Approach to Measure Field of View of Sun-Photometer Using Laser as Light Source

Abstract

Abstract:

Field of view (FOV) is the basic parameter of sun-photometer and also the key parameter for transfer calibration and inter-comparison of sun-photometers using an integrating sphere as light source in the laboratory. Obtaining high-precision FOV is important to improve the accuracy of sun-photometer calibration. Based on the matrix measurement method, a system using laser as a light source to measure the FOV of CE318 sun-photometer is developed, and then the FOV results of matrix method are compared with the transfer calibration method. The results indicate that the matrix measurement with laser has a FOV uncertainty of 0.4%~1.1%. Because of the movement during measurement process and divergence angle of sun, the FOV uncertainty based on matrix measurement with sun is about 1.3%~1.4% which is larger than the laser result. In addition, the more historical calibration records, the more accurate FOV can be obtained by using transfer calibration method by comparing with matrix approach with laser, which suggests that the transfer calibration method can obtain accurate FOV when historical records are enough.

Key words: field of view, matrix scan, laser, CE318 sun-photometer, transfer calibration method

CLC Number:

P414.5

LI Wei, LI Zheng-Qiang, YANG Ben-Yong, LI Bao-Sheng, LI Kai-Tao, LI Dong-Hui, XIE Yi-Song. Approach to Measure Field of View of Sun-Photometer Using Laser as Light Source[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(4): 315-322.

References

[1] Xie Yisong, Li Donghui, Li Kaitao, et al. Aerosol optical and microphysical properties in haze days based on ground-based remote sensing measurements [J]. Journal of Remote Sensing, 2013, 17(4):970-980(in Chinese). 谢一凇, 李东辉, 李凯涛, 等. 基于地基遥感的灰霾气溶胶光学及微物理特性观测 [J]. 遥感学报, 2013, 17(4): 970-980.
[2] Wang Ling, Li Zhengqiang, et al. Retrieval of aerosol chemical composition from ground-based remote sensing data of sun-sky radiometers during haze days in Beijing winter [J]. Journal of Remote Sensing, 2013, 17(4): 944-958(in Chinese).
王玲, 李正强, 等. 利用太阳-天空辐射计遥感观测反演北京冬季灰霾气溶胶成分含量 [J]. 遥感学报, 2013, 17(4): 944-958.
[3] Zhang Yuhuan, Li Zhengqiang, Hou Weizhen, et al. Retrieval of haze aerosol optical depth based on high spatial resolution CCD of HJ-1 [J]. Journal of Remote Sensing, 2013, 17(4): 959-969(in Chinese).
张玉环, 李正强, 侯伟真, 等. 利用HJ-1 CCD高分辨率传感器反演灰霾气溶胶光学厚度 [J]. 遥感学报, 2013, 17(4): 959-969.
[4] Lv Yang, Li Zhengqiang, Yin Pengfei, et al. Joint use of ground-based LIDAR and sun-sky radiometer for observation of aerosol vertical distribution [J]. Journal of Remote Sensing, 2013, 17(4): 1008-1020(in Chinese).
吕阳, 李正强, 尹鹏飞, 等. 结合地基激光雷达和太阳辐射计的气溶胶垂直分布观测 [J].遥感学报, 2013, 17(4): 1008-1020.
[5] Holben B N, Eck T F, Slutsker I, et al. AERONET - A federated instrument network and data archive for aerosol characterization [J]. Remote Sens. Environ., 1998, 66(1): 1-16.
[6] Holben B N, Tanré D, Smirnov A, et al. An emerging ground-based aerosol climatology: Aerosol optical depth from AERONET [J]. J. Geophys. Res.-Atmos., 2001, 106(D11): 12067-12097.
[7] Yan Hao, Jiao Meiyan, Bi Baogui, et al. Advances in aerosol observation network and corresponding science plan [J]. Journal of the Meteorological Sciences, 2006, (26): 111-117(in Chinese).
延昊, 矫梅燕, 毕宝贵, 等. 国内外气溶胶观测网络发展进展及相关科学计划 [J]. 气象科学, 2006, (26):111-117.
[8] Li Z Q, Blarel L, Podvin T, et al. Transferring the calibration of direct solar irradiance to diffuse-sky radiance measurements for CIMEL Sun-sky radiometers [J]. Appl. Opt., 2008, (47): 1368-1377.
[9] Li Z Q, Goloub P, Blarel L, et al. Method to intercalibrate sunphotometer constants using an integrating sphere as a light source in the laboratory [J]. Appl. Opt., 2013, (52): 2226-2234.
[10]Zhao F S, Tan Y B, Li Z Q, et al. The effect and correction of aerosol forward scattering on retrieval of aerosol optical depth from Sun photometer measurements [J]. Geophys. Res. Lett., 2012, 39(14): L14805.
[11] Sinyuk A, Holben B N, Smirnov A, et al. Assessment of error in aerosol optical depth measured by AERONET due to aerosol forward scattering [J]. Geophys. Res. Lett., 2012, 39(23): L23806.
[12] Torres B, Toledano1 C, Berj´on A, et al. Measurements on pointing error and field of view of Cimel-318 Sunphotometers in the scope of AERONET [J]. Atmos. Meas. Tech., 2013(6): 2207–2220.
[13] Nakajima T, Tonna G, Rao R, et al. Use of sky brightness measurements from ground for remote sensing of particulate polydispersions [J]. Appl. Opt., 1996, (35): 2672–2686.
[14] Li Zhengqiang, Li Donghui, Li Kaitao, et al. A Sun/sky-radiometer observation network with the extension of multi-wavelength polarization measurements [J]. Journal of Remote Sensing, 2015, 19(3): 496-520(in Chinese).
李正强,李东辉,李凯涛,等.扩展多波长偏振测量的太阳辐射计观测网[J].遥感学报,2015,19(3): 496-520.
[15] Reda I, Andreas A. Solar position algorithm for solar radiation applications [J]. Solar Energy, 2007, 76(5): 577-589.