Journal article
Directional Polarimetric Camera (DPC): Monitoring aerosol spectral optical properties over land from satellite observation
Journal of quantitative spectroscopy & radiative transfer, Vol.218, pp.21-37
10/2018
DOI: 10.1016/j.jqsrt.2018.07.003
Abstract
•The DPC onboard GF-5 is introduced and aerosol retrieval capabilities are evaluated.•An inversion framework by taking full advantage of DPC measurements is developed.•An improved BRDF model is used to reduce the inversion complexity of surface.•Aerosol spectral optical parameters can be well retrieved over various conditions.
The Directional Polarimetric Camera (DPC) is the first Chinese multi-angle polarized earth observation satellite sensor, which will be launched onboard the GaoFen-5 Satellite in Chinese High-resolution Earth Observation Program. GaoFen-5 runs in a sun-synchronous orbit with an inclination angle of 98°, with the 13:30 PM local overpass time and the 2-days revisiting period. DPC employed a charge coupled device detection unit with 512 × 512 effective pixels from the 544 × 512 useful pixels, realizing spatial resolution of 3.3 km under a swath width of 1850 km. Meanwhile, DPC has 3 polarized channels (490, 670 and 865 nm) together with 5 non-polarized bands (443, 565, 763, 765 and 910 nm), and can obtain at least 9 viewing angles by continuously capturing series images over the same target on orbit. Based on the optimal estimation theory and improved bidirectional reflectance distribution function model, an inversion framework for the simultaneous retrieval of aerosol and surface parameters is presented by taking full advantage of available radiometric and polarimetric measurements. The retrieved wavelength-independent fine-mode and coarse-mode aerosol volumes are used to assess the DPC performance on the inversion capability of spectral aerosol optical depth (AOD), from which the Angstrom exponent and fine-mode fraction (FMF) could be further obtained. In addition, based on the synthetic DPC data for various observation geometries, aerosols and surface types, the aerosol inversion capabilities are systematically evaluated, and the information content analysis results show that the aerosol spectral optical properties can be well retrieved over various land surfaces.
Details
- Title: Subtitle
- Directional Polarimetric Camera (DPC): Monitoring aerosol spectral optical properties over land from satellite observation
- Creators
- Zhengqiang Li - State Environment Protection Key Laboratory of Satellite Remote Sensing, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, ChinaWeizhen Hou - State Environment Protection Key Laboratory of Satellite Remote Sensing, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, ChinaJin Hong - Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, ChinaFengxun Zheng - State Environment Protection Key Laboratory of Satellite Remote Sensing, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, ChinaDonggen Luo - Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, ChinaJun Wang - Department of Chemical and Biochemical Engineering, Center of Global and Regional Environmental Studies, and Informatics Initiative, University of Iowa, 4133 Seamans Center, Iowa City, IA 52242, USAXingfa Gu - State Environment Protection Key Laboratory of Satellite Remote Sensing, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, ChinaYanli Qiao - Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
- Resource Type
- Journal article
- Publication Details
- Journal of quantitative spectroscopy & radiative transfer, Vol.218, pp.21-37
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.jqsrt.2018.07.003
- ISSN
- 0022-4073
- eISSN
- 1879-1352
- Grant note
- name: National Key R&D Program of China, award: 2016YFE0201400; DOI: 10.13039/501100001809, name: National Natural Science Foundation of China, award: 41671367, 41505022; name: Open Fund of State Key Laboratory of Remote Sensing Science, award: OFSLRSS201710
- Language
- English
- Date published
- 10/2018
- Academic Unit
- Physics and Astronomy; Iowa Technology Institute; Civil and Environmental Engineering; Chemical and Biochemical Engineering; Electrical and Computer Engineering
- Record Identifier
- 9984104908902771
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