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21 November 2017 High resolution earth observation from geostationary orbit by optical aperture synthesys
M. Mesrine, E. Thomas, S. Garin, P. Blanc, C. Alis, F. Cassaing, D. Laubier
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Proceedings Volume 10567, International Conference on Space Optics — ICSO 2006; 105670B (2017) https://doi.org/10.1117/12.2308095
Event: International Conference on Space Optics 2006, 2006, Noordwijk, Netherlands
Abstract
In this paper, we describe Optical Aperture Synthesis (OAS) imaging instrument concepts studied by Alcatel Alenia Space under a CNES R&T contract in term of technical feasibility. First, the methodology to select the aperture configuration is proposed, based on the definition and quantification of image quality criteria adapted to an OAS instrument for direct imaging of extended objects. The following section presents, for each interferometer type (Michelson and Fizeau), the corresponding optical configurations compatible with a large field of view from GEO orbit. These optical concepts take into account the constraints imposed by the foreseen resolution and the implementation of the co-phasing functions. The fourth section is dedicated to the analysis of the co-phasing methodologies, from the configuration deployment to the fine stabilization during observation. Finally, we present a trade-off analysis allowing to select the concept wrt mission specification and constraints related to instrument accommodation under launcher shroud and in-orbit deployment.
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M. Mesrine, E. Thomas, S. Garin, P. Blanc, C. Alis, F. Cassaing, and D. Laubier "High resolution earth observation from geostationary orbit by optical aperture synthesys", Proc. SPIE 10567, International Conference on Space Optics — ICSO 2006, 105670B (21 November 2017); https://doi.org/10.1117/12.2308095
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KEYWORDS
Interferometers
Mirrors
Telescopes
Image quality
Image processing
Michelson interferometers
Modulation transfer functions
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