{"id":16699,"date":"2015-01-05T17:59:27","date_gmt":"2015-01-05T09:59:27","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/ships-deployed-into-the-atlantic-for-experimental-rocket-landing\/"},"modified":"2015-01-05T17:59:27","modified_gmt":"2015-01-05T09:59:27","slug":"ships-deployed-into-the-atlantic-for-experimental-rocket-landing","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/ships-deployed-into-the-atlantic-for-experimental-rocket-landing\/","title":{"rendered":"Ships deployed into the Atlantic for experimental rocket landing"},"content":{"rendered":"<figure id=\"attachment_2153\" aria-describedby=\"caption-attachment-2153\" style=\"width: 620px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" class=\" wp-image-2153\" src=\"http:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/asds_exposure_correction_no_water_smooth.jpg\" alt=\"An aerial view of SpaceX's rocket landing barge, named the Marmac 300 and unofficially christened the &quot;Autonomous Spaceport Drone Ship.&quot; Credit: SpaceX\" width=\"620\" height=\"466\" srcset=\"https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/asds_exposure_correction_no_water_smooth.jpg 1270w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/asds_exposure_correction_no_water_smooth-300x225.jpg 300w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/asds_exposure_correction_no_water_smooth-768x577.jpg 768w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/asds_exposure_correction_no_water_smooth-1024x769.jpg 1024w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/asds_exposure_correction_no_water_smooth-678x509.jpg 678w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/asds_exposure_correction_no_water_smooth-326x245.jpg 326w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/asds_exposure_correction_no_water_smooth-80x60.jpg 80w\" sizes=\"(max-width: 620px) 100vw, 620px\"><figcaption id=\"caption-attachment-2153\" class=\"wp-caption-text\">An aerial view of SpaceX\u2019s rocket landing barge, named the Marmac 300 and unofficially christened the \u201cAutonomous Spaceport Drone Ship.\u201d Credit: SpaceX<\/figcaption><\/figure>\n<p>An ocean-going barge and command ship chartered by SpaceX are stationed in the Atlantic Ocean off Florida\u2019s East Coast in a bid to recover a used-up Falcon 9 rocket stage Tuesday in a long-theorized \u2014 but never tried \u2014 maneuver that could lay the groundwork for a big advance in space technology.<\/p>\n<p>SpaceX intends to use Tuesday\u2019s experiment, which will come after the Falcon 9 booster lifts off from Cape Canaveral on a space station resupply flight, to demonstrate the viability of the company\u2019s concept to launch rockets and fly them back to Earth after deploying their payloads in space.<\/p>\n<p>If the rockets return unscathed, they could be refueled and launched again at a fraction of the cost of constructing an all-new launch vehicle.<\/p>\n<p>Engineers who have dreamed of a reusable launcher have had their visions stymied by technical and economic hurdles, but SpaceX \u2014 a privately-held company bankrolled by billionaire founder Elon Musk and venture capital funds \u2014 says it is serious about pursuing the goal.<\/p>\n<p>Burning leftover liquid fuel in its propellant tanks, the Falcon 9 rocket\u2019s first stage will fly back to Earth after finishing a nearly three-minute burn to send SpaceX\u2019s Dragon commercial cargo craft toward the space station. The descent of the first stage will occur just as the Falcon 9\u2019s single-engine upper stage puts the Dragon supply ship into orbit on course for a resupply run to the six-person space station crew.<\/p>\n<p>Tuesday\u2019s launch is scheduled for 6:20 a.m. EST (1120 GMT), roughly the moment the International Space Station\u2019s orbital track passes over Cape Canaveral.<\/p>\n<p>The first stage rocket booster, which stands approximately 15 stories tall, will plunge back through the atmosphere at hypersonic speed, firing a subset of its nine Merlin 1D engines three times to a controlled vertical landing on a barge positioned about 200 miles northeast of the Falcon 9\u2019s launch pad at Cape Canaveral.<\/p>\n<p>Other rockets are designed to be expendable and are destroyed during their fall back to Earth.<\/p>\n<p>Nothing like it has ever been tried before. Rocket engineers from several companies \u2014 including SpaceX\u2019s rocket team \u2014 have flown vertical takeoff and landing testbeds on short hops, and the space shuttle\u2019s solid rocket boosters parachuted to Earth for retrieval by ships in the Atlantic Ocean.<\/p>\n<p>SpaceX has also flown Falcon 9 boosters to two successful soft water landings in the Atlantic after space launches in April and July.<\/p>\n<p>What SpaceX is trying on Tuesday\u2019s launch is more dicey, and company officials are circumspect when talking about probability of pulling off the feat on the first attempt.<\/p>\n<p>\u201cReturning anything from space is a challenge, but returning a Falcon 9 first stage for a precision landing presents a number of additional hurdles,\u201d SpaceX said in a post on its website. \u201cAt 14 stories tall and traveling upwards of 1300 m\/s (2,900 mph), stabilizing the Falcon 9 first stage for reentry is like trying to balance a rubber broomstick on your hand in the middle of a wind storm.\u201d<\/p>\n<p><iframe loading=\"lazy\" width=\"678\" height=\"381\" src=\"https:\/\/www.youtube.com\/embed\/uIlu7szab5I?feature=oembed\" frameborder=\"0\" allowfullscreen=\"\"><\/iframe><\/p>\n<p>\u201cIt\u2019s probably not more than a 50 percent chance or less of landing it on the platform for the first time,\u201d Musk said in October during a forum at the Massachusetts Institute of Technology.<\/p>\n<p>In the long run, Musk says reusing rockets is vital to expanding access to space. He likes SpaceX\u2019s chances of achieving an intact landing of a rocket within the next year.<\/p>\n<p>\u201cThere are at least a dozen launches that will occur over the next 12 months, and I think it\u2019s quite likely \u2014 probably 80 to 90 percent likely \u2014 that one of those flights we\u2019ll be able to land and refly,\u201d Musk said. \u201cSo I think we\u2019re quite close.\u201d<\/p>\n<p>After attempts to recover Falcon rockets by parachute failed, SpaceX turned to a propulsive landing concept in which the booster\u2019s first stage engines would refire several times in flight to guide the rocket to controlled touchdown.<\/p>\n<p>SpaceX engineers have fine-tuned the descent system\u2019s design over the last year.<\/p>\n<p>The first try to land a Falcon 9 rocket stage after a September 2013 launch from Vandenberg Air Force Base in California succumbed to a high roll rate that starved its engines of fuel due to centrifugal forces. Engineers added more powerful nitrogen cold gas thrusters to stabilize the rocket\u2019s roll during descent during the next attempt in April, which accomplished a gentle splashdown in the Atlantic Ocean before it crashed on its side and disintegrated.<\/p>\n<p>The next full-up landing test in July \u2014 after a launch with six Orbcomm communications satellites \u2014 had a similar result.<\/p>\n<p>SpaceX eventually eyes flying its rocket boosters back to their launch sites to permit rapid reuse, but the company indicated in mid-2014 it might try landing a rocket on an ocean-going barge by the end of the year.<\/p>\n<p>In August, SpaceX filed challenges to a patent granted to Blue Origin, a space industry competitor owned by Amazon.com founder Jeff Bezos, describing a concept to land a rocket tail first on an ocean vessel after launching from a shore-based facility.<\/p>\n<p>SpaceX cited previous design work involving sea-based rocket landing pads before Blue Origin applied for the patent in 2009.<\/p>\n<p>\u201cThe \u2018rocket science\u2019 claimed in the \u2018321 patent was, at best, \u2018old hat\u2019 by 2009,\u201d SpaceX attorneys wrote in one of the patent challenge petitions.<\/p>\n<p>While SpaceX is on the verge of attempting a barge landing, Blue Origin has not disclosed any near-term plans to demonstrate the concept. The first flight of Blue Origin\u2019s orbital launch vehicle is years away.<\/p>\n<p>The patent dispute is still unresolved, but SpaceX is pressing ahead with the planned precision landing at sea.<\/p>\n<figure id=\"attachment_2155\" aria-describedby=\"caption-attachment-2155\" style=\"width: 620px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-2155\" src=\"http:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/US08678321-20140325-D00000.png\" alt=\"A diagram of rocket recovery at sea from Blue Origin's patent filing. SpaceX is challenging the patent. Credit: Blue Origin\" width=\"620\" height=\"343\" srcset=\"https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/US08678321-20140325-D00000.png 2907w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/US08678321-20140325-D00000-300x166.png 300w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/US08678321-20140325-D00000-768x425.png 768w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2014\/12\/US08678321-20140325-D00000-1024x566.png 1024w\" sizes=\"(max-width: 620px) 100vw, 620px\"><figcaption id=\"caption-attachment-2155\" class=\"wp-caption-text\">A diagram of rocket recovery at sea from Blue Origin\u2019s patent filing. SpaceX is challenging the patent. Credit: Blue Origin<\/figcaption><\/figure>\n<p>Four carbon fiber and aluminum honeycomb landing legs are mounted at the base of the 12-foot-diameter Falcon 9 first stage. They will deploy to a span of about 70 feet moments before touchdown.<\/p>\n<p>\u201cTo help stabilize the stage and to reduce its speed, SpaceX relights the engines for a series of three burns,\u201d SpaceX wrote on its website. \u201cThe first burn \u2014 the boostback burn \u2014 adjusts the impact point of the vehicle and is followed by the supersonic retro propulsion burn that, along with the drag of the atmosphere, slows the vehicle\u2019s speed from 1300 m\/s (2,900 mph) to about 250 m\/s (559 mph). The final burn is the landing burn, during which the legs deploy and the vehicle\u2019s speed is further reduced to around 2 m\/s (4.5 mph).\u201d<\/p>\n<p>The SpaceX landing pad \u2014 dubbed the autonomous spaceport drone ship \u2014 is officially named the Marmac 300. It is registered under the ownership of Metairie, La.-based McDonough Marine Service and carries ballast water tanks and repurposed underwater thrusters to hold position in the Atlantic Ocean.<\/p>\n<p>The cargo barge was prepared for its rocket landing mission at a Louisiana shipyard, then it moved to a staging point in Jacksonville, Fla.<\/p>\n<p>Photos of the vessel docked at the Port of Jacksonville showed technicians preparing the barge for departure to the Falcon 9 rocket\u2019s landing point. Nearby vessels, presumed to be a tug and command ship, also showed signs of rocket-related activity such as the presence of high-tech space communications gear.<\/p>\n<p>According to data from maritime tracking websites, the Marmac 300\u2019s tug and its control ship were nearing the landing zone early Monday.<\/p>\n<p>Information released in notices to pilots, mariners and in a federal regulatory filing show the ships will be positioned near 30.8 degrees north latitude and 78.1 degrees east longitude.<\/p>\n<figure id=\"attachment_2637\" aria-describedby=\"caption-attachment-2637\" style=\"width: 620px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2637\" src=\"http:\/\/spaceflightnow.com\/wp-content\/uploads\/2015\/01\/crs5_f9r_recoverymap.png\" alt=\"The Falcon 9 rocket's first stage is targeted to land about 200 miles northeast of Cape Canaveral, or about 165 miles southeast of Charleston, S.C.\" width=\"620\" height=\"399\" srcset=\"https:\/\/spaceflightnow.com\/wp-content\/uploads\/2015\/01\/crs5_f9r_recoverymap.png 620w, https:\/\/spaceflightnow.com\/wp-content\/uploads\/2015\/01\/crs5_f9r_recoverymap-300x193.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\"><figcaption id=\"caption-attachment-2637\" class=\"wp-caption-text\">The Falcon 9 rocket\u2019s first stage is targeted to land about 200 miles northeast of Cape Canaveral, or about 165 miles southeast of Charleston, S.C.<\/figcaption><\/figure>\n<p>If the first stage lands intact, sources said the rocket will lock on to the Marmac 300 barge and technicians will vent propellants and toxic substances carried inside the booster before it starts a two-day journey back to port.<\/p>\n<p>McDonough Marine Service\u2019s website says the Marmac 300 is 300 feet long and 100 feet wide \u2014 the size of a football field. Musk tweeted last month the Falcon 9 landing barge has extendable wings to expand the width to 170 feet.<\/p>\n<p>\u201cWhile that may sound huge at first, to a Falcon 9 first stage coming from space, it seems very small,\u201d SpaceX wrote on its website. \u201cThe legspan of the Falcon 9 first stage is about 70 feet and while the ship is equipped with powerful thrusters to help it stay in place, it is not actually anchored, so finding the bullseye becomes particularly tricky. During previous attempts, we could only expect a landing accuracy of within 10 km (6 miles). For this attempt, we\u2019re targeting a landing accuracy of within 10 meters (32 feet).\u201d<\/p>\n<p>The Marmac 300 is emblazoned with a SpaceX logo in the center of a bullseye painted on a black deck.<\/p>\n<p>For Tuesday\u2019s launch and landing experiment, SpaceX engineers added fins near the top of the Falcon 9\u2019s first stage to add stability as the rocket falls back to Earth. The hypersonic grid fins are arranged in an \u201cX-wing\u201d configuration around the circumference of the launcher and remain stowed during liftoff before popping open on reentry.<\/p>\n<p>\u201cEach fin moves independently for roll, pitch and yaw, and combined with the engine gimbaling, will allow for precision landing \u2014 first on the autonomous spaceport drone ship, and eventually on land,\u201d SpaceX said in its online update Tuesday.<\/p>\n<p>\u201cBefore we boost back to the launch site, and try to land there, we need to show that we can land with precision over and over again,\u201d Musk said in October. \u201cOtherwise, something bad could happen if it doesn\u2019t boost back to where we intended.\u201d<\/p>\n<p>If the landing experiment is a success, engineers will examine the booster\u2019s structure, propellant tanks and engines to determine what work is needed to refurbish the first stage and fly it again.<\/p>\n<p>Musk has said SpaceX\u2019s goal is the \u201crapid and complete\u201d reusability of the Falcon 9\u2019s booster stage. He said the rocket\u2019s upper section, which enters orbit with each mission\u2019s payload, may continue to be a throwaway component of the launcher until a new generation of rockets start flying.<\/p>\n<p>But SpaceX\u2019s quest to demonstrate a reusable booster will be restricted to a fraction of the company\u2019s launches in the next few years. SpaceX officials say some of their flights, such as Falcon 9 launches with heavy commercial communications satellites and military missions, will not have enough leftover fuel to devote to a guided descent of the rocket.<\/p>\n<p>When the company\u2019s Falcon Heavy rocket starts flying \u2014 a maiden launch is planned as soon as late this year \u2014 more launches will have fuel to spare to get rocket stages back on the ground.<\/p>\n<p>A launch is often one of the most expensive parts of a space mission for human crews, commercial and military satellites, and scientific probes. Saving the rocket booster and launching it repeatedly could dramatically cut the cost of spaceflight, according to SpaceX.<\/p>\n<p>\u201cThe reason why there\u2019s low demand for spaceflight is because it\u2019s ridiculously expensive, and so at some point someone has to say, \u2018We\u2019re going to make something that\u2019s much more affordable and then see what applications develop.\u2019 That\u2019s what has to happen,\u201d Musk said.<\/p>\n<p><b><i>Follow Stephen Clark on Twitter: @StephenClark1.<\/i><\/b><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An aerial view of SpaceX\u2019s rocket landing barge, named the Marmac 300 and unofficially christened the \u201cAutonomous Spaceport Drone Ship.\u201d Credit: SpaceX An ocean-going barge and command ship chartered by SpaceX are stationed in the Atlantic Ocean off Florida\u2019s East Coast in a bid to recover a used-up Falcon 9 rocket stage Tuesday in a [&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":[3799,479,316,4157],"class_list":["post-16699","post","type-post","status-publish","format-standard","hentry","category-news","tag-autonomous-spaceport-drone-ship","tag-falcon-9","tag-spacex","tag-spacex-5"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/16699"}],"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=16699"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/16699\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=16699"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=16699"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=16699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}