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Land surface hot-spot observed by MODIS over Central Africa
2002
International Journal of Remote Sensing
The hot-spot is the term used to describe the increased directional re ectance that occurs over most land surfaces when the solar and view directions coincide. Under these viewing conditions, shadows cast on the surface are minimized, resulting in increased re ectance. This phenomenon has been observed in laboratory measurements (Sandmeier et al. 1998 ), airborne data (Vermote et al. 1997) and multi-angular satellite sensor data by systems such as POLDER (Hautecoeur and Leroy 1998). Figure 1
doi:10.1080/01431160110120379
fatcat:bklsgqfvkngrhjkbbxcaxzh37y