{"id":37928,"date":"2019-08-22T23:47:26","date_gmt":"2019-08-22T15:47:26","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/delta-iv-mediums-well-earned-retirement-with-gps-finale\/"},"modified":"2019-08-22T23:47:26","modified_gmt":"2019-08-22T15:47:26","slug":"delta-iv-mediums-well-earned-retirement-with-gps-finale","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/delta-iv-mediums-well-earned-retirement-with-gps-finale\/","title":{"rendered":"Delta IV Medium\u2019s well-earned retirement with GPS finale"},"content":{"rendered":"<p>Nearly 17 years after it inaugurated the Delta IV family\u2019s flight history, a Medium+ (4,2) configuration of a rocket that traces its lineage to the start of the space program bows out of operational service on Thursday with one final mission for the U.S. Air Force.&nbsp;<\/p>\n<p>The swansong flight for the Delta IV Medium from United Launch Alliance launched inside a 27-minute window at 09:06 EDT (13:06 UTC) from Space Launch Complex 37B at the Cape Canaveral Air Force Station on a mission to place the second GPS III satellite for the Air Force into orbit.<\/p>\n<p><b>Fare thee well, Delta IV Medium:<\/b><\/p>\n<p>Developed specifically to serve U.S. National Security space needs, the Delta IV rocket represented an increase in capability, safety, and reliability from the Delta II rockets, which continued to serve throughout most of Delta IV\u2019s operational life.<\/p>\n<p>Roaring to life for the first time on 20 November 2002, a Delta IV Medium+ (4,2) configuration rocket inaugurated the Delta IV family\u2019s life with the commercial launch of the Eutelsat W5 telecommunications satellite to Geostationary Transfer Orbit.<\/p>\n<p>Since that first launch, 40 Delta IV rocket family missions (counting this launch) have been conducted by United Launch Alliance (ULA).<\/p>\n<\/p>\n<p><iframe title=\"2002 Nov 20:  Delta IV First Launch -- EutelSat W5\" src=\"https:\/\/www.youtube.com\/embed\/GLVyAV9_QOU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen=\"\" name=\"fitvid0\" data-gtm-yt-inspected-14=\"true\" data-gtm-yt-inspected-21=\"true\"><\/iframe><\/p>\n<p>Of those, 29 have been flights of the various Medium configurations.&nbsp; And of those 29, 15 have been Medium+ (4,2) variants, making the + (4,2) the most-flown Delta IV configuration to date.<\/p>\n<p>Rocket building kits<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>Space Shuttle models<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>Technology News<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>\n<p>     (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n<p>Thus, it is fitting that the Medium variant which started the entire Delta IV history will be the same configuration to bring the Medium variants\u2019 services to a close.<\/p>\n<p>Flying with a 4 meter payload fairing, a 4 m diameter Delta Cryogenic Second Stage (DCSS), a 5 m diameter Common Booster Core, and two strap on solid rocket motors, the final Delta IV Medium performed a pitch and roll maneuver shortly after liftoff, aligning itself onto the correct azimuth to place the second GPS III satellite into a 55\u00b0 inclination orbit.<\/p>\n<p>After reaching its initial parking orbit, the DCSS coasted for just under an hour before reigniting for a roughly three and a half minute burn.<\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Time<\/b><\/td>\n<td><b>Mission Event<\/b><\/td>\n<\/tr>\n<tr>\n<td>T-5 secs<\/td>\n<td>RS-68A Common Booster Core engine ignition<\/td>\n<\/tr>\n<tr>\n<td>00:00:00<\/td>\n<td>Solid rocket motor ignition \/ Liftoff<\/td>\n<\/tr>\n<tr>\n<td>T+ 6secs<\/td>\n<td>Begin Pitch\/Yaw\/Roll maneuver<\/td>\n<\/tr>\n<tr>\n<td>T+ 58.5 seconds<\/td>\n<td>Max-Q<\/td>\n<\/tr>\n<tr>\n<td>T+ 1min 40secs<\/td>\n<td>Solid rocket motor jettison<\/td>\n<\/tr>\n<tr>\n<td>T+ 3mins 55.9secs<\/td>\n<td>RS-68A Core engine cutoff<\/td>\n<\/tr>\n<tr>\n<td>T+ 4mins 02.4secs<\/td>\n<td>First stage separation<\/td>\n<\/tr>\n<tr>\n<td>T+ 4mins 16.9secs<\/td>\n<td>DCSS engine start<\/td>\n<\/tr>\n<tr>\n<td>T+ 4mins 26.9secs<\/td>\n<td>Payload fairing jettison<\/td>\n<\/tr>\n<tr>\n<td>T+ 13mins 33.1secs<\/td>\n<td>DCSS engine cutoff 1<\/td>\n<\/tr>\n<tr>\n<td>T+ 1hr 06mins 47.6secs<\/td>\n<td>DCSS engine start 2<\/td>\n<\/tr>\n<tr>\n<td>T+ 1hr 10mins 14.6secs<\/td>\n<td>DCSS engine cutoff 2<\/td>\n<\/tr>\n<tr>\n<td>T+ 1hr 55mins 26.6secs<\/td>\n<td>GPS III separation<\/td>\n<\/tr>\n<tr>\n<td>T+ 2hrs 30mins 55.2secs<\/td>\n<td>DCSS engine start 3<\/td>\n<\/tr>\n<tr>\n<td>T+ 2hrs 31mins 10.5secs<\/td>\n<td>DCSS engine cutoff 3<\/td>\n<\/tr>\n<tr>\n<td>T+ 3hrs 07mins 50.5secs<\/td>\n<td>End of mission<\/td>\n<\/tr>\n<tr>\n<td>T+ 7hrs 08mins 36.3secs<\/td>\n<td>Ocean impact<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The first post-orbit insertion burn raised the overall orbit to the correct altitude for spacecraft separation.<\/p>\n<p>When GPS III popped off the top of the Delta IV, it was in a 1,200 x 20,185 km orbit.<\/p>\n<p>After delivering its payload, the DCSS will perform a deorbit maneuver two and a half hours after liftoff, which will alter its orbit to send the stage into a destructive impact with the ocean 7 hours 8 minutes after launch.<\/p>\n<p>This deorbit operation of the second stage is part of a growing trend with launch providers to deorbit spent rocket stages whenever possible to mitigate the space debris environment surrounding Earth.<\/p>\n<p><b>The beginning of the end for Delta IV:<\/b><\/p>\n<p>Speaking directly to NASASpaceflight\u2019s Chris Gebhardt regarding the retirement of the Delta IV Medium and the entire Delta rocket line in general, Tony Taliancich, Director and General Manager of Launch Operations for United Launch Alliance said, \u201cIt\u2019s certainly an emotional event as we retire the Delta name and system.&nbsp;<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-60659\" class=\"size-full wp-image-60659\" src=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2019\/03\/A3.jpg\" alt=\"\" width=\"2500\" height=\"1406\" srcset=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2019\/03\/A3.jpg 2500w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2019\/03\/A3-350x197.jpg 350w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2019\/03\/A3-622x350.jpg 622w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2019\/03\/A3-768x432.jpg 768w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2019\/03\/A3-1920x1080.jpg 1920w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2019\/03\/A3-1170x658.jpg 1170w\" sizes=\"(max-width: 2500px) 100vw, 2500px\"><\/p>\n<p id=\"caption-attachment-60659\" class=\"wp-caption-text\">The mighty fury of the Delta IV Medium+ (5,4) with WGS-10 on 15 March 2019. (Credit: Nathan Barker for NSF\/L2)<\/p>\n<p>\u201cBut if you think about it, Delta goes back to the early 60s to the beginning of the space age with Thor and some of the other systems.&nbsp; And so that Delta lineage that has provided so much support to not just national security but to science exploration and commercial development of space for the world has been a really significant and emotional heritage that we\u2019re connected to.\u201d<\/p>\n<h4 class=\"widget-title penci-border-arrow\">See Also<\/h4>\n<ul>\n<li>LIVE: Delta IV M+ 4,2\/GPSIII Updates<\/li>\n<li>ULA Forum Section<\/li>\n<li>L2 Historical&nbsp;Section<\/li>\n<li>Click here to Join L2<\/li>\n<\/ul>\n<p>While this is the end for the Delta IV Medium, the processes it brought to the Delta IV family will continue.<\/p>\n<p>\u201cReally for the Delta IV Medium there\u2019s very little in terms of the infrastructure that changes\u201d following its retirement, said Mr. Taliancich when asked about what ground and flight systems might need to be changed or decommissioned to exclusively accommodate Delta IV Heavy rockets until 2024.<\/p>\n<p>\u201cThere\u2019s tooling and [Ground Support Equipment], lifting and tooling frames and structures that are specific to the Medium.&nbsp; Some of the access platforms associated with it will be retired, scrapped or modified to some other purpose. But we do have several more Delta IV Heavy launches going on for the next few years, so that will require us to maintain all of the systems.\u201d<\/p>\n<p>Unlike other rocket retirements \u2013 even within ULA \u2013 that had full flight spares available upon retirement, there are no such spares for Delta IV Medium because the Atlas V rocket covers the range of missions a Delta IV Medium could support.<\/p>\n<p><iframe id=\"twitter-widget-1\" scrolling=\"no\" frameborder=\"0\" allowtransparency=\"true\" allowfullscreen=\"true\" class=\"\" style=\"position: absolute; visibility: hidden; width: 0px; height: 0px; display: block; flex-grow: 1;\" title=\"X Post\" src=\"https:\/\/platform.twitter.com\/embed\/Tweet.html?creatorScreenName=NASASpaceflight&amp;dnt=true&amp;embedId=twitter-widget-1&amp;features=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%3D%3D&amp;frame=false&amp;hideCard=false&amp;hideThread=false&amp;id=1106965828799471616&amp;lang=en&amp;origin=https%3A%2F%2Fwww.nasaspaceflight.com%2F2019%2F08%2Fdelta-iv-medium-retirement-gps-finale%2F&amp;sessionId=591f0f722e0217be1db0f8d8d169fc78606d29b3&amp;siteScreenName=NASASpaceflight&amp;theme=light&amp;widgetsVersion=6a3ad42b224df%3A1778106238597&amp;width=550px\" data-gtm-yt-inspected-14=\"true\" data-gtm-yt-inspected-21=\"true\" data-tweet-id=\"1106965828799471616\"><\/iframe><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\" data-twitter-extracted-i1783498237471782697=\"true\">\n<p lang=\"en\" dir=\"ltr\">Two remotes from last night&#8217;s #deltaiv launch of #WGS10. I&#8217;m off to take on Orlando traffic. High res on L2 with more to come later. <\/p>\n<p>@ChrisG_NSF @NASASpaceflight @ulalaunch pic.twitter.com\/phQWFjdEFP<\/p>\n<p>\u2014 Mike Deep (@mike_deep) March 16, 2019<\/p>\n<\/blockquote>\n<p>If a customer came to ULA tomorrow and said they wanted to go on a Delta IV Medium, the Atlas V would serve as the launcher instead.<\/p>\n<p>And that actually points to a key factor in ULA\u2019s decision to phase out the Delta IV Medium and the Delta IV family altogether over the next five years.<\/p>\n<p>\u201cIn 2015 we looked at the fleet and decided that it didn\u2019t make financial sense to have two product lines [Atlas and Delta] where we were competing with ourselves,\u201d related Mr. Taliancich.<\/p>\n<p>\u201cSo in looking at that, the more competitive system was Atlas, and then obviously to provide long-term competitive capability we needed to design and develop a new system.&nbsp; So that\u2019s Vulcan-Centaur.&nbsp;&nbsp;<\/p>\n<p>\u201cAnd Vulcan-Centaur takes the best of both systems \u2013 the best of the best from both Atlas and Delta \u2013 and merges them together to provide the full range of capabilities from short to medium on a single stick system.\u201d<\/p>\n<p>In this way, even though the Delta name will be retired next decade, its heritage from the beginning of the space program will continue to propel ULA\u2019s and humanity\u2019s efforts in space forward for years to come.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nearly 17 years after it inaugurated the Delta IV family\u2019s flight history, a Medium+ (4,2) configuration of a rocket that traces its lineage to the start of the space program bows out of operational service on Thursday with one final mission for the U.S. Air Force.&nbsp; The swansong flight for the Delta IV Medium from [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":26785,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[8296,363],"class_list":["post-37928","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-delta-iv","tag-ula"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/37928"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=37928"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/37928\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media\/26785"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=37928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=37928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=37928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}