{"id":9661,"date":"2012-01-26T22:27:02","date_gmt":"2012-01-26T22:27:02","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=9661"},"modified":"2012-01-26T22:46:48","modified_gmt":"2012-01-26T22:46:48","slug":"detection-of-thin-fogstratus-features-modis-vs-viirs","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/9661","title":{"rendered":"Detection of thin fog\/stratus features: MODIS vs VIIRS"},"content":{"rendered":"
\"Aqua<\/a>

Aqua MODIS: 11.0 \u00c2\u00b5m IR images (grayscale, and color-enhanced) + "Fog\/stratus product"<\/p><\/div>\n

A comparison of AWIPS images of 1-km resolution Aqua<\/strong><\/a> MODIS<\/strong><\/a> 11.0 \u00c2\u00b5m “IR Window” channel data (both grayscale, and color-enhanced)<\/em> and the corresponding MODIS “Fog\/stratus product” (above)<\/strong><\/em> showed some areas of fog and\/or stratus cloud over the eastern half of Hudson Bay, Canada on 26 January 2012<\/strong>. On the fog\/stratus product, low clouds and\/or fog appear as the yellow-to-red enhanced features, while cirrus cloud features appear darker black.<\/p>\n

The primary feature of interest here is the very thin – almost “translucent” – patch of fog\/stratus located in the upper center portion of the image, to the west of Akulivik (station identifier CYKO)<\/em> and Povungnituq (station identifier CYPX)<\/em>. The exact edges of this feature were difficult to identify in either the grayscale or the color-enhanced IR images — but the conventional “Fog\/stratus product” (simply the difference in IR brightness temperature between the 11.0 \u00c2\u00b5m and 3.7 \u00c2\u00b5m channel data)<\/em> allowed unambiguous identification of the edges.<\/p>\n

About 45 minutes earlier, a similar comparison using McIDAS images of of 375-meter resolution Suomi NPP<\/strong><\/a> VIIRS<\/strong><\/a> 11.450 \u00c2\u00b5m IR data (both grayscale, and color-enhanced)<\/em> and the corresponding VIIRS “Fog\/stratus product” (below)<\/strong><\/em> showed much more detail associated with this particular thin fog\/stratus feature. The higher spatial resolution allowed many more of the\u00c2\u00a0 ice leads to be seen — even some of the larger ones that were located below the thin fog\/stratus feature.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS: 11.450 \u00c2\u00b5m IR (grayscale, and color-enhanced) + "Fog\/stratus product"<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

A comparison of AWIPS images of 1-km resolution Aqua MODIS 11.0 \u00c2\u00b5m “IR Window” channel data (both grayscale, and color-enhanced) and the corresponding MODIS “Fog\/stratus product” (above) showed some areas of fog and\/or stratus cloud over the eastern half of Hudson Bay, Canada on 26 January 2012. On the fog\/stratus product, low clouds and\/or fog […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37,13,12,49,48],"tags":[],"class_list":["post-9661","post","type-post","status-publish","format-standard","hentry","category-arctic","category-fog-detection","category-modis","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/9661","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\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=9661"}],"version-history":[{"count":6,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/9661\/revisions"}],"predecessor-version":[{"id":9667,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/9661\/revisions\/9667"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=9661"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=9661"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=9661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}