Radiometric Calibration of Low-altitude UAV Multispectral Sensor
Radiometric calibration is essential for quantitative remote-sensing applications using UAV multi-spectral sensor.Taking the multispectral sensor onboard DJ P4 RTK UAV as investigated target,integrating vari-ous typical ground objects and artificial targets,this study implements radiometric calibration in full dynamic range of this sensor.After validating the calibration results,this study discusses the influences of exposure time and relative spectral responses on the calibration results.The results show the RMSEs in all bands are less than 3.25%.The pulse relative spectral response is more suitable for this sensor.Meanwhile,the different exposure time can cause the supersaturation for the middle-high brightness surface.
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