Výsledky vyhledávání - "ESA/ESTEC, Noordwijk"

Vibration and shock testing of a 50 mm aperture unimorph deformable mirror

Autor: Leitz, Sinje, Gerhards, Maximilian, Verpoort, Sven, Wittrock, Ulrich, Freudling, Maximilian, Grzesik, Andreas, Erhard, Markus, Hallibert, Pascal, ESA/ESTEC, Noordwijk

We present our latest results on a reﬁned unimorph deformable mirror which was developed in the frame of the ESA GSTP activity ”Enabling Technologies for Piezo-Based Deformable Mirrors in Active Optics Correction Chains”. The identiﬁed baseli

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36448c15adfa3ba4e7c3720b400775d4

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Space-qualified piezo based deformable mirror for future instruments with active optics

Autor: Freudling, Maximilian, Grzesik, Andreas, Erhard, Markus, Gerhards, Maximilian, Leitz, Sinje, Verpoort, Sven, Wittrock, Ulrich, Hallibert, Pascal, ESA/ESTEC, Noordwijk

This paper presents the results of the technology development project “Enabling Technologies for Piezo-Based Deformable Mirrors in Active Optics Correction Chains” conducted by OHB System AG together with its partner Münster University of Applie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::074e337b2b6b3d708ae0a75632ddd090

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REVLANSYS: Mission and GNC Design of Terminal Entry and Landing Missions for Advanced Re-Entry Vehicles

Autor: Deimos Space S.R.L., Bucharest, Romania, Medici Giovanni, Ionita Alina, Yabar Valles Celia, DE Zaiacomo Gabriele, Kerr Murray, Pina Caballero Fernando, Russo Antonio, Esa-Estec, Noordwijk, Netherlands, Deimos Space S.L.U., Tres Cantos, Spain, Recupero Cristina

Publikováno v: INCAS Bulletin, Vol 10, Iss 2, Pp 75-90 (2018)

The ESA REVLANSYS study aims to develop key technologies in the field of Mission Engineering and GNC for autonomous re-entry vehicles, and to derive coherent mission, system and GNC requirements for the specific terminal entry and landing phases. As

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ea03fab67c7802de3331dc93dd97b83
https://doi.org/10.13111/2066-8201.2018.10.2.8

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Dust-to-Gas and Refractory-to-Ice Mass Ratios of Comet 67P/Churyumov-Gerasimenko from Rosetta Observations

Autor: Ekkehard Kührt, Nicolas Biver, Dominique Bockelée-Morvan, Raphael Marschall, Mathieu Choukroun, Matthew Taylor, Nicolas Thomas, Kathrin Altwegg, Martin Hilchenbach, Martin Pätzold, Alain Herique, Joanna Drążkowska

Publikováno v: Journal Space Science Reviews
Journal Space Science Reviews, 2020, ⟨10.1007/s11214-020-00662-1⟩
Space Science Reviews
Space Science Reviews, Springer Verlag, 2020, 216 (3), ⟨10.1007/s11214-020-00662-1⟩
Choukroun, Mathieu; Altwegg, Kathrin; Kührt, Ekkehard; Biver, Nicolas; Bockelée-Morvan, Dominique; Drążkowska, Joanna; Hérique, Alain; Hilchenbach, Martin; Marschall, Raphael; Pätzold, Martin; Taylor, Matthew G. G. T.; Thomas, Nicolas (2020). Dust-to-Gas and Refractory-to-Ice Mass Ratios of Comet 67P/Churyumov-Gerasimenko from Rosetta Observations. Space science reviews, 216(3) Springer 10.1007/s11214-020-00662-1

This chapter reviews the estimates of the dust-to-gas and refractory-to-ice mass ratios derived fromRosettameasurements in the lost materials and the nucleus of 67P/Churyumov-Gerasimenko, respectively. First, the measurements byRosettainstruments are

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8edb1abfc88dabeef4078d0931e14770
https://hal.archives-ouvertes.fr/hal-03021621

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Des mesures de radiométrie avancées et des applications des sciences de la Terre avec l'Expérience de Prisme aéroporté (APEX)

Publikováno v: Remote Sensing of Environment
Remote Sensing of Environment, Elsevier, 2015, 158 (1), pp.207-219. ⟨10.1016/j.rse.2014.11.014⟩
Remote Sensing of Environment, 158

We present the Airborne Prism Experiment (APEX), its calibration and subsequent radiometric measurements as well as Earth science applications derived from this data. APEX is a dispersive pushbroom imaging spectrometer covering the solar reflected wa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bda9c0a06ed133b78d06f9747641d23e
https://doi.org/10.1016/j.rse.2014.11.014

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Multibeam by Metasurface Antennas

Autor: Stefano Maci, David Gonzalez-Ovejero, Goutam Chattopadhyay, G. Minatti

Publikováno v: IEEE Transactions on Antennas and Propagation
IEEE Transactions on Antennas and Propagation, Institute of Electrical and Electronics Engineers, 2017, 65 (6), pp.2923-2930. ⟨10.1109/TAP.2017.2670622⟩
IEEE Transactions on Antennas and Propagation, 2017, 65 (6), pp.2923-2930. ⟨10.1109/TAP.2017.2670622⟩

We explore various possibilities for designing multibeam antennas using a single metasurface (MTS) aperture. Both single-source and multisource feeding schemes are considered. For the single-source case, two approaches are investigated. In the first

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9354f1b6287527ac918113d0b74b98ec
https://hal-univ-rennes1.archives-ouvertes.fr/hal-02133513

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Dynamic secondary electron emission in dielectric/conductor mixed

Autor: Olano, Leandro, Montero, Isabel, Dávila, María E., Jacas, A., Rodriguez, M. A., Dennison, JR

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
Conference Proceedings

Oral presentation given at the 9th International Workshop on Multipactor, Corona and Passive Intermodulation (2017) on April 5-7th, 2017.
Secondary Emission Yield (SEY) of dielectric materials have a huge importance for prediction and test of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::b0cd81ef66f253d556e8fc868dcd3ffb
http://hdl.handle.net/10261/187816

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The ISL Langmuir probe experiment processing onboard DEMETER: Scientific objectives, description and first results

Autor: Z. Kozacek, Jean-Pierre Lebreton, D. Klinge, Milan Maksimovic, B. Poirier, Pavel M. Trávníček, Pierre-Louis Blelly, D. Lagoutte, S. Merikallio, Štěpán Štverák, M. Salaquarda

Publikováno v: Planetary and Space Science
Planetary and Space Science, Elsevier, 2006, 54 (5), pp.472-486. ⟨10.1016/j.pss.2005.10.017⟩
Planetary and Space Science, 2006, 54 (5), pp.472-486. ⟨10.1016/j.pss.2005.10.017⟩

International audience; The DEMETER Langmuir probe experiment, called “Instrument Sonde de Langmuir” (ISL), has been designed for in situ measurements of the bulk parameters of the ionospheric thermal plasma. The ISL instrument is comprised of tw

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fae7b04aa40dc75940030991644bce9e
https://doi.org/10.1016/j.pss.2005.10.017

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Combination of the SRC images and radio-tracking data of Mars Express for improving the Phobos' gravity field determination from close flyby(s)

Autor: Rosenblatt, Pascal, Lainey, Valéry, Oberst, Jürgen, Hoffmann, Harald, Neukum, Gerhard, Dehant, Véronique, Marty, Jean-Charles, Witasse, Olivier

Publikováno v: EGU General Assembly Conference Abstracts
EGU General Assembly Conference Abstracts, Apr 2013, Vienna, Austria

International audience; The determination of the gravity field of Phobos up to second-order terms is the main objective of future close flybys of the Martian moon by Mars Express (MEX). Such flybys at close distance (typically less than 60 km from th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a9097d8559d8a70057f54f7ca1de86bc
https://hal.science/hal-03743332

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Density modulated whistler mode emissions observed near the plasmapause

Autor: Moullard, O., Arnaud Masson, Laakso, H., Parrot, M., Décréau, P., Santolik, O., Andre, M.

Publikováno v: HAL
Scopus-Elsevier
Geophysical Research Letters
Geophysical Research Letters, American Geophysical Union, 2002, 17, pp.1861-1861

International audience; Electron density fluctuations are regularly observed near the plasmapause together with electromagnetic waves below the electron cyclotron frequency (usually called hiss or chorus). Instruments on board CLUSTER spacecraft ofte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::03c62acbb3db4b857347ae48c5f36924
https://hal-insu.archives-ouvertes.fr/insu-01558789

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