Practical methodologies for the reflectance calibration of casi data (Activities of the NERC Equipment Pool for Field Spectroscopy (EPFS) in support of the NERC Airborne Remote Sensing Facility), NERC ARSF Meeting, BGS Keyworth, 12-13 December 2000. Southampton, UK, University of Southampton, Department of Geography, NERC EPFS, 14pp.
Casi data are routinely provided in units that are directly related to spectral radiance, but for many purposes it is necessary to convert these data to reflectance. There are several methods to achieve this, which vary in their complexity, accuracy, and requirements for resources. This paper reviews two practical methodologies for the conversion of casi radiance data to reflectance. The first is based on the use of the Incident Light Sensor (ILS) fitted to the roof of the aircraft. The second uses ground calibration targets of known, stable reflectance.
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