SmartScan: a robust pushbroom imaging concept for moderate spacecraft attitude stability

K. Janschek; V. Tchernykh; S. Dyblenko; B. Harnisch

doi:10.1117/12.2308124

21 November 2017 SmartScan: a robust pushbroom imaging concept for moderate spacecraft attitude stability

K. Janschek, V. Tchernykh, S. Dyblenko, B. Harnisch

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Proceedings Volume 10567, International Conference on Space Optics — ICSO 2006; 105671J (2017) https://doi.org/10.1117/12.2308124
Event: International Conference on Space Optics 2006, 2006, Noordwijk, Netherlands

Abstract

Pushbroom scan cameras with linear image sensors, commonly used for Earth observation from satellites, require high attitude stability during the image acquisition. Especially noticeable are the effects of high frequency attitude variations originating from micro shocks and vibrations, produced by momentum and reaction wheels, mechanically activated coolers, steering and deployment mechanics and other reasons. The SMARTSCAN imaging concept offers high quality imaging even with moderate satellite attitude stability on a sole opto-electronic basis without any moving parts. It uses real-time recording of the actual image motion in the focal plane of the remote sensing camera during the frame acquisition and a posteriori correction of the obtained image distortions on base of the image motion record. Exceptional real-time performances with subpixel accuracy image motion measurement are provided by an innovative high-speed onboard optoelectronic correlation processor. SMARTSCAN allows therefore using smart pushbroom cameras for hyper-spectral imagers on satellites and platforms which are not specially intended for imaging missions, e.g. micro satellites. The paper gives an overview on the system concept and main technologies used (advanced optical correlator for ultra high-speed image motion tracking), it discusses the conceptual design for a smart compact space camera and it reports on airborne test results of a functional breadboard model.

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K. Janschek, V. Tchernykh, S. Dyblenko, and B. Harnisch "SmartScan: a robust pushbroom imaging concept for moderate spacecraft attitude stability", Proc. SPIE 10567, International Conference on Space Optics — ICSO 2006, 105671J (21 November 2017); https://doi.org/10.1117/12.2308124

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KEYWORDS

Image sensors

Sensors

Image processing

Satellites

Cameras

Optical correlators

Satellite imaging

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