Ferretti A., Monti-Guarnieri A., Prati C., Rocca F., Massonnet D. InSAR Principles: Guidelines for SAR Interferometry Processing and Interpretation

Noordwijk: ESA Publications, 2007. — 236 p.This training manual introduces and explains Interferometric Synthetic Aperture Radar (InSAR), including applications for data from the Envisat ASAR sensor and how to combine Envisat and ERS images to produce interferograms and differential interferograms.
Synthetic Aperture Radar (SAR) is a microwave imaging system. It has cloud penetrating capabilities because it uses microwaves; it has day and night operational capabilities because it is an active system; and its ‘interferometric configuration’, Interferometric SAR or InSAR, allows accurate measurements of the radiation travel path because it is coherent. Measurements of travel path variations as a function of the satellite position and time of acquisition allow generation of digital elevation models and measurement of centimetric surface deformations of the terrain.