DIRECT OPTICAL HIGH SPEED DOWNLINKS AND GROUND STATION NETWORKS FOR SMALL LEO MISSIONS [PDF]
, 2010 Direct microwave data downlink capacity of today’s earth observation satellites is limited in terms of available spectrum, transmission data rate, and power consumption.
Giggenbach, Dirk +3 more
core
On the role of satellite communications for emergency situations with a focus on Europe [PDF]
, 2011 International audienceIn this paper, we describe how satellite communications may contribute to disaster management. During emergency situations, satellite communications present many advantages in supporting or replacing a terrestrial infrastructure (if
Matteo Berioli +14 more
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Evaluation of remote sensing techniques for estimation of forest variables at stand level [PDF]
, 2006 There is a continuous need for accurate forest description. Forest data at stand level is required in forestry planning, in particular when scheduling treatments within the next few years.
Magnusson, Mattias
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On the Feasibility of Laser Satellite Communications from the Martian Surface
IAF Space Communications and Navigation SymposiumFree space optical (FSO) communication using lasers is a rapidly developing field in telecommunications that can offer advantages over traditional radio frequency technology. For example, optical laser links may allow transmissions at far higher data rates, require less operating power and smaller systems and have a smaller risk of interception.
Fernandez Rodriguez, E. +2 more
openaire +3 more sources
Enhanced Data Return from Lunar Farside using RF-Optical TT and C [PDF]
, 2008 Science return and high bandwidth communications are key issues to support the foreseen endeavours on spaceflights to the Moon and beyond. For a given mass, power consumption and volume, laser communications can offer an increase in TM bandwidth over ...
Giggenbach, Dirk +5 more
core
Effects of atmospheric turbulence on fiber-coupled DPSK system in Satellite-to-Ground downlink
Results in Physics, 2018 Fiber-coupled differential phase-shift keying (DPSK) modulation is potentially an effective approach for further high-speed satellite lasercom, due to the high detection sensitivity, low linewidth requirements, and uncalled-for complex phase-locked loop ...
Qingbo Yang +6 more
doaj +1 more source
Excimer laser treatment of ZE41 magnesium alloy for corrosion resistance and microhardness improvement [PDF]
, 2010 We would like to acknowledge the financial support of the ‘‘Conseil regional de PACA’’ and Protection des Metaux d’Arenc). The authors are grateful to PMA’s engineers Ms. E. Castellan, Ms. A. Gonthier and Mr. F.
KHALFAOUI, Walid +3 more
core +1 more source
Diversity and diaspora: Arab communities and satellite communication in Europe
, 2008 Since the late 1990s, Europe's satellite television landscape has been transformed, with European populations of non-European heritage increasingly watching television channels in their own languages.
Sakr, N.
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Influence of various process conditions on surface finishes induced by the direct metal deposition laser technique on a Ti–6Al–4V alloy [PDF]
, 2012 The direct metal deposition (DMD) with laser is a free-form metal deposition process for manufacturing dense pieces, which allows generating a prototype or small series of near net-shape structures. One of the most critical issues is that produced pieces
GORNY, Cyril +7 more
core +1 more source
Laser adhesion test for thermal sprayed coatings on textured surface by laser [PDF]
, 2016 The laser shock adhesion test (LASAT) is a technique allowing the generation of high tensile stresses in materials. The LASAT consists in focusing a pulsed laser beam on a water-confined target.
BOUSTIE, Michel +15 more
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