The Ground-Based Absolute Radiometric Calibration of the Landsat 9 Operational Land Imager
Remote Sensing(2024)
Abstract
This paper presents the initial vicarious radiometric calibration results for Landsat 9 OLI using a combination of ground-based techniques and test sites located in Nevada, California, and South Dakota, USA. The field data collection methods include the traditional reflectance-based approach and the automated Radiometric Calibration Test Site (RadCaTS). The results for top-of-atmosphere spectral radiance show an average ratio (OLI/ground measurements) of 1.03, 1.01, 1.00, 1.02, 1.02, 1.01, 0.98, and 1.01 for Landsat 9 OLI bands 1-8, which is within the design specification of +/- 5% for spectral radiance. The results for top-of-atmosphere reflectance show an average ratio (OLI/ground measurements) of 0.99, 0.99, 1.00, 1.02, 1.01, 1.02, 1.00, and 1.00 for Landsat 9 OLI bands 1-8, which is within the design specification of +/- 3% for top-of-atmosphere reflectance.
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Key words
Landsat 9,OLI,radiometric calibration,absolute calibration,radiometric validation
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