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Proceedings Paper • Open Access

Hydra multiple head star sensor and its in-flight self-calibration of optical heads alignment
Author(s): L. Majewski; L. Blarre; N. Perrimon; Y. Kocher; P.E. Martinez; S. Dussy

Paper Abstract

HYDRA is EADS SODERN new product line of APS-based autonomous star trackers. The baseline is a multiple head sensor made of three separated optical heads and one electronic unit. Actually the concept which was chosen offers more than three single-head star trackers working independently. Since HYDRA merges all fields of view the result is a more accurate, more robust and completely autonomous multiple-head sensor, releasing the AOCS from the need to manage the outputs of independent single-head star trackers.

Specific to the multiple head architecture and the underlying data fusion, is the calibration of the relative alignments between the sensor optical heads. The performance of the sensor is related to its estimation of such alignments.

HYDRA design is first reminded in this paper along with simplification it can bring at system level (AOCS). Then self-calibration of optical heads alignment is highlighted through descriptions and simulation results, thus demonstrating the performances of a key part of HYDRA multiple-head concept.

Paper Details

Date Published: 21 November 2017
PDF: 8 pages
Proc. SPIE 10566, International Conference on Space Optics — ICSO 2008, 105660T (21 November 2017); doi: 10.1117/12.2308228
Show Author Affiliations
L. Majewski, EADS-SODERN (France)
L. Blarre, EADS-SODERN (France)
N. Perrimon, EADS-SODERN (France)
Y. Kocher, EADS-SODERN (France)
P.E. Martinez, CNES (France)
S. Dussy, European Space Research and Technology Ctr. (Netherlands)

Published in SPIE Proceedings Vol. 10566:
International Conference on Space Optics — ICSO 2008
Josiane Costeraste; Errico Armandillo; Nikos Karafolas, Editor(s)

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