{"id":43394,"date":"2021-11-19T13:19:52","date_gmt":"2021-11-19T13:19:52","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=43394"},"modified":"2021-11-19T13:27:20","modified_gmt":"2021-11-19T13:27:20","slug":"total-lunar-eclipse-in-the-day-night-band","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/43394","title":{"rendered":"Total Lunar Eclipse in the Day Night Band"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/NOAA20.21323.USA_Composite.DNBD_.4000m.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"591\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/NOAA20.21323.USA_Composite.DNBD_.4000m-1024x591.jpg\" alt=\"\" class=\"wp-image-43395\" srcset=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/NOAA20.21323.USA_Composite.DNBD_.4000m-1024x591.jpg 1024w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/NOAA20.21323.USA_Composite.DNBD_.4000m-300x173.jpg 300w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/NOAA20.21323.USA_Composite.DNBD_.4000m-768x443.jpg 768w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/NOAA20.21323.USA_Composite.DNBD_.4000m.jpg 1300w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption>NOAA-20 Day Night Band, 19 November 2021 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p><a href=\"https:\/\/ge.ssec.wisc.edu\/viirs-today\/index.php?satellite=n2&amp;product=DNB&amp;date=2021_11_19_323&amp;overlay_sector=false&amp;overlay_state=true&amp;overlay_coastline=true\">NOAA-20 Day Night Band imagery<\/a> from early morning (from the <a href=\"https:\/\/ge.ssec.wisc.edu\/viirs-today\/index.php\">VIIRS Today<\/a> website at CIMSS) on 19 November 2021 shows the impact of the <a href=\"https:\/\/earthsky.org\/astronomy-essentials\/partial-lunar-eclipse-longest-1000-years\/\">total lunar eclipse<\/a> on Day Night Band imagery.  A lunar eclipse will always occur during a Full Moon;  ample lunar illumination off the east coast accompanied that descending NOAA-20 pass between about 0635 and 0640 UTC (as shown in <a href=\"https:\/\/www.ssec.wisc.edu\/datacenter\/polar_orbit_tracks\/data\/JPSS-1\/2021\/2021_11_19_323\/NA.gif\">this orbital path image<\/a> from <a href=\"https:\/\/www.ssec.wisc.edu\/datacenter\/polar_orbit_tracks\/#satellite:NOAA20;region:North%20America;\">this website<\/a>) &#8212; just as the lunar eclipse was starting.  By the time NOAA-20 overflew the central US (0815 to 0825 UTC), near totality was occurring.  The overflight on the west coast (0955 to 1005 UTC) occurred as the eclipse was starting to wane, so a bit more lunar illumination was available.<\/p>\n\n\n\n<p>A similar Day Night Band image from <a href=\"https:\/\/www.ssec.wisc.edu\/datacenter\/polar_orbit_tracks\/data\/NPP\/2021\/2021_11_19_323\/NA.gif\">Suomi-NPP<\/a> (also from the <a href=\"https:\/\/ge.ssec.wisc.edu\/viirs-today\/index.php?satellite=n1&amp;product=DNB&amp;date=2021_11_19_323&amp;overlay_sector=false&amp;overlay_state=true&amp;overlay_coastline=true\">VIIRS Today website<\/a>) is below, and it shows similar differences in swath illumination.  The west coast overpass by Suomi-NPP occurred around 1050 UTC;  by then the eclipse had ended.   Suomi NPP Day Night Band imagery is also available at the <a href=\"https:\/\/worldview.earthdata.nasa.gov\/?v=-206.9092335213263,-64.22042300295094,53.03005596192821,90.97759990137506&amp;l=VIIRS_SNPP_DayNightBand_ENCC,Reference_Labels_15m(hidden),Reference_Features_15m(hidden),Coastlines_15m,VIIRS_NOAA20_CorrectedReflectance_TrueColor(hidden),VIIRS_SNPP_CorrectedReflectance_TrueColor(hidden),MODIS_Aqua_CorrectedReflectance_TrueColor(hidden),MODIS_Terra_CorrectedReflectance_TrueColor(hidden)&amp;lg=true&amp;t=2021-11-19-T12%3A45%3A00Z\">NASA Worldview site<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"591\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/SNPP.21323.USA_Composite.DNBD_.4000m-1024x591.jpg\" alt=\"\" class=\"wp-image-43397\" srcset=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/SNPP.21323.USA_Composite.DNBD_.4000m-1024x591.jpg 1024w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/SNPP.21323.USA_Composite.DNBD_.4000m-300x173.jpg 300w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/SNPP.21323.USA_Composite.DNBD_.4000m-768x443.jpg 768w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/11\/SNPP.21323.USA_Composite.DNBD_.4000m.jpg 1300w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Suomi-NPP Day Night Band imagery from early morning 19 November 2021 (Click to enlarge)<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>NOAA-20 Day Night Band imagery from early morning (from the VIIRS Today website at CIMSS) on 19 November 2021 shows the impact of the total lunar eclipse on Day Night Band imagery. A lunar eclipse will always occur during a Full Moon; ample lunar illumination off the east coast accompanied that descending NOAA-20 pass between [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":43395,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[78,49,48],"tags":[],"class_list":["post-43394","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noaa-20","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/43394","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=43394"}],"version-history":[{"count":4,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/43394\/revisions"}],"predecessor-version":[{"id":43401,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/43394\/revisions\/43401"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/43395"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=43394"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=43394"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=43394"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}