Absolute radiometric calibration and validation of a UAV multispectral sensor: a comparison between the irradiance-based method and reflectance-based method. Issue 3 (2nd September 2021)

• Record Type: Journal Article
• Authors: Chen, Wei; Wang, Hengyang
• Is Part Of: Journal of spatial science. Volume 66:Issue 3(2021)
• Page Start: 481
• Page End: 492
• Publication Date: 2021-09-02
• Subjects: Absolute calibration -- reflectance-based method -- irradiance-based method -- man-made targets; Geographic information systems -- Periodicals; Cartography -- Periodicals; Surveying -- Periodicals; Geodesy -- Periodicals; Photogrammetry -- Periodicals; Cartography; Geodesy; Geographic information systems; Photogrammetry; Surveying; Periodicals; 526.05
• DOI: 10.1080/14498596.2019.1658651
• Languages: English
• ISSNs: 1449-8596

Abstract

ABSTRACT: Through an unmanned vehicle payload calibration campaign experiments, both reflectance-based and irradiance-based methods are used to calibrate multispectral sensor. The results show that both methods achieved good linear relationships between the digital numbers and apparent radiances (R 2 > 0.99). Validation results demonstrated the relative error between the radiometric calibration and radiative transfer calculation ranged from 0.91% to 21.05%. The error analysis suggested that the irradiance-based method is less sensitive to aerosol parameters. However, the relative differences between these two methods are small under low aerosol loading conditions, suggesting the irradiance-based method may be a good option with some improvements.