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Institution

Airbus Defence and Space

CompanyModena, Italy
About: Airbus Defence and Space is a company organization based out in Modena, Italy. It is known for research contribution in the topics: Spacecraft & Signal. The organization has 2596 authors who have published 2229 publications receiving 15740 citations. The organization is also known as: Airbus Defence and Space GmbH & Airbus DS GmbH.
Topics: Spacecraft, Signal, Antenna (radio), Satellite, Radar


Papers
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Journal ArticleDOI
TL;DR: Gaia as discussed by the authors is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach.
Abstract: Gaia is a cornerstone mission in the science programme of the EuropeanSpace Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach. Both the spacecraft and the payload were built by European industry. The involvement of the scientific community focusses on data processing for which the international Gaia Data Processing and Analysis Consortium (DPAC) was selected in 2007. Gaia was launched on 19 December 2013 and arrived at its operating point, the second Lagrange point of the Sun-Earth-Moon system, a few weeks later. The commissioning of the spacecraft and payload was completed on 19 July 2014. The nominal five-year mission started with four weeks of special, ecliptic-pole scanning and subsequently transferred into full-sky scanning mode. We recall the scientific goals of Gaia and give a description of the as-built spacecraft that is currently (mid-2016) being operated to achieve these goals. We pay special attention to the payload module, the performance of which is closely related to the scientific performance of the mission. We provide a summary of the commissioning activities and findings, followed by a description of the routine operational mode. We summarise scientific performance estimates on the basis of in-orbit operations. Several intermediate Gaia data releases are planned and the data can be retrieved from the Gaia Archive, which is available through the Gaia home page.

5,164 citations

Journal ArticleDOI
Michele Armano1, Heather Audley2, G. Auger3, J. Baird4, Massimo Bassan5, Pierre Binétruy3, M. Born2, Daniele Bortoluzzi6, N. Brandt7, M. Caleno1, L. Carbone6, Antonella Cavalleri8, A. Cesarini6, Giacomo Ciani6, G. Congedo6, A. M. Cruise9, Karsten Danzmann2, M. de Deus Silva1, R. De Rosa, M. Diaz-Aguilo10, L. Di Fiore, Ingo Diepholz2, G. Dixon9, Rita Dolesi6, N. Dunbar7, Luigi Ferraioli11, Valerio Ferroni6, Walter Fichter, E. D. Fitzsimons12, R. Flatscher7, M. Freschi1, A. F. García Marín2, C. García Marirrodriga1, R. Gerndt7, Lluis Gesa10, Ferran Gibert6, Domenico Giardini11, R. Giusteri6, F. Guzmán2, Aniello Grado13, Catia Grimani14, A. Grynagier, J. Grzymisch1, I. Harrison15, Gerhard Heinzel2, M. Hewitson2, Daniel Hollington4, D. Hoyland9, Mauro Hueller6, Henri Inchauspe3, Oliver Jennrich1, Ph. Jetzer16, Ulrich Johann7, B. Johlander1, Nikolaos Karnesis2, B. Kaune2, N. Korsakova2, Christian J. Killow17, J. A. Lobo10, Ivan Lloro10, L. Liu6, J. P. López-Zaragoza10, R. Maarschalkerweerd15, Davor Mance11, V. Martín10, L. Martin-Polo1, J. Martino3, F. Martin-Porqueras1, S. Madden1, Ignacio Mateos10, Paul McNamara1, José F. F. Mendes15, L. Mendes1, A. Monsky2, Daniele Nicolodi6, Miquel Nofrarías10, S. Paczkowski2, Michael Perreur-Lloyd17, Antoine Petiteau3, P. Pivato6, Eric Plagnol3, P. Prat3, U. Ragnit1, B. Rais3, Juan Ramos-Castro18, J. Reiche2, D. I. Robertson17, H. Rozemeijer1, F. Rivas10, G. Russano6, J Sanjuán10, P. Sarra, A. Schleicher7, D. Shaul4, Jacob Slutsky19, Carlos F. Sopuerta10, Ruggero Stanga20, F. Steier2, T. J. Sumner4, D. Texier1, James Ira Thorpe19, C. Trenkel7, Michael Tröbs2, H. B. Tu6, Daniele Vetrugno6, Stefano Vitale6, V Wand2, Gudrun Wanner2, H. Ward17, C. Warren7, Peter Wass4, D. Wealthy7, W. J. Weber6, L. Wissel2, A. Wittchen2, A. Zambotti6, C. Zanoni6, Tobias Ziegler7, Peter Zweifel11 
TL;DR: The first results of the LISA Pathfinder in-flight experiment demonstrate that two free-falling reference test masses, such as those needed for a space-based gravitational wave observatory like LISA, can be put in free fall with a relative acceleration noise with a square root of the power spectral density.
Abstract: We report the first results of the LISA Pathfinder in-flight experiment. The results demonstrate that two free-falling reference test masses, such as those needed for a space-based gravitational wave observatory like LISA, can be put in free fall with a relative acceleration noise with a square root of the power spectral density of 5.2 +/- 0.1 fm s(exp -2)/square root of Hz, or (0.54 +/- 0.01) x 10(exp -15) g/square root of Hz, with g the standard gravity, for frequencies between 0.7 and 20 mHz. This value is lower than the LISA Pathfinder requirement by more than a factor 5 and within a factor 1.25 of the requirement for the LISA mission, and is compatible with Brownian noise from viscous damping due to the residual gas surrounding the test masses. Above 60 mHz the acceleration noise is dominated by interferometer displacement readout noise at a level of (34.8 +/- 0.3) fm square root of Hz, about 2 orders of magnitude better than requirements. At f less than or equal to 0.5 mHz we observe a low-frequency tail that stays below 12 fm s(exp -2)/square root of Hz down to 0.1 mHz. This performance would allow for a space-based gravitational wave observatory with a sensitivity close to what was originally foreseen for LISA.

523 citations

Journal ArticleDOI
TL;DR: This review has organised the literature by the unit of analysis and the comparison method used to identify change, significantly reducing the conceptual overlap present in previous reviews giving a succinct nomenclature with which to understand and apply change detection workflows.

409 citations

Journal ArticleDOI
TL;DR: The presented results show the good quality of the Sentinel-2 mission products both in terms of radiometry and geometry and provide an overview on next mission steps related to data quality aspects.
Abstract: As part of the Copernicus programme of the European Commission (EC), the European Space Agency (ESA) has developed and is currently operating the Sentinel-2 mission that is acquiring high spatial resolution optical imagery. This article provides a description of the calibration activities and the status of the mission products validation activities after one year in orbit. Measured performances, from the validation activities, cover both Top-Of-Atmosphere (TOA) and Bottom-Of-Atmosphere (BOA) products. The presented results show the good quality of the mission products both in terms of radiometry and geometry and provide an overview on next mission steps related to data quality aspects.

339 citations

Journal ArticleDOI
TL;DR: In this article, a nonlinear optical loop mirror with all polarization-maintaining fibers is used for robust mode-locked femtosecond (F2F) fiber laser.
Abstract: We report on a novel architecture for robust mode-locked femtosecond fiber lasers using a nonlinear optical loop mirror with all polarization-maintaining fibers. Due to a nonreciprocal phase shift, the loop mirror can be operated in a compact and efficient reflection mode, offering the possibility to reach high repetition rates and easy implementation of tuning elements. In particular, longitudinal mode spacing and carrier-envelope offset frequency may be controlled in order to operate the laser as an optical frequency comb. We demonstrate femtosecond pulse generation at three different wavelengths (1030, 1565, and 2050 nm) using Ytterbium, Erbium, and co-doped Thulium–Holmium as gain media, respectively. Robust operation is achieved for a wide range of parameters, including repetition rates from 10 to 250 MHz.

205 citations


Authors

Showing all 2599 results

NameH-indexPapersCitations
Markos Trichas458811730
Ulrich Schmid366175897
Stephen J. Sweeney342754609
Manfred Döring321203842
João Tedim301053532
Dietmar Koch221291674
J. Lebreton22371166
Michael Paulitsch21931510
Marc Bouchez211231456
Marianne Cerf20641381
Achim Bittner191041116
M. Trichas18211324
Gentian Jakllari17671746
Andreas Helwig1794910
Jan Mietzner16611244
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
20225
2021115
2020170
2019267
2018204