Part B InSAR processing: a practical approach

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Part B InSAR processing : a practical approach ________________________________________ __________________Selecting ERS images for InSAR processing B-3 1. Selecting ERS images for InSAR processing Introduction Selection of SAR images suitable for interferometry use is the first step to be carried out for any interferometric processing . It is a key step, since the criteria adopted for selection of the images have strong impact on the quality of the final results. These criteria depend upon the specific application for which the SAR interferometric images are required. In this chapter a few selection criteria will be given concerning the two most important InSAR applications: Digital Elevation Model (DEM) generation and Differential Interferometry (DInSAR). In particular, we shall analyse how to select the following parameters in order to get the best results from the SAR interferometric analysis: View angle (ascending and descending passes) Geometrical baseline Temporal baseline Time of the acquisition Coherence Meteorological conditions Before starting the analysis of the selection criteria, it is worthwhile spending a few words on the information available about ERS images.

_____Selecting ERS images for InSAR processing B-5 Figure 1-2: The DESCW query panel. The area of interest can be selected by providing the geographic coordinates and checking the result on the map on the right panel.

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