Abstract
The Operational Land Imager 2 (OLI-2) has undergone absolute spectral radiance calibration at Ball Aerospace. A 40” integrating sphere source (DSS) is used as the NIST-traceable artifact in the OLI-2 ground calibration. The required 2.5% accuracy (k=1) of the DSS has been verified through a rigorous cross-verification study in collaboration with NASA GSFC and the University of Arizona. The radiometric cross-verification featured two “Round Robin” events where each institution measured the same set of radiometric sources with independent radiometers. The agreement between radiance transfer measurements is within expected uncertainties and demonstrates the continued success of Ball’s improved source calibration practices.
Radiometric Source Traceability for the Ground Calibration of OLI 2
The Operational Land Imager 2 (OLI-2) has undergone absolute spectral radiance calibration at Ball Aerospace. A 40” integrating sphere source (DSS) is used as the NIST-traceable artifact in the OLI-2 ground calibration. The required 2.5% accuracy (k=1) of the DSS has been verified through a rigorous cross-verification study in collaboration with NASA GSFC and the University of Arizona. The radiometric cross-verification featured two “Round Robin” events where each institution measured the same set of radiometric sources with independent radiometers. The agreement between radiance transfer measurements is within expected uncertainties and demonstrates the continued success of Ball’s improved source calibration practices.