On the Relationship Between C-Band Decorrelation Phase and the Vegetation Water Content Temporal Change

This paper aims to contribute to clarifying the relationship between phase decorrelation and water content in vegetation and to study the impact of the temporal variability of vegetation water content on InSAR estimates of terrain deformation. We combine three interferograms obtained from three SAR images, of the same area acquired at different times, to derive maps of decorrelation phases. It was found that the magnitude and temporal variability of the decorrelation phase is low in bare soil and high in agricultural and forest areas. Furthermore, it was found that the temporal variation of vegetation water content is related to the phase bias of the cumulative displacement computed with short-interval interferograms.