Dr. Zhong Dong Yang Profile

Dr. Zhong Dong Yang

at Chinese Meteorological Administration

SPIE Involvement:

Author

Proceedings Article | 26 November 2014 Paper

The radiometric performance of FY-3A/B MERSI reflective solar bands

Ling Sun, Na Xu, Xiuqing Hu, Zhiguo Rong, Zhongdong Yang, Naimeng Lu

Proceedings Volume 9264, 92640U (2014) https://doi.org/10.1117/12.2069056

KEYWORDS: MODIS, Calibration, Sensors, Reflectivity, Data modeling, Meteorological satellites, Satellites, Short wave infrared radiation, Environmental sensing, Imaging systems

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Proceedings Article | 26 November 2014 Paper

Performance assessment of FY-3C/MERSI on early orbit

Xiuqing Hu, Na Xu, Ronghua Wu, Lin Chen, Min Min, Ling Wang, Hanlie Xu, Ling Sun, Zhongdong Yang, Peng Zhang

Proceedings Volume 9264, 92640Y (2014) https://doi.org/10.1117/12.2071190

KEYWORDS: Calibration, Reflectivity, Signal to noise ratio, Modulation transfer functions, Sensors, Mirrors, MODIS, Satellites, Interference (communication), Image resolution

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Proceedings Article | 8 November 2014 Paper

Spectral parameters and signal-to-noise ratio requirement for TANSAT hyper spectral remote sensor of atmospheric CO2

Qian Wang, Zhong-Dong Yang, Yan-Meng Bi

Proceedings Volume 9259, 92591T (2014) https://doi.org/10.1117/12.2067572

KEYWORDS: Carbon dioxide, Spectral resolution, Sensors, Signal to noise ratio, Atmospheric modeling, Transmittance, Atmospheric sensing, Absorption, Spectroscopy, Satellites

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With the stable increase of carbon dioxide (CO₂) concentrations, space based measurements of CO² concentration in lower atmosphere by reflected sunlight in near infrared band has become a hot research topic at present. Recently, the instruments sensitive to total CO₂column data in near-surface have become available through the SCIAMACHY instrument on ENVISAT and TANSO-FTS on GOSAT. The developing hyper spectral CO₂ detector in China carried by TANSAT will be launched in late 2015. Hyper spectral CO₂detector is designed to provide global measurements of CO₂ in lower troposphere. It employs high resolution spectra of reflected sunlight taken simultaneously in near-infrared CO2 (1.61μm and 2.06μm) and O2 (0.76μm) bands. Associating climate change with the observation requirements of carbon sources and sinks, the feasibility of making CO2 column concentration measurements with high-resolution and high-precision is studied by high resolution atmosphere radiation transfer model. The effects of key specifications of the hyper spectral CO₂detector such as spectral resolution, sampling ratio and sign-to-noise ratio (SNR) on CO₂detection are analyzed combining the scientific requirements of CO₂measurements of China. The typical characteristics of hyper spectral CO2 detector on TANSAT are grating spectrometer and array-based detector. To achieve the column averaged atmospheric CO2 dry air mole fraction (XCO₂) precision requirements of 1×10^-6-4×10^-6, hyper spectral CO₂ detector should provide high resolution at first to resolve CO₂ absorption lines from continuous spectra of reflected sunlight. Compared to a variety of simulated spectral resolutions, the spectral resolution of hyper spectral CO₂ detector on TANSAT can resolve CO₂ spectral features and maintain the moderate radiance sensitivity. Since small size array detector-based instruments may suffer from undersampling of the spectra, the influences of spectral undersampling to CO₂absorption spectra are studied, the results indicate that sampling ratio should exceed 2 pixels/FWHM to ensure the accuracy of CO₂spectrum. Signal-to-noise ratio is one of the most important parameters of hyper spectral CO₂ detectors to ensure the reliability of CO₂signal. SNR requirements of CO₂ detector to different detection precisions are explored based on the radiance sensitivity factors. The results show that it is difficult to achieve the SNR to detect 1×10^-6-4×10^-6CO2 concentration change in the boundary layer by solar shortwave infrared passive remote sensing, limited by the instrument development at present. However, the instrument SNR to detect 1% change in the CO₂ column concentration is attainable. The results of this study are not only conductive to universal applications and guides on developing grating spectrometer, but also helpful to have a better understanding of the complexity of CO₂ retrieval.

Proceedings Article | 8 November 2014 Paper

Impacts of aerosol and albedo on TanSat CO2 retrieval using the near infrared CO2 bands

Yanmeng Bi, Zhongdong Yang, Songyan Gu, Qian Wang, Ling Gao, Jie Chen

Proceedings Volume 9259, 925915 (2014) https://doi.org/10.1117/12.2066123

KEYWORDS: Aerosols, Carbon dioxide, Scattering, Atmospheric particles, Atmospheric modeling, Absorption, Satellites, Spectral resolution, MODIS, Near infrared

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SPIE Journal Paper | 1 August 2009

Study on automatic airborne image positioning model and its application in FY-3A airborne experiment

Lei Yang, Zhongdong Yang, Min Guan, Liyang Zhang, Tiantian Wang

JARS, Vol. 3, Issue 01, 033541, (August 2009) https://doi.org/10.1117/12.10.1117/1.3216563

KEYWORDS: Sensors, Mirrors, Computing systems, Data modeling, Mathematical modeling, Image sensors, Space telescopes, Telescopes, Imaging systems, Image processing

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Proceedings Article | 16 June 2003 Paper

Destriping for MODIS data via wavelet shrinkage

Zhongdong Yang, Jun Li, W. Paul Menzel, Richard Frey

Proceedings Volume 4895, (2003) https://doi.org/10.1117/12.466514

KEYWORDS: MODIS, Wavelets, Clouds, Sensors, Continuous wavelet transforms, Remote sensing, Discrete wavelet transforms, Wavelet transforms, Satellites, Fourier transforms

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Showing 5 of 6 publications

Conference Committee Involvement (1)

Remote Sensing of the Atmosphere, Clouds, and Precipitation V

13 October 2014 | Beijing, China

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