{"id":53479,"date":"2023-07-17T15:24:43","date_gmt":"2023-07-17T15:24:43","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=53479"},"modified":"2023-07-17T16:08:35","modified_gmt":"2023-07-17T16:08:35","slug":"using-data-from-nodd-and-polar2grid-to-create-animations-with-jpss-data","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/53479","title":{"rendered":"Using data from NODD and Polar2Grid to create animations with JPSS data"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"960\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/07\/npp_noaa20_noaa21_viirs_i01_20230717_0246_to_0358_GuamPolar_step_anim.gif\" alt=\"\" class=\"wp-image-53480\"\/><figcaption class=\"wp-element-caption\">I01 (Visible imagery at 0.64 \u00b5m) from Suomi NPP (0246 UTC), NOAA-20 (0337 UTC) and NOAA-21 (0358 UTC) on 17 July 2023 (click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>The presence of three JPSS satellites &#8212; Suomi NPP, NOAA-20 and NOAA-21 &#8212; allows for animations at high resolution (I01 imagery on VIIRS has 375-m resolution) at even low latitudes.  The animation over the island of Guam (at 13.4<sup>o<\/sup>N) shows the evolution of clouds between 0246 and 0358 UTC on 17 July 2023.  These data were downloaded from the NOAA <a href=\"https:\/\/www.noaa.gov\/information-technology\/open-data-dissemination\">NODD<\/a> and processed with Polar2Grid v 3.0 as described <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/52173\">here<\/a>.  This requires downloading granules from the <code><strong>VIIRS-I1-SDR<\/strong><\/code> directory and geolocation data from the <code><strong>VIIRS-IMG-GEO<\/strong><\/code> directory at the NODD websites.  Whether or not good coverage is available (and when it happens!) can be shown a day to three in advance at the SSEC Polar Orbit Tracking website, which includes graphics over the western Pacific for <a href=\"https:\/\/www.ssec.wisc.edu\/datacenter\/polar_orbit_tracks\/data\/NPP\/2023\/2023_07_17_198\/HIMAWARI.gif\">Suomi-NPP<\/a>, <a href=\"https:\/\/www.ssec.wisc.edu\/datacenter\/polar_orbit_tracks\/data\/JPSS-1\/2023\/2023_07_17_198\/HIMAWARI.gif\">NOAA-20<\/a> and <a href=\"https:\/\/www.ssec.wisc.edu\/datacenter\/polar_orbit_tracks\/data\/NOAA21\/2023\/2023_07_17_198\/HIMAWARI.gif\">NOAA-21<\/a>.  Knowing when the data will be available means a timely image can be made.  Note that the resolution of the images above has been reduced to 1 km!<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Geostationary satellites also show imagery over the same region. Himawari-9 visible (band 3, 0.64 \u00b5m) imagery, below, has been processed using Geo2Grid software operating on Himawari-9 HSD files (that, like JPSS data files, are available online).  The animation below shows Band 3 imagery over the same domain as above, from 0250-0400 at 10-minute intervals.  Whether or not a user needs high spatial resolution (far better with JPSS data, especially in the infrared) or better temporal resolution is a question best answered by the phenomena that are being investigated.  If there were a small fire on Guam, for example, JPSS data with a 375-km resolution at 3.74 \u00b5m is more likely to detect it than Himawari-9 Band 7 imagery (3.8 \u00b5m) with 2-km nadir resolution.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/07\/HIMAWARI-9_AHI_B03_20230717_0250_to_0400_Guam_anim.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"960\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/07\/HIMAWARI-9_AHI_B03_20230717_0250_to_0400_Guam_anim.gif\" alt=\"\" class=\"wp-image-53484\"\/><\/a><figcaption class=\"wp-element-caption\">Himawari-9 Band 3 visible imagery (0.64 \u00b5m), 0250-0400 UTC on 17 July 2023 (Click to enlarge)<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The presence of three JPSS satellites &#8212; Suomi NPP, NOAA-20 and NOAA-21 &#8212; allows for animations at high resolution (I01 imagery on VIIRS has 375-m resolution) at even low latitudes. The animation over the island of Guam (at 13.4oN) shows the evolution of clouds between 0246 and 0358 UTC on 17 July 2023. These data [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":53481,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[73,78,131,49,48],"tags":[],"class_list":["post-53479","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-himawari-9","category-noaa-20","category-noaa-21","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53479","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=53479"}],"version-history":[{"count":4,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53479\/revisions"}],"predecessor-version":[{"id":53487,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53479\/revisions\/53487"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/53481"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=53479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=53479"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=53479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}