  In this paper, authors propose a new procedure to provide a tool for
monitoring critical infrastructures. Particularly, through the analysis of
COSMO-SkyMed satellite data, a detailed and updated survey is provided, for
monitoring the accelerating destabilization process of the Mosul dam, that
represents the largest hydraulic facility of Iraq and is located on the Tigris
river. The destructive potential of the wave that would be generated, in the
event of the dam destruction, could have serious consequences. If the concern
for human lives comes first, the concern for cultural heritage protection is
not negligible, since several archaeological sites are located around the Mosul
dam. The proposed procedure is an in-depth modal assessment based on the
micro-motion estimation, through a Doppler sub-apertures tracking and a
Multi-Chromatic Analysis (MCA). The method is based initially on the Persistent
Scatterers Interferometry (PSI) that is also discussed for completeness and
validation. The modal analysis has detected the presence of several areas of
resonance that could mean the presence of cracks, and the results have shown
that the dam is still in a strong destabilization. Moreover, the dam appears to
be divided into two parts: the northern part is accelerating rapidly while the
southern part is decelerating and a main crack in this north-south junction is
found. The estimated velocities through the PS-InSAR technique show a good
agreement with the GNSS in-situ measurements, resulting in a very high
correlation coefficient and showing how the proposed procedure works
efficiently.
