{"id":65190,"date":"2025-06-06T19:13:36","date_gmt":"2025-06-06T19:13:36","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=65190"},"modified":"2025-06-06T19:13:36","modified_gmt":"2025-06-06T19:13:36","slug":"farewell-noaa-18","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/65190","title":{"rendered":"Farewell, NOAA-18"},"content":{"rendered":"\n

Today at 17:40 UTC, NOAA decommissioned one of its three remaining legacy polar-orbiting weather satellites, NOAA-18. The spacecraft was launched on May 20th, 2005, and was declared operational on August 30th, 2005. For nearly 20 years, NOAA-18 collected weather information across the whole globe, with every point on Earth in view, at minimum, every 12 hours.<\/p>\n\n\n\n

The final NOAA-18 orbit collecting data over the continental United States occurred around 16:08 UTC today. At this point, the AVHRR visible\/IR imaging sensor was no longer collecting infrared bands 4 and 5. The HRPT direct broadcast signal during this overpass was collected by SSEC’s X\/L-band tracking antenna in Madison, and processed using EUMETSAT’s AAPP and CSPP<\/a> Polar2Grid software:<\/p>\n\n\n\n

\"\"<\/td>\"\"<\/td>\"\"<\/td><\/tr>
Band 1: “Red Visible” [0.63 \u00b5m]<\/td>Band 2: “Vegetation Near-IR” [0.86 \u00b5m]<\/td>Band 3A: “Snow\/Ice Near-IR” [1.61 \u00b5m]<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Of NOAA’s 5th generation POES spacecraft, 2 remain active: NOAA-15 and NOAA-19. Both are expected to be decommissioned later this summer. Prior to today, the last NOAA polar weather satellite to be decommissioned was NOAA-16 on June 9th, 2014. The JPSS constellation (S-NPP, NOAA-20, and NOAA-21) remains active as NOAA’s primary polar-orbiting weather satellites.<\/p>\n","protected":false},"excerpt":{"rendered":"

Today at 17:40 UTC, NOAA decommissioned one of its three remaining legacy polar-orbiting weather satellites, NOAA-18. The spacecraft was launched on May 20th, 2005, and was declared operational on August 30th, 2005. For nearly 20 years, NOAA-18 collected weather information across the whole globe, with every point on Earth in view, at minimum, every 12 […]<\/p>\n","protected":false},"author":48,"featured_media":65191,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,26],"tags":[],"class_list":["post-65190","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-interpretation","category-poes"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/65190","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\/48"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=65190"}],"version-history":[{"count":9,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/65190\/revisions"}],"predecessor-version":[{"id":65205,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/65190\/revisions\/65205"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/65191"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=65190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=65190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=65190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}