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This paper discusses the application and adaptation of two existing operational algorithms for land surface emissivity () retrieval from different operational satellite/airborne sensors with bands in the visible and near-infrared (VNIR) and thermal IR (TIR) regions: 1) the temperature and emissivity separation algorithm, which retrieves only from TIR data and 2) the normalized-difference vegetation index thresholds method, in which is retrieved from VNIR data.
Sobrino et al. (Wed,) studied this question.