Performance assessments of VIIRS DNB on-orbit radiometric calibration accuracy and stability on SNPP and NOAA-20

1.Key Laboratory of Quantitative Remote Sensing Information Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China;2.School of Optoelectronics, University of Chinese Academy of Sciences, Beijing 100049, China

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Supported by the National Key Research and Development Program of China (2018YFB0504600), National Natural Science Foundation of China (61801457), the Bureau of International Co-operation Chinese Academy of Sciences (181811KYSB20160040), and Key Research Program of Frontier Sciences, CAS (QYZDB-SSW-JSC051).

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    Based on the characteristic of anisotropic reflectance of nighttime TOA (top-of-atmosphere), a new method was proposed to evaluate the accuracy of on-orbit radiometric calibration of nighttime sensors using a relative accurate simulation of the nighttime radiative transfer. Specially, the Antarctic Dome C site was selected as the study area, and the nighttime on-orbit radiance was simulated by the MT2009 (Miller-Turner 2009) TOA lunar irradiance model and TOA BRDF (Bidirectional Reflectance Distribution Function) model. After the analysis of the consistency of VIIRS DNB (Visible Infrared Imaging Radiometer Suit Day/Night Band) observed and simulated radiance under the same geometry, it was found that their differences were about 4.97×10-10 W?cm-2?sr-1 one order of magnitude blow the minimum detection threshold of VIIRS DNB (3×10-9 W?cm-2?sr-1) during 2018-2020. So there is good performance of on-orbit radiometric calibration of VIIRS DNB on SNPP and NOAA-20 based on the error range of acceptable instrument sensitivity. Besides, an evaluation of on-orbit radiometric calibration stability of VIIRS DNB was conducted based on the distance-corrected radiance of SNPP VIIRS DNB and NOAA-20 VIIRS DNB. And it was found that when under the same lunar phase angle, the VIIRS DNB radiance kept a good consistency within 6% between SNPP and NOAA-20.

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LI Jin-Jin, QIU Shi, ZHANG Yu, GAO Cai-Xia, QIAN Yong-Gang, LIU Yao-Kai. Performance assessments of VIIRS DNB on-orbit radiometric calibration accuracy and stability on SNPP and NOAA-20[J]. Journal of Infrared and Millimeter Waves,2021,40(6):809~819

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  • Received:February 07,2021
  • Revised:December 09,2021
  • Adopted:March 24,2021
  • Online: November 29,2021
  • Published: