Workshops and Short Courses

This workshop aims to explain and debate how new computing techniques can open opportunities to develop innovative radar processing techniques. GPU computing applied to radar signal generation has shown that it is possible to simulate, in quite real time, a dynamic sea with ships in motion. Concerning target simulation, the use of a dynamic sea surface is a way to simulate realistic motions and sea-structure coupling phenomena. The drawbacks of uncertainties associated to real acquisitions can, for a part, be overcome by the perfect knowledge on the “ground truth”. These advanced simulation approaches permit to develop and validate: Processing techniques such as motion compensation or focusing algorithms for moving targets based on ideal situations and then study and improve robustness while adding more and more realistic phenomena encountered in operational conditions. Explore new fields like target classification based on CAD models. Concerning maritime radar clutter, the use of a physical model for the sea is an outstanding disruptive concept, as it permits to overcome some drawbacks of statistical models that cannot handle in a satisfactory way the spatial complexity of real situations. It also closely relates complex EM phenomena, such as breaking wave phenomena and spikes to surface conditions. This workshop aims, considering these examples, to open discussions about state of art in maritime scene simulation and the possible uses by radar experts. Programme 13:50 14:00 Welcome and Introduction of the challenge of new modelling technics for radar studies Christian Cochin, DGA, France  Abstract 14:00 14:20 Radar raw data simulation of a ship with its motions to study robustness of ISAR algorithms simulation Corentin Le Barbu, Alyotech, France ; Marco Martorella, Pisa University, Italy  Abstract 14:20 14:40 Radar raw data of a ship simulation with its motions to study robustness of ISAR algorithms processing Marco Martorella, Pisa University, Italy ; Corentin Le Barbu, Alyotech, France  Abstract 14:40 15:10 Questions and discussions 15:10 15:30 Classification of ships using SAR or ISAR imagery and model based approach and MOCEM simulation Luc Vignaud, ONERA, France; Nina Odegaard, FFI, Norway  Abstract 15:30 16:10 Coffee break 16:10 16:30 Radar raw data generation of sea clutter using PHYSIQ V1 and comparisons to other approaches a nd measurements – simulation Julien Houssay, Nicolas Pinel, Goulven Monnier, Alyotech, France; Keith Ward, Igence UK  Abstract 16:30 16:50 Radar raw data generation of sea clutter using PHYSIQ V1 and comparisons to other approaches a nd measurements comparisons Keith Ward, Igence, UK ; Nicolas Pinel, Julien Houssay, Goulven Monnier, Alyotech, France  Abstract 16:50 17:20 Questions and discussions 17:20 17:50 Use of precomputed and real time computed signals in a disruptive radar performance analysis tools. Nicolas Trouvé, ONERA, France  Abstract WORKSHOPS AND SHORT COURSES 13:50 14:00 Welcome and Introduction of the challenge of new modelling technics for radar studies Christian Cochin, DGA, France Abstract In this talk the organizer(s) will introduce the workshop challenge, illustrating some progress done in modelling and how it can be an opportunity for scientist, for PhD student, labs and industry research departments. The maritime scene simulation will be presented as a recent successful example of application. 14:00 14:20 Radar raw data simulation of a ship with its motions to study robustness of ISAR algorithms simulation Corentin Le Barbu, Alyotech, France ; Marco Martorella, Pisa University, Italy Abstract MOCEM simulation software has been already described in EUSAR and RADAR conferences. It offers to model a target with an innovative method in order to access to a 3D EM model of scatterers. Here, we’d like to focus on a connected tool called MOCVIEW that uses the MOCEM model to generate raw data. In this tool several methods can be offered to compute raw data depending on the component of the scene (ship, sea, and ground) and considering methods adapted to static, URM, complex motion and to different waveforms and technics (time and frequency domain methods). The objective is not to go deeper in each method but to illustrate how the tool can be configured to generate raw data for many kinds of radar and applications, even if the presentation is mainly illustrated with ships. This talk also tells how radar specialists have contributed to the definition of the tool before it has been optimized for GPU computation 14:20 14:40 Radar raw data of a ship simulation with its motions to study robustness of ISAR algorithmsprocessing Marco Martorella, Pisa University, Italy ; Corentin Le Barbu, Alyotech, France Abstract This talk will illustrate how a use of MOCVIEW simulator can be helpful to create step by step realistic raw data to stimulate target motion estimator and drive focusing techniques. 15:10 15:30 Classification of ships using SAR or ISAR imagery and model based approach and MOCEM simulation Luc Vignaud, ONERA, France; Nina Odegaard FFI, Norway Abstract This talk will illustrate the use of open CAD model for a disruptive approach in target classification. The presentation will give the opportunity to present how progress in modelling can open new ways in terms of applications. 16:10 16:30 Radar raw data generation of sea clutter using PHYSIQ V1 and comparisons to other approaches a nd measurements – simulation Julien Houssay, Nicolas Pinel, Goulven Monnier, Alyotech, France; Keith Ward, Igence, UK Abstract Modelling of the animated maritime scene has already been introduced in MOCEM papers. Here, we focus on the PHYS-IQ model, developed by ALYOTECH and funded by DGA, which uses the same kind of dynamic sea surfaces but with a view to computing realistic radar IQ signals of the clutter itself. The model aims to be realistic enough to simulate advanced coherent radar modes in maritime applications. This presentation, which focuses on simulation presentation of the tool, will highlight the ability of PHYS-IQ to fully steer the environment parameters (such as wind speed and direction, fetch length or breaking waves) and to allow a very large range of applications in terms of radar characteristics and acquisition geometry. 16:30 16:50 Radar raw data generation of sea clutter using PHYSIQ V1 and comparisons to other approaches a nd measurements comparisons Keith Ward, Igence, UK; Nicolas Pinel, Julien Houssay, Goulven Monnier, Alyotech, France Abstract This talk will aim to compare real sea clutter data with the type of data generated by PhysIQ, and to highlight the features that need to be reproduced in the simulation in order to replicate real radar performance. It will show the importance of getting the underlying hydrodynamic modelling correct, as is done in PhysIQ, because of the way this feeds though to the temporal and spatial properties of the sea clutter.. 17:20 17:50 Use of precomputed and real time computed signals in a disruptive radar performance analysis tools. Nicolas Trouvé, ONERA, France Abstract This talk will illustrate the use of PHYSIQ models to develop a PPI simulator of a maritime patroller. It presents different balances done between computation time and realism of signals. It will also be illustrated how the same tool can be used for pre-computing of the clutter and how target can be in a second step added in real time on the PPI for detection and tracking studies.