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Remote Sensing Technology and Application  2018, Vol. 33 Issue (2): 337-341    DOI: 10.11873/j.issn.1004-0323.2018.2.0337
    
Methods of On-orbit Calibration of Satellite Radiometer Reflective Solar Bands Using the Moon
Niu Minghui1,2,Chen Fuchun1
(1.Chinese Academy Sciences Key Laboratory of Infrared System Detection and Imaging Technology,
Shanghai Institute of Technical Physics,Shanghai 200083,China;
2.University of Chinese Academy of Sciences,Beijing 100049,China)
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Abstract  The quantitative applications of satellite remote sensing,especially the application of detecting trends in environmental parameters,place stringent requirements on the stability of instruments and consistency among different platforms.The stability of lunar photometry in solar reflective bands makes it ideal calibration reference for on\|orbit calibration of satellite radiometers.The principle of lunar calibration is straightforward.Irradiance or radiance of the moon received by the instrument will not change if the relative geometry of the Sun,the Moon and the instrument remains unchanged.So the series of the Moon measurements can monitor the change of the instrument’s responsivity.The same relative geometry is unattainable due to the orbits of the Earth and the Sun and the operation of the satellite.The series of the Moon measurements should be corrected and normalized to the same geometry in order to determine the trend of the instrument’s responsivity.The main procedures of data processing are discussed,including lunar disk\|integrated irradiance calculation or mean radiance calculation,over\|sampling correction,distance correction,lunar phase correction and lunar liberation effect correction.The latter three items are also called geometric effects correction.Key methods of lunar phase correction and lunar liberation effect correction are analyzed,including method of multiple regression and data fitting for raw data and method based on lunar photometric models.The method of quantifying the trend of responsivity for satellite radiometer and the form of correction for calibration coefficients are proposed.

Key words:  Lunar calibration      Geometric correction      Lunar radiometric mode     
Received:  09 May 2017      Published:  15 May 2018
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Niu Minghui
Chen Fuchun

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Niu Minghui,Chen Fuchun. Methods of On-orbit Calibration of Satellite Radiometer Reflective Solar Bands Using the Moon. Remote Sensing Technology and Application, 2018, 33(2): 337-341.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2018.2.0337     OR     http://www.rsta.ac.cn/EN/Y2018/V33/I2/337

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