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Optical metrology terminal for satellite-to-satellite laser ranging

Mandel, Oliver and Chwalla, Michael and Schuldt, Thilo and Krauser, Jasper and Weise, Dennis and Braxmaier, Claus (2018) Optical metrology terminal for satellite-to-satellite laser ranging. In: Proceedings of the international conference on space optics. International Conference on Space Optics, Chania, Griechenland.

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Interferometric laser ranging is an enabling technology for high-precision satellite-to-satellite tracking within the context of earth observation, gravitational wave detection, or formation flying. In orbit, the measurement system is affected by environmental influences, particularly satellite attitude jitter and temperature fluctuations, demanding an instrument design, which has a high level of thermal stability and is insensitive to rotations around the satellite's center of mass. Different design approaches for a heterodyne dynamic laser ranging instrument have been combined to a new improved design concept that involves the inherent beam tracking capabilities of a retroreflector into a mono-axial configuration with nanometer accuracy. In order to facilitate the accommodation onboard a future satellite mission, the design allows for a continuously adjustable flexible phase center position. To cover large inter-spacecraft distances, the instrument design comprises an active transponder system, featuring a two-dimensional beam steering mechanism to align a local, strong laser to the (weak) input beam without affecting the measurement path. To this end, a dynamic laser ranging instrument is presented, which has compact dimensions and is fully integrated on a single Zerodur baseplate. The instrument performance will be evaluated in a dedicated test setup providing a flat-top beam simulating the laser beam received from a distant spacecraft, including a beam steering subsystem, which allows for monitoring of pathlength variations when the angle of incidence at the optical instrument is changing.

Item URL in elib:https://elib.dlr.de/122208/
Document Type:Conference or Workshop Item (Speech)
Title:Optical metrology terminal for satellite-to-satellite laser ranging
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mandel, OliverAirbus DSUNSPECIFIED
Chwalla, MichaelAstrium GmbH - SatellitesUNSPECIFIED
Schuldt, ThiloDLR-RY, BremenUNSPECIFIED
Krauser, JasperAirbus Defence and Space GmbHUNSPECIFIED
Weise, DennisAirbus DS GmbHUNSPECIFIED
Braxmaier, Clausclaus.braxmaier (at) dlr.deUNSPECIFIED
Journal or Publication Title:Proceedings of the international conference on space optics
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Satellite-to-Satellite tracking, laser interferometry, metrology, retroreflector, tilt-to-piston coupling, beam steering, differential wavefront sensing
Event Title:International Conference on Space Optics
Event Location:Chania, Griechenland
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Systems Engineering Optische Systeme (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Systems Enabling Technologies
Deposited By: Hüls, Simone
Deposited On:24 Oct 2018 11:17
Last Modified:24 Oct 2018 11:17

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