{"id":41405,"date":"2021-07-06T19:47:25","date_gmt":"2021-07-06T19:47:25","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=41405"},"modified":"2021-07-07T00:20:43","modified_gmt":"2021-07-07T00:20:43","slug":"using-polar-orbiting-satellite-imagery-from-direct-broadcast-sites-to-understand-elsa","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/41405","title":{"rendered":"Using Polar-Orbiting Satellite Imagery from Direct Broadcast sites to understand Elsa"},"content":{"rendered":"
\"\"<\/a>

Suomi NPP Adapative Day Night Band imagery, 0636 UTC on 6 July 2021 (Click to enlarge)<\/p><\/div>\n

AOML<\/a> (The Atlantic Oceanographic and Meteorological Laboratory) maintains a Direct Broadcast antenna<\/a> site that holds satellite imagery (created using CSPP<\/a> — the Community Satellite Processing Package) created when a tropical system — such as Elsa<\/a> — is within the download footprint of the AOML antenna.\u00a0 This imagery — particularly in the microwave — is useful to describe the system’s structure. The Day Night Band image above, from Suomi NPP at 0636 UTC, shows a non-symmetric storm with the bulk of clouds to the east and south of the surface center (at that time near 23.9 N, 82.3 W<\/a>, i.e., in the Florida Straits to the south of Dry Tortuga).\u00a0 Rainfall, as diagnosed using MIRS algorithms<\/a> and microwave ATMS<\/a> (Advanced Technology Microwave Sounder) data from NPP, below, shows the asymmetry of the storm as well:\u00a0 almost all the diagnosed rain is east of the center. (It’s helpful that both infrared imagers and microwave sounders are on the same satellite!)<\/p>\n

\"\"<\/a>

Suomi NPP ATMS-derived Rain Rate, 0637 UTC on 6 July 2021 (Click to enlarge)<\/p><\/div>\n

The GCOM-W1 (supported by JAXA<\/a>) satellite also scanned Elsa shortly before 0700 UTC on 6 July.\u00a0 Microwave observations at ~36 GHz, below, and at 89 GHz, farther below, can help to characterize the structure of the storm. Indeed, observations at\/around 85-89 GHz are used in the MIMIC TC<\/a> product as described here<\/a>.<\/p>\n

\"\"<\/a>

GCOM AMSR-2 observations at 36.5 GHz, 0649 UTC on 6 July 2021 (Click to enlarge)<\/p><\/div>\n

\"\"<\/a>

GCOM AMSR-2 observations at 89.0 GHz, 0649 UTC on 6 July 2021 (Click to enlarge)<\/p><\/div>\n

In addition to the AOML site, the CIMSS Direct Broadcast site<\/a> contains Polar Orbiting imagery in near-real time. The afternoon 88.2 GHz image from (NOAA-20) ATMS is shown below.\u00a0 Cold cloud tops associated with strong scattering by ice of the 88.2 GHz signal are apparent.<\/p>\n

\"\"<\/a>

NOAA-20 ATMS Channel 16 Brightness Temperature, 1845 UTC on 6 July 2021 (Click to enlarge)<\/p><\/div>\n

\n

There are a multitude of polar orbiters such that observations show up in clusters of time.\u00a0 However, for a better time animation, it’s still best to rely on GOES-16!\u00a0 The animation below, from CSPP Geosphere<\/a>, shows a sheared storm south and west of Ft Myers FL.\u00a0 Indeed, an 1800 UTC 6 July 2021 shear analysis from the CIMSS Tropical website (here<\/a>, from this site<\/a>), shows westerly shear of 25-30 knots.<\/p>\n

https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/07\/Elsa_CSPP-GeoSphere2021-07-06-14-36-32.mp4<\/a><\/video><\/div>\n

GOES-16 True-Color imagery, 6 July 2021 from 1730 to 1920 UTC (Click to animate)<\/p>\n

For the latest information on Elsa, consult the webpages of the National Hurricane Center<\/a>, or the SSEC\/CIMSS Tropical Weather Page<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

AOML (The Atlantic Oceanographic and Meteorological Laboratory) maintains a Direct Broadcast antenna site that holds satellite imagery (created using CSPP — the Community Satellite Processing Package) created when a tropical system — such as Elsa — is within the download footprint of the AOML antenna.\u00a0 This imagery — particularly in the microwave — is useful […]<\/p>\n","protected":false},"author":19,"featured_media":41416,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[89,81,74,78,49,2],"tags":[],"class_list":["post-41405","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-atms","category-gcom-w1","category-goes-16","category-noaa-20","category-suomi_npp","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/41405","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=41405"}],"version-history":[{"count":8,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/41405\/revisions"}],"predecessor-version":[{"id":41423,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/41405\/revisions\/41423"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/41416"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=41405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=41405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=41405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}