The 3.7-μm channel on-board the National Oceanic and Atmospheric Administration's (NOAA) Advanced Very High Resolution Radiometer (AVHRR) provides the unique capability to detect small, but hot, surface features. We present an image-processing technique based on a pixel-by-pixel subtraction of 10.8 μm from 3.7 μm brightness temperatures. We also develop an automated technique which classifies hotspots based on: 1) the brightness temperatures at 3.7 and 10.8 μm at a given pixel, and 2) a background temperature based on the immediately surrounding pixels.
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Research Article| 1 December 1990
Improved Detection of Hotspots using the AVHRR 3.7-um Channel
Thomas F. Lee;
Bull. Amer. Meteor. Soc. (1990) 71 (12): 1722–1730.
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Lee, T. F., and P. M. Tag, 1990: Improved Detection of Hotspots using the AVHRR 3.7-um Channel. Bull. Amer. Meteor. Soc., 71, 1722–1730, https://doi.org/10.1175/1520-0477(1990)071<1722:IDOHUT>2.0.CO;2.
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