{"id":58552,"date":"2024-04-18T18:45:33","date_gmt":"2024-04-18T18:45:33","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=58552"},"modified":"2024-05-29T21:15:18","modified_gmt":"2024-05-29T21:15:18","slug":"goes-abi-time-composites-from-april-8th","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/58552","title":{"rendered":"GOES ABI Time Composites from April 8th, 2024 Eclipse"},"content":{"rendered":"\n

There are many GOES loops showing the moon’s shadow from the total solar eclipse on April 8, 2024 (UW\/CIMSS<\/a>; CIRA<\/a>; Satellite Liaison<\/a>; NOAA<\/a>). Time compositing, in this case selecting the minimum brightness, shows the shadow from several times in a single frame.<\/p>\n\n\n\n

2017 and 2024 Comparisons<\/h2>\n\n\n\n

The size of the Moon’s shadow on the Earth during the total solar eclipses were very different between 2017<\/a> and 2024<\/a>. We use ABI band 3 (0.86 um)<\/a>, since the land background tends to be bright (due to reflection off vegetation), hence giving more contrast with the dark shadow. <\/p>\n\n\n\n

Time composited (minimum value) ABI band 3 imagery (every 10 min) from 2017, 2024 and both. <\/figcaption><\/figure>\n\n\n\n

A similar (mp4) loop as above, but with the years annotated on the images<\/a>. <\/p>\n\n\n\n

\"\"\/
Time composited (minimum value) ABI band 3 imagery (every 10 min) from 2017 and 2024. <\/figcaption><\/figure>\n\n\n\n\t\n\t\t\n\t\t\t<\/polyline>\n\t\t\t<\/polyline>\n\t\t\t<\/polyline>\n\t\t\t<\/polyline>\n\t\t\t<\/svg>\n\t\t<\/span>\n\t<\/span>\n<\/div>\n\n\n\n\n\n

Similar to above, but with 5 min ABI imagery….<\/p>\n\n\n\n

\"\"\/
Time composited (minimum value) ABI band 3 imagery (every 5 min) from 2017 and 2024. <\/figcaption><\/figure>\n\n\n\n
A (10-min) time animation of the minimum ABI (stretched) band 3 from April 8, 2024. <\/figcaption><\/figure>\n\n\n\n

A direct link<\/a> to the above animation. <\/p>\n\n\n\n

Full Disk<\/h2>\n\n\n\n
\"\"
A time composite of the minimum brightness of ABI band 3 (0.86 micrometer) every 10 min on the afternoon of April 8, 2024.<\/figcaption><\/figure>\n\n\n\n

The above image is a composite of 21 images, from 16:30 to 19:50 UTC (image start times). The composite consists of selecting the darkest pixel. Note that a special enhancement was applied to each image before the compositing. The dark regions from the Moon’s shadow are clearly evident. Note that less clouds are apparent in the composite, since the minimum values were chosen over time. <\/p>\n\n\n\n

A larger version (11,000 x 11,000) of the above FD image<\/a>, without labels. <\/p>\n\n\n\n

Another Full Disk composite<\/a>, but hourly, and of the CIMSS Natural color composite image.<\/p>\n\n\n\n

CONUS + Meso-scale<\/h2>\n\n\n\n
\"\"\/
A time composite of the minimum brightness of ABI band 3 (0.86 micrometer) every 1-5 min on the afternoon of April 8, 2024. The predicted path is also plotted (in yellow).<\/figcaption><\/figure>\n\n\n\n

A research request<\/a> was submitted to satellite operators to have an ABI meso-scale sector “follow” the shadow, from Mexico to Canada. This special schedule<\/a> was scanned. The time compositing procedure was applied to the 1-min meso-scale sectors, as well the 5-min CONUS sectors. This consisted of over 100 images, between 17:51 and 19:59 UTC. The dark regions from the Moon’s shadow is evident. A toggle<\/a> (animated gif) between the composited image and the predicted path.<\/p>\n\n\n\n

Full Disk + CONUS + Meso-scale — Following the shadow<\/h2>\n\n\n\n
GOES-16 ABI Band 3 enhanced to highlight the eclipse shadow. These are 1-minute Mesoscale sectors over the 5-minute CONUS (and 10-minute Full Disk) sectors, tracking the shadow every minute as it moves across North America. (Animation from M. Gunshor, UW\/CIMSS).<\/figcaption><\/figure>\n\n\n\n

A direct link to the above mp4 animation<\/a>. This is an update to an earlier version that only included meso and CONUS sectors. <\/p>\n\n\n\n

GOES-18 and -16 ABI<\/h2>\n\n\n\n
GOES-18 and -16 ABI Time Composited stretched Band 3. Both images have been remapped to a Mollweide projection. <\/figcaption><\/figure>\n\n\n\n

The above loop, as an animated gif<\/a>. Note how GOES-18 better depicts the Moon’s shadow during the earlier times. <\/p>\n\n\n\n

H\/T<\/h2>\n\n\n\n

Thanks to those investigating \/ scheduling the meso\u2019s on April 8th, including the NOAA NESDIS User Services team. Fun fact, the meso research request was initially submitted on May 3, 2023. Thanks to many from UW\/CIMSS\/SSEC helping with this blog post. Thanks also for the Eclipse Predictions<\/a> by Fred Espenak, NASA\u2019s GSFC. McIDAS-X<\/a> was used for image generation. Thanks to the satellite operators, SDM, PRO, SAB and the NWS as well as UW\/CIMSS (especially M. Gunshor and J. Nelson) and the SSEC Data Services<\/a>. More on the ABI and the GOES-R series<\/a>. T. Schmit<\/a> works for NOAA\/NESDIS\/STAR and is stationed in Madison, WI. <\/p>\n","protected":false},"excerpt":{"rendered":"

There are many GOES loops showing the moon’s shadow from the total solar eclipse on April 8, 2024 (UW\/CIMSS; CIRA; Satellite Liaison; NOAA). Time compositing, in this case selecting the minimum brightness, shows the shadow from several times in a single frame. 2017 and 2024 Comparisons The size of the Moon’s shadow on the Earth […]<\/p>\n","protected":false},"author":21,"featured_media":58639,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,74,99],"tags":[],"class_list":["post-58552","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-interpretation","category-goes-16","category-solar-eclipse-shadow"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/58552","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\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=58552"}],"version-history":[{"count":25,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/58552\/revisions"}],"predecessor-version":[{"id":59535,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/58552\/revisions\/59535"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/58639"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=58552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=58552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=58552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}