[In-flight absolute radiometric calibration of UAV multispectral sensor]

Area of Science:

• Remote Sensing
• Optical Calibration
• Geophysics

Context:

• UAV remote sensing requires accurate calibration.
• Field projects necessitate reliable calibration methods.
• Hyperspectral radiometric targets are crucial for calibration accuracy.

Purpose:

• To calibrate a wide-view multispectral camera on a UAV.
• To validate the suitability of hyperspectral targets for in-flight calibration.
• To assess the accuracy and reliability of the calibration method.

Summary:

• A reflectance-based method was used to calibrate a UAV's multispectral camera using hyperspectral radiometric targets.
• High linear correlation coefficients (>99%) were achieved for green, red, and infrared channels.
• The comprehensive error was found to be less than 6%.

Impact:

• The hyperspectral targets are suitable for airborne multispectral load in-flight calibration.
• The reliable calibration results can be used for geophysical parameter retrieval.
• This research contributes to accurate UAV-based Earth observation.