Direct atmospheric correction for high precision radiometry on infrared small target

Cai Lihua; Li Zhou; Yu Yi; Zhang Chunlin; Huang Zhiguo

doi:10.3788/IRLA201847.S104002

Atmospheric correction is one of important steps to obtain the intrinsic radiance of the target for an infrared radiometry system. Traditionally, the mean to calculate atmospheric transmittance and atmospheric path radiance are calculated by an atmospheric radiance transport calculation software. A method based on standard reference direct amending atmospheric attenuation was proposed, which was applied for high precision precision measurement and inversion on a small target. The based principle and procedure of this method were introduced, and then the model of wide dynamic calibration was employed. Radiometric experiments were performed on a mid-wave infrared system with a 600 mm aperture. The radiometry results indicated that the radiance inversion precision for a small target, using the proposed method, is 0.97%-1.03%, while the precision using a conventional atmospheric transport calculation software method is 7.30%-7.36%, which demonstrates that the proposed method provides a high-precision result.

Direct atmospheric correction for high precision radiometry on infrared small target

1. Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;

2. University of Chinese Academy of Sciences,Beijing 100049,China

Received Date: 2018-02-07

Rev Recd Date: 2018-05-03

Publish Date: 2018-06-25

Key words:

Abstract: Atmospheric correction is one of important steps to obtain the intrinsic radiance of the target for an infrared radiometry system. Traditionally, the mean to calculate atmospheric transmittance and atmospheric path radiance are calculated by an atmospheric radiance transport calculation software. A method based on standard reference direct amending atmospheric attenuation was proposed, which was applied for high precision precision measurement and inversion on a small target. The based principle and procedure of this method were introduced, and then the model of wide dynamic calibration was employed. Radiometric experiments were performed on a mid-wave infrared system with a 600 mm aperture. The radiometry results indicated that the radiance inversion precision for a small target, using the proposed method, is 0.97%-1.03%, while the precision using a conventional atmospheric transport calculation software method is 7.30%-7.36%, which demonstrates that the proposed method provides a high-precision result.

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Reference (13)

[1]	Ochs M, Schulz A, Bauer H J. High dynamic range infrared thermography by pixel-wise radiometric self-calibration[J]. Infrared Physics and Technology, 2010, 53:112-119.
[2]	Sun Z Y, Chang S T, Zhu W. Radiometric calibration method for large aperture infrared system with broad dynamic range[J]. Applied Optics, 2011, 54(15):4659-4666.
[3]	Li Z, Qiao Y, Chang S, et al. High-speed calibration algorithm for wide dynamic range infrared radiometric system[J]. Infrared and Laser Engineering, 2017, 46(6):0617003. (in Chinese)
[4]	Wei H L, Chen X H, Rao R Z, et al. A moderate spectral resolution transmittance model based on fitting the line by line calculation[J]. Optics Express, 2007, 15(13):8360-8370.
[5]	Wei H L, Chen X H, Zhan J. Atmospheric correction in the measurement of infrared radiance[J]. Atmosphere and Environmental Optics, 2007, 2(6):472-478. (in Chinese)
[6]	Yang C Y, Zhang J P, Cao L H, et al. Infrared radiation measurement based on real-time correction[J]. Journal of Infrared and Millimeter Waves, 2011, 30(3):284-288. (in Chinese)
[7]	Li M, Zong X. In-lab system-level BRDF measurement method of calibration diffuser[J]. Infrared and Laser Engineering, 2017, 46(1):0117004. (in Chinese)
[8]	Chang S T, Zhang Y Y, Sun Z Y, et al. Method to remove the effect of ambient temperature on radiometric calibration[J]. Applied Optics, 2014, 53:6274-6279.
[9]	Sun Z Y, Chang S T, Zhu W. Radiation calibration method for infrared system with large aperture and broad dynamic range[J]. Acta Optica Sinica, 2014, 34(7):0712006. (in Chinese)
[10]	Qu H M, Chen Q. Surrounding temperature compensation for infrared focal plane arrays non-uniformity correction[J]. Infrared and Laser Engineering, 2011, 40(12):2328-2332. (in Chinese)
[11]	Lou H L, Lv X Y, Zhou Y P, et al. Infrared radiation contrast between ground target and background[J]. Infrared and Laser Engineering, 2012, 41(8):2002-2007. (in Chinese)
[12]	Chang S T, Sun Z Y, Zhang X Y, et al. Radiation measurement of small target based on PSF[J]. Optics Precision Engineering, 2014, 22(11):2879-2887. (in Chinese)
[13]	Tang Y Q, Sun Q, Zhao J, et al. Combined nonuniformity correction algorithm of infrared focal plane arrays based on substrate temperature[J]. Infrared and Laser Engineering, 2016, 45(3):0304002. (in Chinese)

Direct atmospheric correction for high precision radiometry on infrared small target

doi: 10.3788/IRLA201847.S104002

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