Fast gradient-based algorithm on extended landscapes for wave-front reconstruction of Earth observation satellite

C. Thiebaut; L. Perraud; J. M. Delvit; C. Latry

doi:10.1117/12.2233355

27 July 2016 Fast gradient-based algorithm on extended landscapes for wave-front reconstruction of Earth observation satellite

C. Thiebaut, L. Perraud, J. M. Delvit, C. Latry

Author Affiliations +

Proceedings Volume 9909, Adaptive Optics Systems V; 99096V (2016) https://doi.org/10.1117/12.2233355
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

We present an on-board satellite implementation of a gradient-based (optical flows) algorithm for the shifts estimation between images of a Shack-Hartmann wave-front sensor on extended landscapes. The proposed algorithm has low complexity in comparison with classical correlation methods which is a big advantage for being used on-board a satellite at high instrument data rate and in real-time. The electronic board used for this implementation is designed for space applications and is composed of radiation-hardened software and hardware. Processing times of both shift estimations and pre-processing steps are compatible of on-board real-time computation.

Citation Download Citation

C. Thiebaut, L. Perraud, J. M. Delvit, and C. Latry "Fast gradient-based algorithm on extended landscapes for wave-front reconstruction of Earth observation satellite", Proc. SPIE 9909, Adaptive Optics Systems V, 99096V (27 July 2016); https://doi.org/10.1117/12.2233355

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