{"id":16490,"date":"2015-03-10T20:58:03","date_gmt":"2015-03-10T12:58:03","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/atlas-mms-launch-timeline\/"},"modified":"2015-03-10T20:58:03","modified_gmt":"2015-03-10T12:58:03","slug":"atlas-mms-launch-timeline","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/atlas-mms-launch-timeline\/","title":{"rendered":"Atlas\/MMS launch timeline"},"content":{"rendered":"

CAPE CANAVERAL \u2014 This is the ascent timeline to be followed by the United Launch Alliance Atlas 5 rocket in launching NASA\u2019s MMS mission on March 12 at 10:44 p.m. EDT.<\/p>\n

T+0:00:00.0    Liftoff<\/strong>
\n\"Atlas
\nWith the RD-180 main engine running, the twin strap-on solid rocket boosters are lit as the Atlas 5 vehicle lifts off and begins a vertical rise away from Complex 41 at Cape Canaveral Air Force Station, Florida.<\/p>\n

T+0:01:02.5: Max Q<\/strong><\/p>\n

\"maxq\"<\/p>\n

The Atlas rocket passes through the region of maximum dynamic pressure during ascent through the lower atmosphere.<\/p>\n

T+0:02:18.6    Jettison SRBs<\/strong><\/p>\n

\"03srb\"<\/p>\n

Having burned out of propellant approximately 45 seconds earlier, the spent solid rocket boosters are jettisoned to fall into the Atlantic Ocean.<\/p>\n

T+0:04:09.7    Main Engine Cutoff<\/strong><\/p>\n

\"04beco\"<\/p>\n

The RD-180 main engine completes its firing after consuming its kerosene and liquid oxygen fuel supply in the Atlas first stage.<\/p>\n

T+0:04:15.7    Stage Separation<\/strong><\/p>\n

\"05staging\"<\/p>\n

The Common Core Booster first stage of the Atlas 5 rocket separates from the Centaur upper stage. Over the next few seconds, the Centaur engine liquid hydrogen and liquid oxygen systems are readied for ignition.<\/p>\n

T+0:04:25.7    Centaur Ignition 1<\/strong><\/p>\n

\"06mes1\"<\/p>\n

The Centaur RL10 engine ignites for the first of two upper stage firings. This burn will inject the Centaur stage and MMS spacecraft into an initial parking orbit.<\/p>\n

T+0:04:33.7    Nose Cone Jettison<\/strong><\/p>\n

\"07fairing\"<\/p>\n

The payload fairing that protected the MMS spacecraft during launch is separated once heating levels drop to predetermined limits after passage through the atmosphere.<\/p>\n

T+0:13:29.0    Centaur Cutoff 1<\/strong><\/p>\n

\"08meco1\"<\/p>\n

The Centaur engine shuts down after arriving in a planned low-Earth parking orbit. The vehicle enters a 59-minute coast period before arriving at the required location in space for the second burn.<\/p>\n

T+1:12:29.8    Centaur Ignition 2<\/strong><\/p>\n

\"09mes2\"<\/p>\n

A final push by Centaur is ignited to raise the orbit for the MMS spacecraft into a highly elliptical Earth orbit.<\/p>\n

T+1:18:11.3    Centaur Cutoff 2<\/strong><\/p>\n

\"10meco2\"<\/p>\n

The powered phase of flight is concluded as the Centaur reaches the planned orbit of 316 by 37,886 nautical miles and 28.77 degrees inclination.<\/p>\n

T+1:32:11.3    MMS-4 Separation<\/strong><\/p>\n

\"mms4\"<\/p>\n

The first Magnetospheric Multiscale observatories is separated into orbit.<\/p>\n

T+1:37:11.3    MMS-3 Separation<\/strong><\/p>\n

\"mms3\"<\/p>\n

The second Magnetospheric Multiscale observatories is separated into orbit.<\/p>\n

T+1:42:11.3    MMS-2 Separation<\/strong><\/p>\n

\"mms2\"<\/p>\n

The third Magnetospheric Multiscale observatories is separated into orbit.<\/p>\n

T+1:47:11.3    MMS-1 Separation<\/strong><\/p>\n

\"mms1\"<\/p>\n

The fourth Magnetospheric Multiscale observatories is separated into orbit from the Centaur upper stage to complete the launch.<\/p>\n","protected":false},"excerpt":{"rendered":"

CAPE CANAVERAL \u2014 This is the ascent timeline to be followed by the United Launch Alliance Atlas 5 rocket in launching NASA\u2019s MMS mission on March 12 at 10:44 p.m. EDT. T+0:00:00.0    Liftoff With the RD-180 main engine running, the twin strap-on solid rocket boosters are lit as the Atlas 5 vehicle lifts off and […]<\/p>\n","protected":false},"author":1,"featured_media":0,"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":[3222,4116,4117,190,750],"class_list":["post-16490","post","type-post","status-publish","format-standard","hentry","category-news","tag-ascent","tag-av-053","tag-mms","tag-nasa","tag-united-launch-alliance"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/16490"}],"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=16490"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/16490\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=16490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=16490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=16490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}