Prof. Fabio Rocca
Politecnico di Milano DEIB (Emeritus)
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Academic Career Length
57Years (1970-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 January 2001 in IEEE Transactions on Geoscience and Remote Sensing
Journal Article
Temporal and geometrical decorrelation often prevents SAR interferometry from being an operational tool for surface deformation monitoring and topographic profile reconstruction. Moreover, atmospheric disturbances can strongly compromise the accuracy of the results. The authors present a complete procedure for the identification and exploitation of stable natural reflectors or permanent scatterers (PSs) starting from long temporal series of interferometric SAR images. When, as it often happens, the dimension of the PS is smaller than the resolution cell, the coherence is good even for interferograms with baselines larger than the decorrelation one, and all the available images of the ESA ERS data set can be successfully exploited. On these pixels, submeter DEM accuracy and millimetric terrain motion detection can be achieved, since atmospheric phase screen (APS) contributions can be estimated and removed. Examples are then shown of small motion measurements, DEM refinement, and APS estimation and removal in the case of a sliding area in Ancona, Italy. ERS data have been used.
1 January 2000 in IEEE Transactions on Geoscience and Remote Sensing
Journal Article
12 May 2011 in IEEE Transactions on Geoscience and Remote Sensing
Journal Article
AFAlessandro Ferretti
Alessandro FerrettiAFAlfio Fumagalli
Alfio Fumagalli
FNFabrizio Novali
Fabrizio Novali
CPClaudio Prati
Claudio Prati
Fabio RoccaARAlessio Rucci
Alessio Rucci
Permanent Scatterer SAR Interferometry (PSInSAR) aims to identify coherent radar targets exhibiting high phase stability over the entire observation time period. These targets often correspond to point-wise, man-made objects widely available over a city, but less present in non-urban areas. To overcome the limits of PSInSAR, analysis of interferometric data-stacks should aim at extracting geophysical parameters not only from point-wise deterministic objects (i.e., PS), but also from distributed scatterers (DS). Rather than developing hybrid processing chains where two or more algorithms are applied to the same data-stack, and results are then combined, in this paper we introduce a new approach, SqueeSAR, to jointly process PS and DS, taking into account their different statistical behavior. As it will be shown, PS and DS can be jointly processed without the need for significant changes to the traditional PSInSAR processing chain and without the need to unwrap hundreds of interferograms, provided that the coherence matrix associated with each DS is properly “squeezed” to provide a vector of optimum (wrapped) phase values. Results on real SAR data, acquired over an Alpine area, challenging for any InSAR analysis, confirm the effectiveness of this new approach.
1 November 2011 in Remote Sensing of Environment
Journal Article
TTT. Le Toan
T. Le Toan
SQS. Quegan
S. Quegan
MDM.W.J. Davidson
M.W.J. Davidson
Heiko BalzterPPP. Paillou
P. Paillou
Lars Ulander +5
1 March 1991 in IEEE Transactions on Aerospace and Electronic Systems
Journal Article
The focusing of synthetic-aperture-radar (SAR) data using migration techniques quite similar to those used in geophysics is treated. The algorithm presented works in the ω-kx domain. Because time delays can be easily accommodated with phase shifts that increase linearly with ω, range migration poses no problem. The algorithm is described in plane geometry first, where range migration and phase history can be exactly matched. The effects of the sphericity of the Earth, of the Earth's rotation, and of the satellite trajectory curvature are taken into account, showing that the theoretically achievable spatial resolution is well within the requirements of present day and near future SAR missions. Terrestrial swaths as wide as 100 km can be focused simultaneously with no serious degradation. The algorithm has been tested with synthetic data, with Seasat-A data, and with airplane data (NASA-AIR). The experimental results fully support the theoretical analysis
1 July 1994 in IEEE Transactions on Geoscience and Remote Sensing
Journal Article
FGF. Gatelli
F. Gatelli
Andrea Virgilio Monti GuarnieriFPF. Parizzi
F. Parizzi
PPPaolo Pasquali
Paolo PasqualiCPC. Prati
C. Prati
Fabio RoccaSAR surveys from separate passes show relative shifts of the ground wavenumber spectra that depend on the local slope and the off-nadir angle. The authors discuss the exploitation of this spectral shift for different applications: 1) generation of "low noise" interferograms benefiting phase unwrapping, 2) generation of quick-look interferograms, 3) decorrelation reduction by means of tunable SAR systems (TINSAR), 4) range resolution enhancement, and 5) the combination of SAR data gathered by different platforms (airborne and satellite) for a "long-time coherence" study.<>
About Me
Emeritus Professor of Telecommunications at the Politecnico di Milano. Graduated in 1962, full Professor in 1975. Visiting Professor at the Department of Geophysics of Stanford University (1978 : 1988). Co-founder of two technological spin off companies: TRE, Aresys.
Coordinator of the first EU Programme for Geosciences (1990 – 95). Member of the Scientific Councils of the Institut Français du Pètrole (1989 – 2003), Agenzia Spaziale Italiana (1998 – 2001), OGS (1994 – 2010). For the European Space Agency, in Mission Advisory Groups on SAR (1991 – 2015), Advisory Committee on Earth Observations (2015 – 2019). Associate to ASI (2017 -2023) and in the Dragon program (ESA - NRSCC) from 2004.
Past President (1987) and Honorary Member (1998) of EAGE and Honorary Member of SEG (1989). 1979 Honeywell Award (computer tomography), 1990 EAGE Schlumberger Award (bistatic processing), 1995 Italgas Award (PLL demodulators), 1998 Special Commendation Award of the SEG (first 3D computerized seismic model), 1999 Eduard Rhein Award (motion compensation in video coding). Doctor H. C. in Geophysics by the French Ministère de l’Éducation Nationale and the Institut Polytechnique de Lorraine (2001). EAGE 2009 Erasmus Award; 2012 ENI Award for New Frontiers for Hydrocarbons (long term differential interferometry). Chinese Government International Scientific Technological Cooperation Award for 2014. Commemorative Medal for the 70th Anniversary of the People's Republic of China.