U
Ulrich Johann
Researcher at Airbus Defence and Space
Publications - 58
Citations - 1368
Ulrich Johann is an academic researcher from Airbus Defence and Space. The author has contributed to research in topics: Interferometry & Wavefront. The author has an hindex of 16, co-authored 58 publications receiving 1144 citations. Previous affiliations of Ulrich Johann include Airbus Group & Dornier Flugzeugwerke.
Papers
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Proceedings ArticleDOI
Design of a diode-pumped Nd:YAG laser communication system
TL;DR: In this paper, a detailed design study for an advanced optical communication system based on diode-pumped Nd:YAG laser technology performed within the framework of an ESA contract is presented.
NEOTωIST - An Asteroid Impactor Mission Featuring Sub-spacecraft for Enhanced Mission Capability
K. Engel,Mattia Pugliatti,Line Drube,Juan L. Cano,Siegfried Eggl,Daniel Hestroffer,Albert Falke,Ulrich Johann,Alan W. Harris +8 more
TL;DR: The NEOTωIST mission as discussed by the authors is a demonstration mission intended to develop the capabilities required to execute an effective kinetic impactor near Earth object (NEO) deflection mission.
Proceedings ArticleDOI
mSTAR: Testing special relativity in space using high performance optical frequency references
Thilo Schuldt,Shailendhar Saraf,Alberto Stochino,Klaus Döringshoff,Sasha Buchman,Grant D. Cutler,John A. Lipa,Si Tan,John Hanson,Belgacem Jaroux,Claus Braxmaier,Norman Gürlebeck,Sven Herrmann,Claus Lämmerzahl,Achim Peters,Abdul Alfauwaz,Abdulaziz Alhussien,Badr Alsuwaidan,Turki Al Saud,Hansjörg Dittus,Ulrich Johann,Simon P. Worden,Robert L. Byer +22 more
TL;DR: The mini Space-Time Asymmetry Research (mSTAR) project as mentioned in this paper aims at a test of special relativity by performing a clock-clock comparison experiment in a low-Earth orbit.
Proceedings ArticleDOI
LISA optical metrology: tilt-to-pathlength coupling effects on the picometer scale
Nils F. Hasselmann,Christina Brugger,Tim Vogel,Ewan D. Fitzsimsons,Ulrich Johann,Gerhard Heinzel,Dennis Weise,Alexander Sell +7 more
TL;DR: In-Field Pointing (IFP) as mentioned in this paper is a payload design employing the actuation of a tiltable mirror positioned in an intermediate pupil plane of a wide field off-axis telescope.
Journal ArticleDOI
Dealing with uncertainties in asteroid deflection demonstration missions: NEOTωIST
Siegfried Eggl,Daniel Hestroffer,Juan L. Cano,Javier Martín Ávila,Line Drube,Alan W. Harris,Albert Falke,Ulrich Johann,K. Engel,Stephen R. Schwartz,Patrick Michel +10 more
TL;DR: The role of uncertainties are discussed in the NEOTωIST asteroid deflection demonstration concept, a low-cost kinetic impactor design elaborated in the framework of the NEOShield project, and it is found that such a mission can indeed provide valuable constraints on mitigation relevant parameters.