Abstract
The measurement of the reflectance of hard targets used to calibrate lidar have been complicated by the introduction of polarization effects by Kavaya.1 As a result, some investigators no longer employ hard targets. Haner and Menzies2 presented an excellent paper on the comparison method to calibrate hard targets and the flooded sulfur target appeared to be a good secondary standard for the scattered radiation was nearly depolarized and exhibited reduced retroreflection.
© 1991 Optical Society of America
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