{"id":14195,"date":"2017-11-15T00:43:31","date_gmt":"2017-11-14T16:43:31","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/delta-2-launch-timeline-with-jpss-1\/"},"modified":"2017-11-15T00:43:31","modified_gmt":"2017-11-14T16:43:31","slug":"delta-2-launch-timeline-with-jpss-1","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/delta-2-launch-timeline-with-jpss-1\/","title":{"rendered":"Delta 2 launch timeline with JPSS 1"},"content":{"rendered":"<p><strong>EDITOR\u2019S NOTE: Updated at 9 a.m. EST (1400 GMT) on Nov. 14 after launch scrub and on Nov. 17 in advance of third launch attempt.<br \/>\n<\/strong><\/p>\n<p><iframe loading=\"lazy\" width=\"678\" height=\"381\" src=\"https:\/\/www.youtube.com\/embed\/tLkbdYZyf1c?feature=oembed\" frameborder=\"0\" gesture=\"media\" allowfullscreen=\"\"><\/iframe><\/p>\n<p>A Delta 2 rocket boosted by nine strap-on motors and two liquid-fueled stages will launch NOAA\u2019s JPSS 1 weather satellite into a 511-mile-high (822-kilometer) orbit following liftoff from Vandenberg Air Force Base, California.<\/p>\n<p>It will take 57-and-a-half minutes to deliver the JPSS 1 satellite to orbit from liftoff until spacecraft separation.<\/p>\n<p>Launch is set for a 66-second window opening at 1:47:03 a.m. PST (4:47:03 a.m. EST; 0947:03 GMT) Saturday from Space Launch Complex 2-West at Vandenberg after two scrubbed countdowns earlier in the week.<\/p>\n<p>The command to start the Delta 2\u2019s first stage RS-27A main engine is set for T-minus 2.7 seconds. After passing a computer health check, six of the Delta 2\u2019s nine strap-on solid rocket boosters will ignite to send the launcher south from Vandenberg, following an arcing trajectory over the Pacific Ocean bound for polar orbit.<\/p>\n<p>The RS-27A engine, manufactured by Aerojet Rocketdyne, will generate around 200,000 pounds of thrust at liftoff, consuming a mix of RP-1 kerosene and liquid oxygen. Each 40-inch-diameter (1-meter) booster ramps up to 145,000 pounds of thrust in vacuum.<\/p>\n<p>The Delta 2 will surpass the speed of sound in 32 seconds and reach the phase of flight with maximum aerodynamic pressure at approximately T+plus 48 seconds. The six ground-lit boosters will burn for about 63 seconds, and three air-lit boosters will ignite around two seconds later to continue the climb into space.<\/p>\n<p>The six burned-out motors will release in sets of three from the Delta 2 at about T+plus 1 minute, 26 seconds, jettisoning once the launcher is clear of offshore oil rigs. The other three boosters will consume their pre-packed solid propellants before separating to fall into the Pacific Ocean at T+plus 2 minutes, 12 seconds.<\/p>\n<p>The Delta 2\u2019s main engine will continue firing until T+plus 4 minutes, 23 seconds. Seven seconds later, the rocket\u2019s first stage will detach, giving way to the upper stage\u2019s AJ10-118K engine to ignite at T+plus 4 minutes, 37 seconds.<\/p>\n<p>Separation of the launcher\u2019s composite nose fairing is scheduled for T+plus 4 minutes, 41 seconds, once the Delta 2 is out of the lower atmosphere, exposing the JPSS 1 satellite to space for the first time.<\/p>\n<figure id=\"attachment_28551\" aria-describedby=\"caption-attachment-28551\" style=\"width: 550px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" class=\" wp-image-28551\" src=\"https:\/\/spaceflightnow.com\/wp-content\/uploads\/2017\/11\/d2_jpss1_profile.png\" alt=\"\" width=\"550\" height=\"700\" srcset=\"https:\/\/spaceflightnow.com\/wp-content\/uploads\/2017\/11\/d2_jpss1_profile.png 480w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2017\/11\/d2_jpss1_profile-236x300.png 236w\" sizes=\"(max-width: 550px) 100vw, 550px\"><figcaption id=\"caption-attachment-28551\" class=\"wp-caption-text\">Credit: ULA<\/figcaption><\/figure>\n<p>Burning a blend of Aerozine 50 and nitrogen tetroxide storable liquid propellants, the second stage engine will fire until T+plus 10 minutes, 38 seconds, to place the JPSS 1 spacecraft in a preliminary egg-shaped elliptical orbit.<\/p>\n<p>After coasting over Antarctica, the AJ10-118K engine will reignite at T+plus 50 minutes, 50 seconds. The 24-second burn will circularize the upper stage\u2019s orbit at an altitude of approximately 511 miles (822 kilometers) and an inclination of 98.7 degrees for deployment of the JPSS 1 weather satellite at T+plus 57 minutes, 30 seconds.<\/p>\n<p>A third upper stage maneuver at T+plus 1 hour, 15 minutes, will last for 10 seconds to fine-tune the orbit for release of five CubeSat secondary payloads sponsored by NASA and developed by universities and institutions in Arizona, Idaho, Massachusetts, Tennessee and Australia.<\/p>\n<p>The CubeSats will pop out of their launch containers beginning at T+plus 1 hour, 21 minutes, 40 seconds.<\/p>\n<p>One more second stage firing will de-orbit the rocket to burn up in Earth\u2019s atmosphere.<\/p>\n<p><b><i>Email the author.<\/i><\/b><\/p>\n<p><em><strong>Follow Stephen Clark on Twitter: @StephenClark1.<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>EDITOR\u2019S NOTE: Updated at 9 a.m. EST (1400 GMT) on Nov. 14 after launch scrub and on Nov. 17 in advance of third launch attempt. A Delta 2 rocket boosted by nine strap-on motors and two liquid-fueled stages will launch NOAA\u2019s JPSS 1 weather satellite into a 511-mile-high (822-kilometer) orbit following liftoff from Vandenberg Air [&hellip;]<\/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":[1665,1807,159,2648,3122,2206,975,2622],"class_list":["post-14195","post","type-post","status-publish","format-standard","hentry","category-news","tag-ball-aerospace","tag-delta-2","tag-earth-observation","tag-jpss","tag-jpss-1","tag-launch-timeline","tag-noaa","tag-space-launch-complex-2-west"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/14195"}],"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=14195"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/14195\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=14195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=14195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=14195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}