{"id":5116,"date":"2010-04-14T19:56:37","date_gmt":"2010-04-14T19:56:37","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=5116"},"modified":"2017-04-06T20:40:34","modified_gmt":"2017-04-06T20:40:34","slug":"goes-13-is-now-the-operational-goes-east-satellite","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/5116","title":{"rendered":"GOES-13 is now the operational GOES-East satellite"},"content":{"rendered":"
\"GOES-12<\/a>

GOES-12 0.65 \u00b5m vs GOES-13 0.63 \u00b5m visible images<\/p><\/div>\n

As of 18:34 UTC on 14 April 2010<\/strong><\/a>, GOES-13 (launched May 2006, with a Post Launch Test in December 2006<\/strong><\/a>)<\/em> replaced GOES-12 (launched July 2001)<\/em> as the operational GOES-East satellite\u00a0 — for more information, see the NOAA NESDIS Satellite Services Division<\/strong><\/a>. A sequence of AWIPS images (above)<\/strong><\/em> shows the last three GOES-12 visible images followed by the first three GOES-13 visible images centered over the Upper Midwest region of the US during the satellite transition period. Both the GOES-12 and the GOES-13 visible images are enhanced using the “Linear” AWIPS enhancement (see below for more details)<\/em>.<\/strong><\/p>\n

Note that areas of dense vegetation (for example, over river valleys, and also across much of southern Indiana)<\/em> appear slightly darker<\/strong> on the GOES-13 visible channel images. This is due to the fact that the visible channel on the newer GOES series — GOES-13 and beyond — is a narrower<\/strong> channel (centered at 0.63 \u00b5m, vs 0.65 \u00b5m for the older GOES satellites)<\/em> that misses the “brighter” portion of the grass\/vegetation spectrum (green plot)<\/em> that begins to increase rapidly at wavelengths higher than about 0.7 \u00b5m (below)<\/strong><\/em>. You will also notice that the cloud features appear slightly brighter<\/em> in the last three GOES-13 images — this is due to the fact that the GOES visible detector performance tends to degrade over time, so the visible images from the much\u00a0 older GOES-12 satellite appear slightly “washed out” in comparison.<\/p>\n

\"GOES-12<\/a>

GOES-12 vs GOES-13 visible channel spectral response function plots<\/p><\/div>\n

Note to AWIPS users:<\/strong> because of the different characteristics of the GOES-13 visible channel, it is suggested that you change the default GOES visible image enhancement from “ZA” to “Linear” — as seen in a GOES-13 visible image comparison with those 2 enhancements (below)<\/strong>, the GOES-13 imagery can appear too dark with the default “ZA” enhancement.<\/em><\/p>\n

\"GOES-13<\/a>

GOES-13 visible image: “ZA” enhancement vs “Linear” enhancement<\/p><\/div>\n

======================================<\/strong><\/p>\n

\"GOES-12<\/a>

GOES-12 vs GOES-13 Sounder 4.5 \u00b5m shortwave IR images<\/p><\/div>\n

There are also significant improvements in the quality of the GOES-13 Sounder<\/strong><\/a> data, due to the fact that GOES-12 had been experiencing filter wheel problems<\/strong><\/a> for quite some time. AWIPS comparisons of the last GOES-12 and the first GOES-13 Sounder 4.5 \u00b5m shortwave IR images (above)<\/strong><\/em> and 6.5 \u00b5m water vapor channel images (below) <\/strong><\/em>clearly demonstrate the dramatic reduction in noise — in these Sounder composite images, the western portion of the image is GOES-11 (GOES-West)<\/em> data, while the eastern portion of the image is either GOES-12 or GOES-13 (GOES-East)<\/em> data. In particular, the 6.5 \u00b5m water vapor image is “cleaner” on GOES-13 as a result of “colder” detectors on the newer spacecraft design, which more effectively radiate to space.<\/p>\n

\"GOES-12<\/a>

GOES-12 vs GOES-13 Sounder 6.5 \u00b5m water vapor channel images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

As of 18:34 UTC on 14 April 2010, GOES-13 (launched May 2006, with a Post Launch Test in December 2006) replaced GOES-12 (launched July 2001) as the operational GOES-East satellite\u00a0 — for more information, see the NOAA NESDIS Satellite Services Division. A sequence of AWIPS images (above) shows the last three GOES-12 visible images followed […]<\/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":[10,15,19,11,39],"tags":[],"class_list":["post-5116","post","type-post","status-publish","format-standard","hentry","category-general-interpretation","category-goes-sounder","category-goes-12","category-goes-13","category-training"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/5116","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=5116"}],"version-history":[{"count":30,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/5116\/revisions"}],"predecessor-version":[{"id":23686,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/5116\/revisions\/23686"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=5116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=5116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=5116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}