source, Constructive and Destructive interference – Interferogram – Interference fringe : intensity and visibility of fringes – localization of fringes – Complex SAR image – Interferometric data structure/Single Look Complex data – Classes of SAR Interferometry- Single Pass/across track, repeat pass/along track and differential SAR Interferometry – INSAR viewing geometry – Sensitivities and errors .

UNIT IV PROCESSING OF SAR DATA FOR INTERFEROMETRY

Terrain altitude measurement using INSAR: Baseline estimation, interferogram generation, Orbital flattening, phase unwrapping: branch cuts, fringe detection and absolute phase determination, phase to height conversion, Geocoding of DEM – Differential INSAR: – Multipass geometry – Multiinterferogram techniques : PSINSAR ,SBAS and SqueeSAR – 2D-displacement estimation – precision assessment and validation: atmospheric contribution, phase noise sources: look angle and temporal decorrelation effect, volume scattering effect. Data availability, software availability, limitations and future trends.

UNIT V MISSIONS AND APPLICATIONS

Missions:TerraSAR X,ERS 1and2,ENVISAT,RADARSAT,ALOS,RISAT,Sentinel 1 and GRACE satellite. Polarimetric Applications : Soil tillage,crop productivity – snow mapping-sea-ice structure and type- forest type mapping – Soil moisture mapping- Flood/Wetland mapping – Marine winds – oil slick detection – ship detection. Interferometric Applications Vegetation height estimation – Tectonic deformations : pre,co-and post-seismic deformations – Ground Subsidence: Oil and Ground water extraction, Mine subsidence – Landslide detection – Reclaimed Land monitoring – Glacier monitoring: regular ice stream movement and tidal flexing of glaciers –volcanic inflation and deflation.

TOTAL: 45 PERIODS
COURSE OUTCOMES:

On completion of the course, the student is expected to
CO1 Understand the basic concepts of Polarimetry and Interferomtery
CO2 Gain knowledge about polarimetric processing concepts
CO3 Acquire the knowledge about the fundamentals of SAR Interferometry
CO4 Learn about the grammetric concepts of Interferometric techniques
CO5 Familiarize about the applicability of SAR Polarimetry and Interferometry

TEXTBOOKS:

1. Jhon R.Schott, Fundamentals of Polarimetric Remote Sensing, SPIE press, 2010.
2. P.Hariharan,”Basics of SAR Interferometry”,Elsevier, 2007.

REFERENCES

1. Alessandro Ferretti,”Satellite InSAR data: Reservoir monitoring from Space”, EAGE Publications, 2014.
2. Alessandro Ferretti, Andrea Monti-Guarnieri,Claudio Prati,Fabio Rocca, “INSAR principles: Guidelines for SAR Interferometry processing and interpretation”,ESA Publicaions,2007.
3. Woodhouse lain. H, “Introduction to Microwave Remote Sensing” Taylor & Francis, 1st edition, 2006.
4. V. B. H. (Gini) Ketelaar,”Satellite Radar Interferometry- Subsidence Monitoring Techniques, Sprringer,2009.
5. Jong-sen Lee,Eric Pottier,” Polarimetric Radar Imaging :From Basics to Applications, Taylor & Francis Inc,2009.
6 Ramon F. Hanssen,”Radar Interferometry: Data Interpretation and Error Analysis: 2 (Remote Sensing and Digital Image Processing), Springer; 2001