Dr. Chaoyu Song Profile

Dr. Chaoyu Song

at CRESDA

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Author

Publications (3)

Proceedings Article | 5 November 2020 Paper

Preliminary study on the multispectral measurement simulations of polarized scanning atmospheric corrector image

Weizhen Hou, Yanqing Xie, Zhengqiang Li, Hongji Yang, Zhongzheng Hu, Chaoyu Song, Jun Lin, Honglian Huang, Xuefeng Lei, Bangyu Ge, Yan Ma

Proceedings Volume 11566, 115660E (2020) https://doi.org/10.1117/12.2577500

KEYWORDS: Polarization, Satellites, Atmospheric modeling, Aerosols, Satellite imaging, Radiative transfer

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Environment-2 (HJ-2) A/B satellites will be launched in 2020, which are expected to work as the successors of Environment-1 (HJ-1) satellites in Chinese Environment and Disaster Monitoring and Prediction Satellite Constellation. A new space-borne instrument called Polarized Scanning Atmospheric Corrector (PSAC) also will be onboard HJ-2 satellites, aiming to provide the atmospheric properties for synchronous atmospheric correction of the main sensors, such as the charge-coupled device cameras onboard the same satellite. PSAC is a cross-track scanning polarimeter with polarized channels from near-ultraviolet to shortwave infrared, centered in 410, 443, 555, 670, 865, 910, 1380, 1610 and 2250 nm. In order to test the performance of inversion algorithms and software modules, synthetic data simulated by the vector radiative transfer is indispensable. In this paper, the regional simulation of PSAC multispectral measurements are preliminarily studied, and the Unified Linearized Vector Radiative Transfer Model (UNL-VRTM) has been used as the forward model. For the observation geometries, the viewing zenith angles are calculated by the linear interpolation over the cross-track scanning angle range from west to east, while the viewing azimuth angle are simulated by following the azimuth angle distribution of other corresponding satellite. By taking the vegetated surface type as an example, the multispectral Lambertian surface reflectance and wavelength-independent BPDF model are used in the forward simulation, and different aerosol optical depth with fine-dominated and coarse-dominated aerosols are considered. In this way, the multispectral measurements can be obtained by the forward simulations over a regional grid with the predefined latitude and longitude, and further analysis are carried out based on the synthetic data. Thus, this study can provide key support to the testbed of inversion algorithms and software modules before and after the satellite launch.

Proceedings Article | 18 December 2019 Paper

Study on errors propagation in synchronous atmospheric correction for HJ-2 satellites

Weizhen Hou, Zhengqiang Li, Chaoyu Song, Jun Lin, Yan Ma, Bangyu Ge, Fengxun Zheng

Proceedings Volume 11338, 113380V (2019) https://doi.org/10.1117/12.2542736

KEYWORDS: Satellites, Atmospheric corrections, Error analysis, Aerosols, Atmospheric modeling, CCD cameras, Remote sensing, Vegetation

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SPIE Journal Paper | 4 December 2018

Compensation method of edge spectral response for interferometric spectrometer

Jun Lin, Ningfang Liao, Chaoyu Song

OE, Vol. 57, Issue 12, 123101, (December 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.12.123101

KEYWORDS: Spectroscopy, Interferometry, Image processing, Optical filters, Image quality, Fourier transforms, Imaging systems, Hyperspectral imaging, Spectral resolution, Staring arrays

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