Chapman S.,Selex ES
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014
This paper discusses the advanced and novel technologies and underlying systems capabilities that Selex ES has applied during the development, test and evaluation of the twin head Miysis DIRCM System in order to ensure that it provides the requisite levels of protection against the latest, sophisticated all-aspect IR MANPADS. The importance of key performance parameters, including the fundamental need for "spherical" coverage, rapid time to energy-on-target, laser tracking performance and radiant intensity on seeker dome is covered. It also addresses the approach necessary to ensure that the equipment is suited to all air platforms from the smallest helicopters to large transports, while also ensuring that it achieves an inherent high reliability and an ease of manufacture and repair such that a step change in through-life cost in comparison to previous generation systems can be achieved. The benefits and issues associated with open architecture design are also considered. Finally, the need for extensive test and evaluation at every stage, including simulation, laboratory testing, platform and target dynamic testing in a System Integration Laboratory (SIL), flight trial, missile live-fire, environmental testing and reliability testing is also described. © 2014 SPIE.
Capper P.,Selex ES
Journal of Materials Science: Materials in Electronics | Year: 2015
It is ~50 years now since the first development of the ternary compound cadmium mercury telluride (MCT) in bulk crystal form for infrared (IR) applications. MCT (CdxHg1–xTe) is still the pre-eminent infrared material, and by varying the x value the material can be made to cover all the important IR ranges of interest (i.e. 1–3, 3–5 and 8–14 μm). The first half of its history really concerned the use of bulk-grown slices to produce a wide range of photoconductive (PC) IR detectors for various applications in the longwave (8–12 μm), midwave (3–5 μm) and shortwave (1–3 μm) regions. The second half of its history has seen its main function supplanted by various forms of epitaxial growth, particularly liquid phase epitaxy, metal-organic vapor phase epitaxy and molecular beam epitaxy, to produce the more versatile photovoltaic focal plane arrays (FPA) currently being manufactured. However, there have been small pockets of activity across the world during the last 25 years studying defects, growth issues, some residual PC detector work and lately its use in large-area optical components that give protection to MCT FPAs in niche applications. It is this later period that forms the focus of this paper. © 2015, Springer Science+Business Media New York.
Serafino G.,Selex ES
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2015
In this paper are reported Selex results of the tests, performed in a simulation environment, of multi-object trajectory optimization algorithms, for weather avoidance and emissions reduction. These optimization algorithms, developed under European Clean Sky project, are based on operational research concepts, and they are aimed to calculate optimized trajectory in terms of several emission reduction. The emissions to be simultaneously reduced are CO2, proportional to fuel consumption, NOx and noise. The simultaneous reduction of all these three pollutants is nontrivial as reducing one pollutant can lead to an increase in the others. The chosen approach, to reduce simultaneously the different emissions, is to combine the different pollutant using a linear combination of the weighted emissions. The automatic generation of the optimized trajectories is later validated in realistic flight simulator to verify the results with an easy, safe and economic way. © Springer International Publishing Switzerland 2015
Ristic B.,Defence Science and Technology Organisation, Australia |
Farina A.,Selex ES
IET Radar, Sonar and Navigation | Year: 2013
This article studies the problem of joint detection and tracking of a target using multi-static Doppler-only measurements. The assumption is that in the surveillance volume of interest a single transmitter of known frequency is active with multiple spatially distributed receivers collecting and reporting Doppler-shift frequencies to the data fusion centre. The measurements are not only affected by additive noise but also contaminated by false detections and missed detections. The study develops for this application of a multi-sensor Bernoulli particle filter with information gain-driven receiver selection. The simulation results indicate robust performance of the proposed Bernoulli particle filter. © The Institution of Engineering and Technology 2013.
Baldini G.,European Commission |
Karanasios S.,University of Leeds |
Allen D.,University of Leeds |
Vergari F.,Selex ES
IEEE Communications Surveys and Tutorials | Year: 2014
Public Safety (PS) organizations bring value to society by creating a stable and secure environment. The services they provide include protection of people, environment and assets and they address a large number of threats both natural and man-made, acts of terrorism, technological, radiological or environmental accidents. The capability to exchange information (e.g., voice and data) is essential to improve the coordination of PS officers during an emergency crisis and improve response efforts. Wireless communications are particularly important in field operations to support the mobility of first responders. Recent disasters have emphasized the need to enhance interoperability, capacity and broadband connectivity of the wireless networks used by PS organizations. This paper surveys the outstanding challenges in this area, the status of wireless communication technologies in this particular domain and the current regulatory, standardization and research activities to address the identified challenges, with a particular focus on USA and Europe. © 2014 IEEE.