scholarly journals State-of-the-art of photorefractive holographic interferometry and potentialities for space applications

2018 ◽  
Author(s):  
Marc Georges ◽  
Philippe Lemaire ◽  
Gilles Pauliat ◽  
Jean-Claude Launay ◽  
Gérald Roosen
Keyword(s):  
Holographic Interferometry ◽  
State Of The Art ◽  
Space Applications

Benchmarking Deep Learning for On-Board Space Applications

2021 ◽  
Vol 13 (19) ◽  
pp. 3981
Author(s):  
Maciej Ziaja ◽  
Piotr Bosowski ◽  
Michal Myller ◽  
Grzegorz Gajoch ◽  
Michal Gumiela ◽  
...  
Keyword(s):  
Deep Learning ◽  
Experimental Validation ◽  
State Of The Art ◽  
Learning Algorithms ◽  
Real Life ◽  
Space Applications ◽  
Deep Model ◽  
Learning Techniques ◽  
Standard Tool ◽  
Benchmark Datasets

Benchmarking deep learning algorithms before deploying them in hardware-constrained execution environments, such as imaging satellites, is pivotal in real-life applications. Although a thorough and consistent benchmarking procedure can allow us to estimate the expected operational abilities of the underlying deep model, this topic remains under-researched. This paper tackles this issue and presents an end-to-end benchmarking approach for quantifying the abilities of deep learning algorithms in virtually any kind of on-board space applications. The experimental validation, performed over several state-of-the-art deep models and benchmark datasets, showed that different deep learning techniques may be effectively benchmarked using the standardized approach, which delivers quantifiable performance measures and is highly configurable. We believe that such benchmarking is crucial in delivering ready-to-use on-board artificial intelligence in emerging space applications and should become a standard tool in the deployment chain.

scholarly journals Borosilicate Glass MEMS Lorentz Force Magnetometer

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 788
Author(s):  
Matthias Kahr ◽  
Matthias Domke ◽  
Harald Steiner ◽  
Wilfried Hortschitz ◽  
Michael Stifter
Keyword(s):  
Thermal Shock ◽  
Borosilicate Glass ◽  
Thermal Shock Resistance ◽  
Dynamic Range ◽  
State Of The Art ◽  
Stability Control ◽  
Wide Dynamic Range ◽  
Space Applications ◽  
Shock Resistance ◽  
Critical Requirement

This paper reports on a novel, miniaturized magnetomechanical transducer/sensor made of borosilicate glass with wide dynamic range. The prototype is manufactured with laser micromachining and ablation techniques. Compared to state of the art, borosilicate glass substrate offers the highest thermal shock resistance and is best suited for MEMS magnetometers, for aerospace and space applications or magnetic monitoring systems for diagnostics and plasma stability control of nuclear fusion experiments, where thermal shock resistance is a critical requirement.

scholarly journals Characterization and Design of Photovoltaic Solar Cells That Absorb Ultraviolet, Visible and Infrared Light

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 78
Author(s):  
Sara Bernardes ◽  
Ricardo A. Marques Lameirinhas ◽  
João Paulo N. Torres ◽  
Carlos A. F. Fernandes
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
State Of The Art ◽  
Infrared Light ◽  
Maximum Efficiency ◽  
Space Applications ◽  
Figures Of Merit ◽  
The World ◽  
Photovoltaic Solar Cells ◽  
Lattice Matched

The world is witnessing a tide of change in the photovoltaic industry like never before; we are far from the solar cells of ten years ago that only had 15–18% efficiency. More and more, multi-junction technologies seem to be the future for photovoltaics, with these technologies already hitting the mark of 30% under 1-sun. This work focuses especially on a state-of-the-art triple-junction solar cell, the GaInP/GaInAs/Ge lattice-matched, that is currently being used in most satellites and concentrator photovoltaic systems. The three subcells are first analyzed individually and then the whole cell is put together and simulated. The typical figures-of-merit are extracted; all the I−V curves obtained are presented, along with the external quantum efficiencies. A study on how temperature affects the cell was done, given its relevance when talking about space applications. An overall optimization of the cell is also elaborated; the cell’s thickness and doping are changed so that maximum efficiency can be reached. For a better understanding of how varying both these properties affect efficiency, graphic 3D plots were computed based on the obtained results. Considering this optimization, an improvement of 0.2343% on the cell’s efficiency is obtained.

scholarly journals Quantum technologies in space

2021 ◽  
Author(s):  
Rainer Kaltenbaek ◽  
Antonio Acin ◽  
Laszlo Bacsardi ◽  
Paolo Bianco ◽  
Philippe Bouyer ◽  
...  
Keyword(s):  
Research And Development ◽  
Secure Communication ◽  
State Of The Art ◽  
International Competition ◽  
Design Development ◽  
Space Applications ◽  
Computing Power ◽  
Digital Era ◽  
Quantum Technology ◽  
Complete Framework

AbstractRecently, the European Commission supported by many European countries has announced large investments towards the commercialization of quantum technology (QT) to address and mitigate some of the biggest challenges facing today’s digital era – e.g. secure communication and computing power. For more than two decades the QT community has been working on the development of QTs, which promise landmark breakthroughs leading to commercialization in various areas. The ambitious goals of the QT community and expectations of EU authorities cannot be met solely by individual initiatives of single countries, and therefore, require a combined European effort of large and unprecedented dimensions comparable only to the Galileo or Copernicus programs. Strong international competition calls for a coordinated European effort towards the development of QT in and for space, including research and development of technology in the areas of communication and sensing. Here, we aim at summarizing the state of the art in the development of quantum technologies which have an impact in the field of space applications. Our goal is to outline a complete framework for the design, development, implementation, and exploitation of quantum technology in space.

Ceramic Microwave Circuits for Satellite Communication

2009 ◽  
Vol 6 (1) ◽  
pp. 27-31 ◽  
Author(s):  
R. Kulke ◽  
G. Möllenbeck ◽  
C. Günner ◽  
P. Uhlig ◽  
K.H. Drüe ◽  
...  
Keyword(s):  
Satellite Communication ◽  
State Of The Art ◽  
Development Project ◽  
Test Results ◽  
Space Applications ◽  
Passive Components ◽  
Space Agency ◽  
German Research ◽  
Satellite Applications ◽  
Circuit Technology

KERAMIS is the acronym of a German research and development project funded by the German Space Agency (DLR) and the Federal Ministry of Economics and Technology (BMWI). The consortium is developing an RF circuit technology for Ka band multimedia satellite applications. A set of modules has been designed, manufactured, and tested by the partners of the consortium. The goal of this effort is to qualify the KERAMIS technology for space applications and to participate in an on-orbit-verification (OOV) program of the DLR. The launch of the technology verification satellite (TET) is scheduled for late 2010. This paper will give an overview of innovative circuit and module designs as well as the assembly, integration, and test results of the project. The authors will present a modular circuit concept for state-of-the-art transmitters and receivers in space at around 20 GHz. Selected modules are a 4 × 4 switch matrix, two synthesizers, and other RF modules. All circuits are based on multilayer ceramic (LTCC) including passive components, transitions, housings, and DC supply.

scholarly journals ScOSA system software: the reliable and scalable middleware for a heterogeneous and distributed on-board computer architecture

2021 ◽  
Author(s):  
Andreas Lund ◽  
Zain Alabedin Haj Hammadeh ◽  
Patrick Kenny ◽  
Vishav Vishav ◽  
Andrii Kovalov ◽  
...  
Keyword(s):  
Computer Architecture ◽  
Distributed System ◽  
High Performance ◽  
State Of The Art ◽  
Space Applications ◽  
Trade Off ◽  
Flight Experiment ◽  
Performance Space ◽  
Commercial Off The Shelf ◽  
The Individual

AbstractDesigning on-board computers (OBC) for future space missions is determined by the trade-off between reliability and performance. Space applications with higher computational demands are not supported by currently available, state-of-the-art, space-qualified computing hardware, since their requirements exceed the capabilities of these components. Such space applications include Earth observation with high-resolution cameras, on-orbit real-time servicing, as well as autonomous spacecraft and rover missions on distant celestial bodies. An alternative to state-of-the-art space-qualified computing hardware is the use of commercial-off-the-shelf (COTS) components for the OBC. Not only are these components cheap and widely available, but they also achieve high performance. Unfortunately, they are also significantly more vulnerable to errors induced by radiation than space-qualified components. The ScOSA (Scalable On-board Computing for Space Avionics) Flight Experiment project aims to develop an OBC architecture which avoids this trade-off by combining space-qualified radiation-hardened components (the reliable computing nodes, RCNs) together with COTS components (the high performance nodes, HPNs) into a single distributed system. To abstract this heterogeneous architecture for the application developers, we are developing a middleware for the aforementioned OBC architecture. Besides providing an monolithic abstraction of the distributed system, the middleware shall also enhance the architecture by providing additional reliability and fault tolerance. In this paper, we present the individual components comprising the middleware, alongside the features the middleware offers. Since the ScOSA Flight Experiment project is a successor of the OBC-NG and the ScOSA projects, its middleware is also a further development of the existing middleware. Therefore, we will present and discuss our contributions and plans for enhancement of the middleware in the course of the current project. Finally, we will present first results for the scalability of the middleware, which we obtained by conducting software-in-the-loop experiments of different sized scenarios.

Practical Picture Processing

1974 ◽  
Vol 32 ◽  
pp. 338-339
Author(s):  
T. A. Welton
Keyword(s):  
Radiation Damage ◽  
Coherence Length ◽  
Spatial Information ◽  
State Of The Art ◽  
Coherent Radiation ◽  
The State ◽  
Energy Spread ◽  
Electron Micrograph ◽  
Picture Processing ◽  
Molecular Skeleton

Various authors have emphasized the spatial information resident in an electron micrograph taken with adequately coherent radiation. In view of the completion of at least one such instrument, this opportunity is taken to summarize the state of the art of processing such micrographs. We use the usual symbols for the aberration coefficients, and supplement these with £ and 6 for the transverse coherence length and the fractional energy spread respectively. He also assume a weak, biologically interesting sample, with principal interest lying in the molecular skeleton remaining after obvious hydrogen loss and other radiation damage has occurred.

A Macintosh Interface for the Cameca Camebax-Micro Electron Microprobe

1990 ◽  
Vol 48 (1) ◽  
pp. 438-439
Author(s):  
Carl E. Henderson
Keyword(s):  
Electron Microprobe ◽  
Processing Speed ◽  
Word Processing ◽  
State Of The Art ◽  
Computer Control ◽  
Third Party ◽  
Disk Storage ◽  
The Past ◽  
User Facility ◽  
Instrument Control

Over the past few years it has become apparent in our multi-user facility that the computer system and software supplied in 1985 with our CAMECA CAMEBAX-MICRO electron microprobe analyzer has the greatest potential for improvement and updating of any component of the instrument. While the standard CAMECA software running on a DEC PDP-11/23+ computer under the RSX-11M operating system can perform almost any task required of the instrument, the commands are not always intuitive and can be difficult to remember for the casual user (of which our laboratory has many). Given the widespread and growing use of other microcomputers (such as PC’s and Macintoshes) by users of the microprobe, the PDP has become the “oddball” and has also fallen behind the state-of-the-art in terms of processing speed and disk storage capabilities. Upgrade paths within products available from DEC are considered to be too expensive for the benefits received. After using a Macintosh for other tasks in the laboratory, such as instrument use and billing records, word processing, and graphics display, its unique and “friendly” user interface suggested an easier-to-use system for computer control of the electron microprobe automation. Specifically a Macintosh IIx was chosen for its capacity for third-party add-on cards used in instrument control.

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