Long-term autonomous vicarious calibration of VIS-NIR channels of MODIS

Ganggang Qiu; Jinhui Liu; Wenfa Lv; Wei Wei; Meng Zhang

doi:10.1117/12.2564979

17 April 2020 Long-term autonomous vicarious calibration of VIS-NIR channels of MODIS

Ganggang Qiu, Jinhui Liu, Wenfa Lv, Wei Wei, Meng Zhang

Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 114554M (2020) https://doi.org/10.1117/12.2564979
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China

Abstract

In this Letter, we present the automated observation radiometric calibration (AORC) approach for vicarious calibration to determine the surface reflectance for any arbitrary test site in the absence of ground personnel. It has successfully operated at Dunhuang test site for 4 months, with a suite of instruments including an automated test-site radiometer, a precision solar radiometer, and a visible and short-wave infrared hyper-spectral irradiance meter. The predicted top-of- atmosphere (TOA) radiance are in good agreement with those obtained from the on-board calibration system of Terra Moderate Resolution Imaging Spectrometer (MODIS), the average percent difference less than 3.10% in nine bands except 5.14% in band 5. It enable us to improve the calibration frequency, currently once a year in situ, to 1~2 times every month and maintain radiometric accuracy on par with manned field campaigns which making it possible to establish long-term trends in sensor performance.

Citation Download Citation

Ganggang Qiu, Jinhui Liu, Wenfa Lv, Wei Wei, and Meng Zhang "Long-term autonomous vicarious calibration of VIS-NIR channels of MODIS", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 114554M (17 April 2020); https://doi.org/10.1117/12.2564979

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