dorsal/arxiv
View SchemaThe Effect of the 12-micrometer Band: Comparing GOES-11 and GOES-12 Data Using the 3-Channel Volcanic Ash Algorithm
| Authors | Emily M. Matson |
|---|---|
| Categories | |
| ArXiv ID | physics/0608254 |
| URL | https://arxiv.org/abs/physics/0608254 |
Abstract
The 12-micrometer channel on GOES-11 has been replaced by the 13.3-micrometer channel on the latest geosynchronous satellite, GOES-12.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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"abstract": "The 12-micrometer channel on GOES-11 has been replaced by the 13.3-micrometer\nchannel on the latest geosynchronous satellite, GOES-12. There has been concern\nthat this 13.3-micrometer channel will not be as accurate in detecting volcanic\nash. Volcanic ash is highlighted using a special volcanic ash algorithm, an\narithmetic combination of the brightness temperatures as measured by three\nchannels, yielding a unitless brightness count whose values comprise an IR\nimage. Degradation in cloud detection, especially low clouds, was also\nexpected. IR data from GOES-11 and GOES-12 for two Mexican volcanoes, Colima\nand Popocatepetl, was analyzed. The data indicates that, in general, the\nGOES-11 volcanic ash algorithm with the 12-micrometer band provides much better\ndata for various types of clouds. It emphasizes the importance of the\n12-micrometer band and provides scope for future research in this area.",
"arxiv_id": "physics/0608254",
"authors": [
"Emily M. Matson"
],
"categories": [
"physics.ao-ph"
],
"title": "The Effect of the 12-micrometer Band: Comparing GOES-11 and GOES-12 Data Using the 3-Channel Volcanic Ash Algorithm",
"url": "https://arxiv.org/abs/physics/0608254"
},
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