A radar technique used in geodesy and remote sensing. This geodetic method uses two or more synthetic aperture radar (SAR) images to generate maps of surface deformation or digital elevation, using differences in the phase of the waves returning to the satellite, or aircraft. The technique can potentially measure centimetre-scale changes in deformation over timespans of days to years. It has applications for geophysical monitoring of natural hazards, for example earthquakes, volcanoes and landlsides, and also in structural engineering, in particular monitoring of subsidence and structural stability.
Published in Chapter:
Geometric Quality in Geographic Information IFSAR DEM Control
José Francisco Zelasco (Universidad de Buenos Aires, Argentina), Judith Donayo (Universidad de Buenos Aires, Argentina), Kevin Ennis (Universidad de Buenos Aires, Argentina), and José Luís Fernandez Ausinaga (Universidad de Buenos Aires, Argentina)
Copyright: © 2009
|Pages: 7
DOI: 10.4018/978-1-60566-242-8.ch044
Abstract
Both this, article II and another one, article I, titled “Geometric Quality In Geographic Information” published in this encyclopedia propose the theoretical aspects of the method to evaluate the geometric integrity of Digital Elevation Models obtained by different techniques and therefore, different stochastic hypotheses are considered. In the article I we considerer the classical topographic or aerial photogrammetry stereo images method (included ASTER or SPOT images) and we assume consistent stochastic hypotheses. In this Article II we consider IFSAR techniques and the stochastic hypotheses are specific according to the particular geometry involved in this technique.