Physics – Atmospheric and Oceanic Physics
Scientific paper
2006-08-25
Physics
Atmospheric and Oceanic Physics
Paper satisfies senior tech lab requirement (summer mentorship) for Thomas Jefferson High School for Science and Technology (T
Scientific paper
The 12-micrometer channel on GOES-11 has been replaced by the 13.3-micrometer channel on the latest geosynchronous satellite, GOES-12. There has been concern that this 13.3-micrometer channel will not be as accurate in detecting volcanic ash. Volcanic ash is highlighted using a special volcanic ash algorithm, an arithmetic combination of the brightness temperatures as measured by three channels, yielding a unitless brightness count whose values comprise an IR image. Degradation in cloud detection, especially low clouds, was also expected. IR data from GOES-11 and GOES-12 for two Mexican volcanoes, Colima and Popocatepetl, was analyzed. The data indicates that, in general, the GOES-11 volcanic ash algorithm with the 12-micrometer band provides much better data for various types of clouds. It emphasizes the importance of the 12-micrometer band and provides scope for future research in this area.
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