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Proceedings Paper • Open Access

Laser ranging interferometer on Grace follow-on
Author(s): C. Dahl; A. Baatzsch; M. Dehne; F. Gilles; P. Hager; M. Herding; K. Nicklaus; K. Voss; K. Abich; C. Braxmaier; M. Gohlke; B. Guenther; J. Sanjuan; B. Zender; G. F. Barranco; A. Görth; C. Mahrdt; V. Müller; D. Schütze; G. Stede; G. Heinzel

Paper Abstract

The Gravity Recovery and Climate Experiment (GRACE) is a successful Earth observation mission launched in 2002 consisting of two identical satellites in a polar low-Earth orbit [1]. The distance variations between these two satellites are measured with a Micro Wave Instrument (MWI) located in the central axis. In data postprocessing the spatial and temporal variations of the Earth’s gravitational field are recovered, which are among other things introduced by changing groundwater levels or ice-masses [2, 3, 4, 5]. The Laser Ranging Interferometer (LRI) on-board the GRACE Follow-On (GFO) mission, which will be launched in 2017 by the joint collaboration between USA (NASA) and Germany (GFZ), is a technology demonstrator to provide about two orders of magnitude higher measurement accuracy than the initial GRACE MWI, about 80 nm/√Hz in the measurement band between 2 mHz and 0.1 Hz. The integration of the LRI units on both GFO S/C has been finished in summer 2016. The design as well as the functional, performance, and thermal-vacuum tests results of the German LRI flight units will be presented.

Paper Details

Date Published: 25 September 2017
PDF: 9 pages
Proc. SPIE 10562, International Conference on Space Optics — ICSO 2016, 105623V (25 September 2017); doi: 10.1117/12.2297705
Show Author Affiliations
C. Dahl, SpaceTech GmbH (Germany)
A. Baatzsch, SpaceTech GmbH (Germany)
M. Dehne, SpaceTech GmbH (Germany)
F. Gilles, SpaceTech GmbH (Germany)
P. Hager, SpaceTech GmbH (Germany)
M. Herding, SpaceTech GmbH (Germany)
K. Nicklaus, SpaceTech GmbH (Germany)
K. Voss, SpaceTech GmbH (Germany)
K. Abich, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
C. Braxmaier, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
M. Gohlke, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
B. Guenther, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
J. Sanjuan, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
B. Zender, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
G. F. Barranco, Max-Planck-Institut für Gravitationsphysik (Germany)
A. Görth, Max-Planck-Institut für Gravitationsphysik (Germany)
C. Mahrdt, Max-Planck-Institut für Gravitationsphysik (Germany)
V. Müller, Max-Planck-Institut für Gravitationsphysik (Germany)
D. Schütze, Max-Planck-Institut für Gravitationsphysik (Germany)
G. Stede, Max-Planck-Institut für Gravitationsphysik (Germany)
G. Heinzel, Max-Planck-Institut für Gravitationsphysik (Germany)

Published in SPIE Proceedings Vol. 10562:
International Conference on Space Optics — ICSO 2016
Bruno Cugny; Nikos Karafolas; Zoran Sodnik, Editor(s)

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