The topic of the activity covered by this project is related to the EXPLOITATION OF SENTINEL-1 INTERFEROMETRIC COHERENCE FOR LAND COVER AND VEGETATION MAPPING. This topic addresses the SEOM line of action detailed in the Scope of Work of the Invitation To Tender ESA/AO/1-8306/15/I-NB – ‘SEOM – S14SCI Land’.
This section presents the main technical ideas which lead the development of the project.
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The complex correlation coefficient between two complex SAR images S1 and S2 represents the normalized correlation between these two SAR images [+]
In case of SAR interferometry, the complex correlation coefficient is determined by different physical phenomena in such a way that its final value may be decomposed as a set of multiplicative factors [+]
Given a temporal series of N SAR images S1, S2, …, SN, it is possible to define the Hermitian temporal Covariance matrix of a complete interferometric stack [+]
The covariance matrix needs to be estimated from data, that is, speckle noise must be filtered out. Through the normalization of this matrix we can access to the multi-temporal coherence matrix[+]