Laboratory panel and radiometer calibration

This paper presents the results of the laboratory and field based reflectance panel and radiometer comparisons that took place as part of the CEOS 2010 Key comparison of "techniques and instruments used for the vicarious calibration of Land surface imaging through a ground reference standard test site". The results of the comparisons are presented which shows that the different ways in which reflectance panels are calibrated can give different results for the reflectance attributed to a test site and that changing illumination and environmental conditions can effect the measured target reflectance.