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

doi:10.1117/12.2542736

18 December 2019 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, AOPC 2019: Optical Sensing and Imaging Technology; 113380V (2019) https://doi.org/10.1117/12.2542736
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

Environment-2 (HJ-2) satellites will be launched after 2019, which are designed as the successor of Environment-1 (HJ- 1) satellites in Chinese Environment and Disaster Monitoring and Prediction Satellite Constellation. Different from HJ-1 satellites, a new multispectral single-viewing polarimetric instrument called Polarized Scanning Atmospheric Corrector (PSAC) will be onboard on HJ-2 satellites, and further provide the aerosol properties for synchronous atmospheric correction of the main sensors, such as the multispectral charge-coupled device (CCD) cameras onboard the same satellite. In this way, the multispectral surface reflectance could be further obtained from the remote sensing measurements of CCD cameras by the atmospheric correction with the retrieved aerosol properties from PSAC. In this paper, based on the optimal estimation (OE) theory and information content analysis method, we have a preliminary study on the propagation errors from the retrieved aerosol properties to multispectral surface reflectance in the process of synchronous atmospheric correction. The priori information and errors for the analysis are assumed based on the measurement noise of CCD cameras and a priori error of retrieved aerosol optical depth (AOD), as well as typical multispectral reflectance from USGS and ASTER spectral library. For the simulation of synthetic measurements of CCD cameras, Unified Linearized Vector Radiative Transfer Model (UNL-VRTM) has been used as the forward model. By this means, the posterior errors of multispectral surface reflectance are calculated, and the errors propagations can be evaluated theoretically, which can further provide key support for the study of synchronous atmospheric correction in HJ-2 satellites.

Citation Download Citation

Weizhen Hou, Zhengqiang Li, Chaoyu Song, Jun Lin, Yan Ma, Bangyu Ge, and Fengxun Zheng "Study on errors propagation in synchronous atmospheric correction for HJ-2 satellites", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 113380V (18 December 2019); https://doi.org/10.1117/12.2542736

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KEYWORDS

Satellites

Atmospheric corrections

Error analysis

Aerosols

Atmospheric modeling

CCD cameras

Remote sensing

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