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  • Saturation of the data signal in channel 3 of AVHRR : Major handicap or source of information for environmental monitoring in the Sahel zone of West Africa?

Abstract

Saturation of data from channel 3 of the Advanced Very High Resolution Radiometer (AVHRR) is used as an indicator of fire activity in the Sahel zone of West Africa. Surface phenomena other than fire are also found to cause channel 3 saturation. The variation in space and time of saturation is potentially a valuable source of information for environmental monitoring in West Africa. Results suggest that monitoring the spatial-temporal dynamics of channel 3 saturation: (i) can help, when used alongside the Normalised Difference Vegetation Index (NDVI), in the definition of new cover classes, particularly at continental and global scales; (ii) could play an important role in modelling energy and water exchanges at the biosphere-atmosphere interface; (iii) forms a framework for the analysis of fire activity; (iv) could act as a good indicator of rapid ecosystem change.

Additional information

Authors: GRÉGOIRE J M, JRC Ispra (IT);BELWARD A S, JRC Ispra (IT);KENNEDY P, JRC Ispra (IT)
Bibliographic Reference: Article: International Journal of Remote Sensing, Vol. 14 (1993) No. 11, pp. 2061-2078
Record Number: 199311509 / Last updated on: 1994-11-28
Category: PUBLICATION
Original language: fr
Available languages: fr