The limitations and potential of AVHRR GAC data for continental scale fire studies
作者： A. S. BELWARD , P. J. KENNEDY , J. M. GRÉGOIRE
DOI: 10.1080/01431169408954239
关键词: Scale (map) 、 Environmental science 、 Data source 、 Sampling (statistics) 、 Area coverage 、 Advanced very-high-resolution radiometer 、 Remote sensing 、 Radiometer 、 Fire detection 、 Radiometry
摘要: Abstract Global Area Coverage (GAC) data from the Advanced Very High Resolution Radiometer (AVHRR) are available on a daily basis, dating back to July 1981. The AVHRR's 3·55–3·93 μm channel is suitable for detection of terrestrial hot spots, such as bushfires. long-term archives and global cover make GAC potentially valuable source large scale fire studies. However, these sampled spatially through combination line skipping averaging. This study shows that sampling affects sensitivity in relation ecosystem season. found provide reasonable measure activity grassland open b'ush savannah, but perform poorly forest margins. Overall at least 79 per cent fires detected with non-sampled AVHRR missed by GAC. severely limits use quantitative does appear calendar (i.e., variations activity...
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