Dr. Xiaoyu He Profile

Dr. Xiaoyu He

at Beihang Univ

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Publications (7)

Proceedings Article | 20 November 2024 Presentation + Paper

Modeling of atmospheric radiative transfer with polarization effects using scattering phase matrix

Mengfan Zou, Jianhua Li, Xiaojian Xu, Xiaoyu He

Proceedings Volume 13193, 131930J (2024) https://doi.org/10.1117/12.3030986

KEYWORDS: Atmospheric particles, Polarization, Aerosols, Scattering, Atmospheric modeling, Radiative transfer, Matrices, Mie scattering, Rayleigh scattering, Transmittance

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Solar radiation will be scattered by atmospheric molecules and aerosol particles when it transfers through the Earth atmosphere. The scattered radiance with different polarization state can be used to characterize atmospheric components. Based on the BHU-ATM presented in our previous work, an atmospheric radiative transfer model considering the polarization effects is developed in this paper, in which the parameter discretization method is used. To this end, the radiative transfer equation is adapted into the Stokes vector form, while the impacts of atmospheric molecules and aerosols on the polarization state of the scattered radiance are represented by means of the scattering phase matrix. The Curtis-Godson approximation and the two-stream approximation are used to obtain the analytical solution of the adapted radiative transfer equation. As the precise calculation of the scattering phase matrix varying with the scattering angle and the radiant wavelength is inefficient for the calculation of spectral path radiance, a novel aspect of this work is the efficient computation of the scattering phase matrix through a two-dimensional interpolation method, significantly reducing computational complexity while maintaining accuracy across a broad range of angles and wavelengths. The simulation results of the atmospheric transmittance, the spectral radiance and the degree of polarization (DOP) for an arbitrarily selected transfer path are given. As it can be seen, in the spectrum from the visible through the near infrared (VNIR), the polarization modeling showed a maximum transmittance difference of 0.0007 and a spectral radiance difference of 0.3W/m²/μm/sr. The DOP varied significantly, with a difference of up to 0.12 between urban and ocean aerosols. The developed polarization model can improve aerosol component identification in satellite-based remote sensing applications, aiding in more accurate air quality monitoring and enhancing climate models that account for aerosol scattering effects.

Proceedings Article | 20 November 2024 Presentation

Cloud detection for multispectral images of space-based Earth observational sensors using imagery simulation model

Xiaoyu He, Ouning Zhu, Mengfan Zou, Shaoping Shuai, Xiaojian Xu

Proceedings Volume 13193, 131930I (2024) https://doi.org/10.1117/12.3028896

KEYWORDS: Clouds, Multispectral imaging, Earth observing sensors, Image sensors, Sensors, Atmospheric sensing, Atmospheric physics, Windows, Satellites, Image processing

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Proceedings Article | 1 November 2024 Presentation + Paper

Multiresolution components fused evaluation for hyperspectral atmospheric radiative transfer model using feature selective validation

Shaoping Shuai, Jun Ma, Jia Liu, Xiaoyu He, Xiaojian Xu

Proceedings Volume 13199, 131990C (2024) https://doi.org/10.1117/12.3031448

KEYWORDS: Fused deposition modeling, Atmospheric modeling, Data modeling, Histograms, Radiative transfer, Wavelets, Spectral resolution, Reflection, Computer simulations, Atmospheric particles

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Proceedings Article | 9 October 2018 Paper

Optimal band analysis for dim target detection in space-variant sky background

Xiaoyu He, Xiaojian Xu

Proceedings Volume 10795, 107950N (2018) https://doi.org/10.1117/12.2503530

KEYWORDS: Sensors, Target detection, Signal to noise ratio, Atmospheric modeling, Atmospheric sensing, Infrared sensors, Image sensors

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Proceedings Article | 2 September 2015 Paper

Dim target trajectory-associated detection in bright earth limb background

Penghui Chen, Xiaojian Xu, Xiaoyu He, Yuesong Jiang

Proceedings Volume 9596, 95960C (2015) https://doi.org/10.1117/12.2187700

KEYWORDS: Target detection, Signal to noise ratio, Image segmentation, Hough transforms, Binary data, Sensors, Interference (communication), Digital breast tomosynthesis, Image analysis, Numerical simulations

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Proceedings Article | 1 September 2015 Paper

Fast calculation of scattered radiance in multispectral imagery simulation

Xiaoyu He, Xiaojian Xu

Proceedings Volume 9608, 96080O (2015) https://doi.org/10.1117/12.2187621

KEYWORDS: Earth's atmosphere, Infrared imaging, Infrared sensors, Sensors, Atmospheric modeling, Matrices, Radiative transfer, Transmittance, Multispectral imaging, Scattering

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Proceedings Article | 7 October 2014 Paper

Contrast analysis of space-based Earth observation infrared system

Xiaoyu He, Xiaojian Xu

Proceedings Volume 9249, 92490F (2014) https://doi.org/10.1117/12.2067106

KEYWORDS: Earth's atmosphere, Sensors, Transmittance, Infrared imaging, Infrared sensors, Infrared radiation, Target detection, Electro optical modeling, Performance modeling, Atmospheric modeling

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Showing 5 of 7 publications

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