An Investigation on Inter-Calibrating EMI/GF-5 With TROPOMI/S5p in Ultraviolet-Visible Spectra
文献类型：期刊论文
| 作者 | Wang, Qian1,2,3,4; Zhang, Peng1,4; Xu, Na1,4; Chen, Lin1,4; Wu, Ronghua1,4; Liu, Jianguo5 ; Si, Fuqi5
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| 刊名 | IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
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| 出版日期 | 2022 |
| 卷号 | 60 |
| 关键词 | Instruments Satellite broadcasting Radiometry Electromagnetic interference Atmospheric modeling Calibration Absorption Double difference (DD) EMI grating-based spectrometers inter-calibration TROPOspheric Monitoring Instrument (TROPOMI) |
| ISSN号 | 0196-2892 |
| DOI | 10.1109/TGRS.2022.3214828 |
| 通讯作者 | Zhang, Peng(zhangp@cam.gov.cn) |
| 英文摘要 | Inter-calibration is a general method to harmonize the in-orbit spectral radiance of the target instrument with the reference instrument in the visible and infrared spectra. This study proposes and applies an inter-calibration method to the space-based Ultraviolet and visible spectra (UVIS) grating radiometers. Based on pixel pairs derived from simultaneous nadir overpasses (SNO), the in-orbit spectral radiances from the environmental trace gas monitoring instrument onboard the Chinese high-resolution remote sensing satellite GaoFen-5 (EMI/GF-5) and the TROPOspheric Monitoring Instrument onboard the Sentinel-5 Precursor satellite (TROPOMI/S5p) are compared through the double difference (DD) method, where the individual window channel method is also adopted for comparison. Uncertainties from SNO thresholds, instrument spectral specification, and radiative transfer simulation are estimated. The SNO thresholds, including time, distance, viewing angle, and scene uniformity of 300 s, 3 km, 0.01, and 0.01, are determined to get collocations for UVIS instruments. Several factors, including instrument line shape (ILS), instrument spectral accuracy, reference solar spectrum, surface albedo, and atmospheric polarization, can influence the radiometric difference obtained by the DD method. Accurate SAO2010 solar spectrum and wavelength accuracy can substantially reduce the dependence of radiometric difference on wavelength. Errors introduced by scalar approximation and parameterized ILS can be neglected. The surface albedo greatly affects the simulated radiance at wavelengths longward of 330 nm. The results show that radiometric differences obtained by using the DD method are consistent with those derived from the individual window channel method, with a discrepancy of 0.4%. An ocean-land calibration difference of 1.5% is found between EMI and TROPOMI at the UVIS band. Inter-calibration using the DD method can minimize the spectral variations in full spectral radiance inter-comparison for grating hyperspectral instruments, and the radiometric difference can be estimated comprehensively. The wavelength dependence can also be easily derived from the results of the DD method. The DD method is recommended for radiometric comparison for UVIS hyperspectral spectrometers. |
| WOS关键词 | SENTINEL-5 PRECURSOR ; RADIOMETRIC CALIBRATION ; BOARD ; PAYLOAD |
| 资助项目 | National Key Research and Development Program of China[2018YFB0504900] ; National Key Research and Development Program of China[2018YFB0504800] |
| WOS研究方向 | Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000879050800001 |
| 出版者 | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
| 资助机构 | National Key Research and Development Program of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/130377]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Zhang, Peng |
| 作者单位 | 1.China Meteorol Adm, Key Lab Radiometr Calibrat & Validat Environm Sat, Natl Satellite Meteorol Ctr, Natl Ctr Space Weather, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Peoples R China 4.Innovat Ctr FengYun Meteorol Satellite, Beijing 100081, Peoples R China 5.Chinese Acad Sci CASHIPS, Anhui Inst Opt & Fine Mech AIOFM, Hefei Inst Phys Sci, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Qian,Zhang, Peng,Xu, Na,et al. An Investigation on Inter-Calibrating EMI/GF-5 With TROPOMI/S5p in Ultraviolet-Visible Spectra[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2022,60. |
| APA | Wang, Qian.,Zhang, Peng.,Xu, Na.,Chen, Lin.,Wu, Ronghua.,...&Si, Fuqi.(2022).An Investigation on Inter-Calibrating EMI/GF-5 With TROPOMI/S5p in Ultraviolet-Visible Spectra.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,60. |
| MLA | Wang, Qian,et al."An Investigation on Inter-Calibrating EMI/GF-5 With TROPOMI/S5p in Ultraviolet-Visible Spectra".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 60(2022). |
入库方式： OAI收割
来源：合肥物质科学研究院
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