Acta Photonica Sinica, Volume. 48, Issue 4, 428001(2019)
High-frequency On-orbit Radiometric Calibration of SNPP VIIRS Based on In-site Automated Observation Technology
The automatic calibration system laid in Dunhuang radiometric calibration site was adopted to carry out the high-frequency automatic absolute radiometric calibration experiment from the visible to short-wave infrared of SNPP VIIRS remote sensor in allusion to the high-frequency, high-aging and high-precision calibration of remote sensing satellites. The principle automatic calibration was described in detail. In order to solve the mismatching problem between the channel reflectance and the reference reflectance spectral shape, a reference reflectance database was established for the change of the spectral shape of the surface spectral reflectance in a long-time span. A total of 13 effective automated calibrations of SNPP VIIRS were completed and compared with the apparent reflectance observed on SNPP VIIRS satellite from May to November, 2018. The results show that the relative deviation of the apparent reflectance obtained from the site automatic calibration and satellite is less than 5%, and the root mean square is less than 3.2%. This phenomenon indicates that the automatic calibration results of the site and the satellite have a high consistency and stability, which could be used for the high-frequency on-orbit radiometric calibration.
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ZHANG Meng, WEI Wei, ZHANG Yan-na, ZHAO Chun-yan, LI Xin, ZHENG Xiao-bing. High-frequency On-orbit Radiometric Calibration of SNPP VIIRS Based on In-site Automated Observation Technology[J]. Acta Photonica Sinica, 2019, 48(4): 428001
Received: Nov. 26, 2018
Accepted: --
Published Online: Apr. 28, 2019
The Author Email: Meng ZHANG (mengzzzz@mail.ustc.edu.cn)