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Volume 40 Issue 12
Dec.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(12): 1780-1785.
He Xiaoyu, Xu Xiaojian. Multispectral imaging simulation of sea-sky background scene[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1780-1785. doi: 10.13700/j.bh.1001-5965.2014.0009(in Chinese)
Citation: He Xiaoyu, Xu Xiaojian. Multispectral imaging simulation of sea-sky background scene[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1780-1785. doi: 10.13700/j.bh.1001-5965.2014.0009(in Chinese)
shu

Multispectral imaging simulation of sea-sky background scene

doi: 10.13700/j.bh.1001-5965.2014.0009

  • School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 09 Jan 2014
  • Publish Date: 20 Dec 2014
    Abstract
  • When an infrared sensor observes sea surfaces at a high zenith angle of the sensor, both sea and sky backgrounds are in the field of view (FOV). By calculating the radiance received by each pixel of the sensor, multispectral optical images of sea-sky background can be obtained. To calculate the reflected radiance of sea surfaces varying with viewing direction under given sea conditions, traditional sea surface radiative characteristic model was modified based on geometrical optics theory. Since the length of transmission path varies with vertical FOV, the effects of atmosphere on radiative transfer are obvious. The radiance of sky light and horizontal path was calculated using a modified atmospheric radiative transfer model. The modified model has higher spectral resolution and is suitable for multispectral imaging simulation. With the improved models, several sea-sky background images were simulated at different time and viewing angles covering the visible up to long wavelength infrared spectral bands, separately. Simulation results are coincident with physical principles. The comparison between simulated and measured images validates the reliability of the new model.

     

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