Abstract
More and more, hyperspectral images are envisaged to improve the aerial reconnaissance capability of airborne systems, both for civilian and military applications. To confirm the hopes put in this new way of imaging a scene, it is necessary to develop airborne systems allowing the measurement of the spectral signatures of objects of interest in real conditions, with high spectral and spatial resolutions. The purpose of this paper is to present the design and the first in-flight results of the dual-band infrared spectro-imaging system called Sieleters. This system has demonstrated simultaneously a ground sampling distance of 0.5m, associated with a spectral resolution of 11 cm(-1) for the Mid-Wave InfraRed (MWIR) and 5 cm(-1) for the Long-Wave InfraRed (LWIR).
Highlights
Hyperspectral imaging systems, combining the evaluation of a scene both in spatial and spectral dimensions, are more and more envisaged to increase the capabilities of airborne system in terms of aerial reconnaissance, for both civilian or military applications
The visible, Near InfraRed (NIR) and Short-Wave Infrared (SWIR) part of the system is developed by NEO, Norsk Elektro Optikk in Norway, under contract from the Norwegian defense research establishment (FFI); the infrared part and the processing part are directly developed by Onera
Our choice is to consider the modulation transfer function (MTF) of the reconstructed panchromatic image made of the superposition of all the N lines, after optimal compensation of the aircraft motion and Line Of Sight (LOS) residuals
Summary
Hyperspectral imaging systems, combining the evaluation of a scene both in spatial and spectral dimensions, are more and more envisaged to increase the capabilities of airborne system in terms of aerial reconnaissance, for both civilian or military applications. To confirm the hopes put in this new way of imaging a scene, it is necessary to develop an experimental airborne lab allowing the measurement of spectral signatures of the scenes, in real conditions. The hyperspectral images produced by this airborne lab will be of a great help for the design of future operational systems. DGA, the French Defence Procurement Agency, entrusted to Onera, the French Aerospace Lab, the development of an airborne hyperspectral imaging system called Sysiphe [1], covering atmospheric bands from the visible to the long wave infrared. The purpose of this paper is to focus on the infrared dual-band (MWIR and LWIR) spectroimaging system, called Sieleters, which obtained recently its first in-flight hyperspectral images. Sieleters is installed on a DO-228 aircraft, operated by DLR
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