{"id":18279,"date":"2018-11-08T19:40:22","date_gmt":"2018-11-08T11:40:22","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/spacex-sets-its-sights-on-a-lower-orbit-for-starlink-broadband-networks-first-satellites\/"},"modified":"2018-11-08T19:40:22","modified_gmt":"2018-11-08T11:40:22","slug":"spacex-sets-its-sights-on-a-lower-orbit-for-starlink-broadband-networks-first-satellites","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/spacex-sets-its-sights-on-a-lower-orbit-for-starlink-broadband-networks-first-satellites\/","title":{"rendered":"SpaceX sets its sights on a lower orbit for Starlink broadband network\u2019s first satellites"},"content":{"rendered":"<figure id=\"attachment_316083\" aria-describedby=\"caption-attachment-316083\" style=\"width: 630px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full-width wp-image-316083\" src=\"https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2017\/03\/170308-constel-patentyogi-630x497.jpg\" alt=\"Satellite arrangement\" width=\"630\" height=\"497\" srcset=\"https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2017\/03\/170308-constel-patentyogi-630x497.jpg 630w, https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2017\/03\/170308-constel-patentyogi-768x605.jpg 768w, https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2017\/03\/170308-constel-patentyogi.jpg 1035w\" sizes=\"(max-width: 630px) 100vw, 630px\"><figcaption data-nosnippet=\"\" id=\"caption-attachment-316083\" class=\"wp-caption-text\">SpaceX\u2019s satellite plan suggests that Starlink spacecraft would be placed in two different sets of orbits, with an intial wave of satellites at an altitude of 550 kilometers. (PatentYogi via YouTube)<\/figcaption><\/figure>\n<p>SpaceX wants to lower the bar for its first batch of Starlink broadband satellites, with the aim of beginning deployment by the end of 2019.<\/p>\n<p>The revised plan is laid out for regulators at the Federal Communications Commission in filings that seek a lower orbit for 1,584 of the more than 4,400 satellites it envisions launching. The new target orbit would be 550 kilometers (342 miles) in altitude, as opposed to the 1,150-kilometer (715-mile) orbit described in SpaceX\u2019s initial round of filings.<\/p>\n<p>The FCC signed off on SpaceX\u2019s original plan in March, and would have to approve the revisions after putting them through a public comment period.<\/p>\n<p>In its filings, SpaceX said it was changing the plan based on its experience with Tintin A and B, the two prototype satellites it put into orbit in February.<\/p>\n<p>Those spacecraft, which were built at SpaceX\u2019s satellite development facility in Redmond, Wash., have been undergoing testing for months. Some observers wondered why the Tintin satellites weren\u2019t sent into a higher orbit as planned&nbsp;\u2014 and the revised constellation plan could provide an explanation.<\/p>\n<p>\u201cThis move will help simplify the spacecraft design and enhance the considerable space safety attributes of SpaceX\u2019s constellation by ensuring that any orbital debris will undergo rapid atmospheric re-entry and demise, even in the unlikely event that a spacecraft fails in orbit,\u201d SpaceX said in the documents filed today.<\/p>\n<p><iframe title=\"Is There Space for 12,000 More Satellites Up There?\" src=\"https:\/\/www.youtube.com\/embed\/BMoH_zr2y8A?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen=\"\" data-ratio=\"0.5625\" data-width=\"800\" data-height=\"450\" style=\"display: block; margin: 0px; width: 800px; height: 450px;\"><\/iframe><\/p>\n<p>SpaceX said the plan for a lower orbit means 16 fewer satellites will be required&nbsp;\u2014 and will also reduce the potential for a traffic jam at the higher orbit, which is close to the altitude targeted by rival broadband constellations being considered by OneWeb, Boeing and Telesat.<\/p>\n<p>Starlink will require thousands of satellites because each satellite spends only a few minutes in contact with a given ground station as it passes over. But once enough satellites are in orbit, the constellation should provide global coverage, theoretically making low-cost broadband internet access available to billions of people who don\u2019t have it today.<\/p>\n<p>Having the satellite in low Earth orbit as opposed to a much higher geostationary orbit reduces the lag time, or latency, for data transmissions. In May, SpaceX CEO Elon Musk said the response time for the Tintin satellites was \u201cpretty good,\u201d with latency amounting to 25 milliseconds. \u201cGood enough to play fast-response video games,\u201d he tweeted.<\/p>\n<p>When the low-orbit constellation is fully deployed, latency could be reduced to as little as 15 milliseconds, \u201cat which point it would be virtually unnoticeable to almost all users,\u201d SpaceX said in today\u2019s filing.<\/p>\n<p>SpaceX acknowledged that going lower will present some challenges. At least at first, the satellites will have to widen their transmission angles so that ground stations can be in communication when the satellites are just 25 degrees above the horizon, as opposed to 40 degrees under the original plan.<\/p>\n<p>Also, SpaceX has to convince the FCC that the revised plan would create no more interference for ground-based networks and geosynchronous satellite networks than the original plan would have. The company presented pages of graphs showing that would be the case.<\/p>\n<h4 class=\"callout clearfix\"><strong>Read SpaceX\u2019s key FCC filings:<\/strong> Legal narrative&nbsp;and&nbsp;technical information<\/h4>\n<p>SpaceX clearly wants the FCC to expedite approval of the revisions: When the agency gave its original approval, it said the thumbs-up was contingent on favorable findings from the International Telecommunications Union, the global authority on telecom satellite orbits. But in today\u2019s filings, SpaceX said it wasn\u2019t optimistic about getting the ITU\u2019s go-ahead on a timely schedule. It offered orbital data based on ITU simulations as a substitute, in hopes of getting a waiver of the FCC\u2019s original requirement.<\/p>\n<p>The FCC is due to consider a different aspect of SpaceX\u2019s satellite plan next week, during a time frame that&nbsp;FCC Chairman Ajit Pai has set aside as \u201cSpace Month.\u201d<\/p>\n<p>SpaceX said it was planning to beat the deadlines laid out by the FCC in its original approval. \u201cSpaceX intends to launch its first batch of satellites to begin populating a new orbital shell before the end of 2019,\u201d it said. At least half of the 4,400-plus satellites are required to be in operation by March 29, 2024.<\/p>\n<p>In today\u2019s filings, SpaceX gave a shout-out to its Redmond operation, which recently underwent a reorganization to accelerate the pace of satellite development. \u201cSpaceX was able to move from opening its satellite technology development office in Redmond, Washington, to building, launching and operating its own spacecraft in orbit in an unprecedented three and a half years,\u201d the company said.<\/p>\n<p><strong>In other SpaceX news:<\/strong><\/p>\n<ul>\n<li style=\"font-weight: 400;\">NASA\u2019s&nbsp;Launch&nbsp;Services Program&nbsp;has certified SpaceX\u2019s Falcon 9 rocket as a Category 3&nbsp;launch&nbsp;vehicle. Such vehicles are certified to support NASA\u2019s highest cost and most complex scientific missions. \u201cLSP Category 3 certification is a major achievement for the Falcon 9 team and represents another key milestone in our close partnership with NASA,\u201d SpaceX President Gwynne Shotwell said in a statement. \u201cWe are honored to have the opportunity to provide cost-effective and reliable&nbsp;launch&nbsp;services to the country\u2019s most critical scientific payloads.\u201d<\/li>\n<li>In a series of tweets, Elon Musk said SpaceX would design a Falcon 9 upper stage to serve as a scaled-down testbed for the massive BFR spaceship that\u2019s meant to take on missions to the moon and Mars within the next decade. The \u201cmini-BFR Ship\u201d would test the ultra-light heat shield and supersonic control surfaces that would be required for atmospheric re-entry of the full-scale spaceship. \u201cAiming for orbital flight by June,\u201d Musk said. The re-entry tests would be conducted in parallel with BFR landing tests on the Texas Gulf Coast.<\/li>\n<li>Reuters is quoting two unnamed sources as saying that SpaceX has circulated pricing information on a proposed $750 million term loan that will put cash on the company\u2019s balance sheet.&nbsp;Bank of America Merrill Lynch is leading the deal, and commitments are due Nov. 16, Reuters reported. Bloomberg News reported that Goldman Sachs pulled out of an earlier arrangement for a $500 million loan when SpaceX sought wide latitude to raise additional debt. (<strong>Update for 5:50 p.m. PT Nov. 25:<\/strong> In the end, SpaceX settled on a $250 million loan facilitated by Bank of America.)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>SpaceX\u2019s satellite plan suggests that Starlink spacecraft would be placed in two different sets of orbits, with an intial wave of satellites at an altitude of 550 kilometers. (PatentYogi via YouTube) SpaceX wants to lower the bar for its first batch of Starlink broadband satellites, with the aim of beginning deployment by the end of [&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":[252,277,20,316,440],"class_list":["post-18279","post","type-post","status-publish","format-standard","hentry","category-news","tag-broadband","tag-fcc","tag-satellite","tag-spacex","tag-starlink"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/18279"}],"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=18279"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/18279\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=18279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=18279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=18279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}