{"id":54494,"date":"2023-09-18T14:34:29","date_gmt":"2023-09-18T14:34:29","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=54494"},"modified":"2023-09-18T18:07:48","modified_gmt":"2023-09-18T18:07:48","slug":"5-15-micrometer-data-on-geoxo-as-revealed-by-model-output","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/54494","title":{"rendered":"5.15 micrometer data on GeoXO as revealed by model output"},"content":{"rendered":"\n

The GXI<\/a> (GeoXO Imager) instrument to be flown on the GeoXO (Geostationary eXtended Observations) satellite, scheduled for launch in the mid-2030s, is intended to replace ABI data from the current set of GOES-R Satellites. One of the novel channels to be added to GXI senses infrared information at 5.15 \u00b5m, a wavelength at which absorption by water vapor occurs. As the weighting functions below show (source: this paper<\/a> by Milller et al.<\/em>), the wavelength is sensing information from far down in the atmosphere (in clear skies), much closer to the surface than the current water vapor infrared channels (bands 8-10, 6.19 \u00b5m, 6.95 \u00b5m and 7.34 \u00b5m) on the ABI (as shown here<\/a> for a mid-latitude Summer atmosphere).<\/p>\n\n\n\n

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Weighting Functions in various atmospheres (as noted) at 5.15 \u00b5m (Click to enlarge); the numbers at the top of the plots are Total Precipitable Water in the sounding<\/figcaption><\/figure>\n\n\n\n

The animation below show simulated 5.15 \u00b5m and 7.3 \u00b5m imagery for a case in 2019. These 5.15 \u00b5m and 7.34 \u00b5m imagery are simulated using the Pressure layer Fast Algorithm for Atmospheric Transmittances (PFAAST) model applied to a 1-km ECMWF nature run (XNR1K). The spatial resolution is 2 km and imagery is courtesy of Zhenglong Li. Pay especial attention to the gradients in the low-level field (5.15 \u00b5m) at around 1215 UTC<\/a> over the Gulf of Mexico and around 1545 UTC<\/a> over the lower Mississippi River — regions highlighted by boxes. Note how such features are absent in the 7.3 \u00b5m, the water vapor channel on the ABI that senses infrared information from lowest down in the atmosphere. Convection subsequently develops within those boxes along these gradients that are apparent at 5.15 \u00b5m before they are at 7.34 \u00b5m. A conclusion might be: data from GXI will likely allow a forecaster to determine earlier where convection might subsequently develop.<\/p>\n\n\n\n

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Animation of 5.15 \u00b5m (left) and 7.34 \u00b5m (right) infrared imagery, with similar color enhancements, from 0015 UTC on 6 September to 0600 UTC on 7 September 2019 with a time step of 15 minutes (Click to enlarge)<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

The GXI (GeoXO Imager) instrument to be flown on the GeoXO (Geostationary eXtended Observations) satellite, scheduled for launch in the mid-2030s, is intended to replace ABI data from the current set of GOES-R Satellites. One of the novel channels to be added to GXI senses infrared information at 5.15 \u00b5m, a wavelength at which absorption […]<\/p>\n","protected":false},"author":19,"featured_media":54499,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[124],"tags":[],"class_list":["post-54494","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geoxo"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/54494","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=54494"}],"version-history":[{"count":7,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/54494\/revisions"}],"predecessor-version":[{"id":54517,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/54494\/revisions\/54517"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/54499"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=54494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=54494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=54494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}