星载大气痕量气体差分吸收光谱仪基于太阳的在轨辐射定标
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摘要
基于整机双向散射分布函数(Bi-directional scattering distribution function, BSDF),星载大气痕量气体差分吸收光谱仪(Environmental trace gases monitoring instrument, EMI)在轨可完成基于太阳的辐射定标,整机BSDF表征了EMI观测光路和定标光路辐射特性的关系。观测光路辐射定标已在地面完成,定标光路辐射特性定标在轨基于太阳完成,进而得到了整机BSDF参数,基于此实现了EMI在轨基于太阳的辐射定标。结果表明在可比光谱范围内,与TROPOMI(Tropospheric ozone-monitoring instrument)载荷交叉比对结果的差异在5%～6.5%以内。
On-orbit radiometric calibration of spaceborne differential optical absorption spectrometer can be conducted based on the bi-directional scattering distribution function(BSDF) and the sun. The EMI BSDF is the ratio of EMI radiance and irradiance calibration function. Radiometric calibration of observation path is completed on the ground.Radiometric calibration of calibration path can be realized by the sun. Then EMI BSDF is obtained, and the on-orbit radiometric calibration is conducted. The results between the EMI and TROPOMI show that the accuracy of the radiance calibration is 5%～6.5%.
On-orbit radiometric calibration of spaceborne differential optical absorption spectrometer can be conducted based on the bi-directional scattering distribution function(BSDF) and the sun. The EMI BSDF is the ratio of EMI radiance and irradiance calibration function. Radiometric calibration of observation path is completed on the ground.Radiometric calibration of calibration path can be realized by the sun. Then EMI BSDF is obtained, and the on-orbit radiometric calibration is conducted. The results between the EMI and TROPOMI show that the accuracy of the radiance calibration is 5%～6.5%.
引文
[1]Zhao Minjie, Si Fuqi, Jiang Yu, et al. In-lab calibration of space-borne differential optical absorption spectrometer[J]. Optics and Precision Engineering, 2013, 21(3):567-573(in Chinese).赵敏杰,司福祺,江宇.等.星载大气痕量气体差分吸收光谱仪的实验室定标[J].光学精密工程,2013, 21(3):567-573.
[2] Zhou Haijin, Liu Wenqing, Si Fuqi, et al.Spectral calibration for space-borne differential optical absorption spectrometer[J]. Spectroscopy and Spectral Analysis, 2012, 32(11):2881-2885(in Chinese).周海金,刘文清,司福祺,等.星载大气痕量气体差分吸收光谱仪光谱定标技术研究[J].光谱学与光谱分析,2012,32(11):2881-2885.
[3] Keski-Kuha R A M, Blumenstock G M, Fleetwood C M, et al. Effects of space exposure on ion-beam-deposited silicon-carbide and boron-carbide coatings[J]. Applied Optics, 1998, 37(34):8038-8042.
[4] Pellicori S F, Martinez C L, Hausgen P, et al. Development and testing of coatings for orbital space radiation environments[J]. Applied Optics, 2014, 53(4):A339-A350.
[5] Zhao Minjie, Si Fuqi, Liu Cheng, et al. The effect of AO/UV/RD exposure on space-borne diffusers:A comparative experiment[J]. Applied Optics, 2015, 54(31):9157-9166.
[6] Voors R, de Vries J, Bhatti I S, et al. TROPOMI, the Sentinel 5 precursor instrument for air quality and climate observations:status of the current design[C]. International Conference on Space Optics-ICSO, 2012, 10564:10564Q.
[7] De Vries J, Laan E C, Hoogeveen R W M, et al. TROPOMI:Solar backscatter satellite instrument for air quality and climate[C]. Proceedings of SPIE, 2007, 6744:674409.
[2] Zhou Haijin, Liu Wenqing, Si Fuqi, et al.Spectral calibration for space-borne differential optical absorption spectrometer[J]. Spectroscopy and Spectral Analysis, 2012, 32(11):2881-2885(in Chinese).周海金,刘文清,司福祺,等.星载大气痕量气体差分吸收光谱仪光谱定标技术研究[J].光谱学与光谱分析,2012,32(11):2881-2885.
[3] Keski-Kuha R A M, Blumenstock G M, Fleetwood C M, et al. Effects of space exposure on ion-beam-deposited silicon-carbide and boron-carbide coatings[J]. Applied Optics, 1998, 37(34):8038-8042.
[4] Pellicori S F, Martinez C L, Hausgen P, et al. Development and testing of coatings for orbital space radiation environments[J]. Applied Optics, 2014, 53(4):A339-A350.
[5] Zhao Minjie, Si Fuqi, Liu Cheng, et al. The effect of AO/UV/RD exposure on space-borne diffusers:A comparative experiment[J]. Applied Optics, 2015, 54(31):9157-9166.
[6] Voors R, de Vries J, Bhatti I S, et al. TROPOMI, the Sentinel 5 precursor instrument for air quality and climate observations:status of the current design[C]. International Conference on Space Optics-ICSO, 2012, 10564:10564Q.
[7] De Vries J, Laan E C, Hoogeveen R W M, et al. TROPOMI:Solar backscatter satellite instrument for air quality and climate[C]. Proceedings of SPIE, 2007, 6744:674409.