In SAR CCD techniques, the phases of two SAR images of the same scene are interfered. Since the launch of the first two European remote sensing (ERS) radar satellites in 19, the value of interfermetric synthetic aperture radar (InSAR) coherence images computed from the processing of two SAR scenes, have been recognized as a useful information source for environmental studies. Preliminary researches and results: setting up of a relationship between suspected hazardous areas boundaries and interferometric coherence The technique based on radar coherence images is known as coherent change detection (CCD).ġ.2. The working hypothesis/approach is based on the fact that in particular circumstances, and for a specific timespan, all the anthropogenic modifications of a given landscape can be accurately mapped from space-borne radar single look complex (SLC) images owing to the exploitation of the coherence information (e.g., and references therein). Our research is dedicated to find out a way to use the surviving “experiments” for both humans and animals with radar remote sensing techniques. Nowadays, social media can improve the collection of pertinent information but only where the Internet is accessible. Mental SHA maps are only partially exploited by the National Mines Action Centers in charge of the surveys because of the great difficulty to collect all the data. But the intersection of all inhabitants’ mental SHA maps should provide another valuable independent source of information to highlight no man’s lands that could be minefields. When correctly located, the inventory of accidents and detonations are primary sources of information to delineate SHA. In regions affected by mines during a long period of time, inhabitants have progressively developed mental SHA maps based on their habituation of the danger. When activities take place in former battle zones, the daily works that shape the landscape such as plowing fields, pruning trees, grazing activities, and roads maintenance, etc., are becoming surviving “experiments” for both humans and animals. Our results shed light on the importance of long-range coherence and possibly long-lived phase excitations for the relaxation of nonequilibrium quantum many-body systems.How to refine the delineation of SHA and thus reduce significantly the cost of clearing operations? When conflicts end, the economic activities restart for the benefit of the society but landmines and UXO disrupt this process. We compare our results with numerical simulations of the Gross-Pitaevskii equation on large three-dimensional grids, finding an overall good agreement. After removing it, the system needs two orders of magnitude longer times to reestablish quantum coherence, compared to the density response. We find that, as the disorder is switched on, long-range phase coherence breaks down one order of magnitude faster than the density of the quantum gas responds. Here, we unravel how the density and phase coherence of a Bose-Einstein condensate of $^6$Li$_2$ molecules respond upon quenching on or off an optical speckle potential. However the fate of long-range phase coherence for hydrodynamic motion of disordered quantum systems is less explored, especially in three dimension. Experimentally, nonequilibrium states of quantum fluids are usually created using moving objects or laser potentials, directly perturbing and detecting the system's density. In contrast to classical systems, the underlying quantum dynamics results not only from atomic interactions but also from the long-range coherence of the many-body wave function. Download a PDF of the paper titled Observing the loss and revival of long-range phase coherence through disorder quenches, by Benjamin Nagler and 4 other authors Download PDF Abstract:Relaxation of quantum systems is a central problem in nonequilibrium physics.

Loss of phase coherence