United Launch Atlas 5 로켓은 케이프 커 내버 럴 (Cape Canaveral)에서 미국 공군의 4 번째 고급 고주파 통신 위성을 발사 할 예정이다. 이 타임 라인은 최적화 된 정지 궤도 궤도로 3 시간 30 분 비행 할 때 계획된 주요 사명 사건을 보여줍니다. RD-180 주 엔진과 5 개의 고체 로켓 부스터에 의해 추진 된 197 피트 높이 (60 미터) 로켓은 수요일 오전 2시 15 분 (동부 표준시 0415 GMT)에 개장하는 2 시간 발사 창에서 이륙하도록 설정됩니다. ). AEHF 4 임무는 Atlas 5 로켓의 79 번째 비행과 2018 년의 다섯 번째 Atlas 5 발사가 될 것입니다. 록히드 마틴 (Lockheed Martin)에 의해 건설 된 AEHF 4 위성은 2010 년, 2012 년 및 2013 년에 아틀라스 5 로켓에서 발사 된 AEHF 별자리에서 3 개의 이전 위성을 조종합니다. 궤도에있는 4 개의 AEHF 위성으로 공군의 새로운 세대의 안전하고 핵 강화 된 음성, 비디오 데이터 중계 우주선은 전 지구 적 범위를 제공 할 것입니다. Atlas 5 / AEHF 4 발사 절차의 개요와 이륙 후 로켓의 경로를 보여주는 지상 궤적이 아래와 같이 게시됩니다.
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Credit: United Launch Alliance T+0:00:01.1: Liftoff
<img class="size-full wp-image-31649" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_1.jpg" alt="" width="678" height="378" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_1.jpg 678w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_1-300x167.jpg 300w" sizes="(max-width: 678px) 100vw, 678px" /> After igniting its RD-180 main engine at T-minus 2.7 seconds, the Atlas 5 rocket fires its five solid rocket boosters and rises away from Complex 41 at Cape Canaveral Air Force Station, Florida, with approximately 2.6 million pounds of thrust. T+0:00:34.6: Mach 1
<img class="size-full wp-image-31650" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_2.jpg" alt="" width="678" height="378" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_2.jpg 678w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_2-300x167.jpg 300w" sizes="(max-width: 678px) 100vw, 678px" /> The Atlas 5 rocket exceeds the speed of sound, flying east from Cape Canaveral Air Force Station. T+0:00:48.4: Max-Q
<img class="size-full wp-image-31651" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_3.jpg" alt="" width="678" height="315" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_3.jpg 678w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_3-300x139.jpg 300w" sizes="(max-width: 678px) 100vw, 678px" /> The Atlas 5 rocket passes through the region of maximum dynamic pressure during ascent through the lower atmosphere. T+0:01:50.7: Jettison SRBs
<img class="size-full wp-image-31652" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_4.jpg" alt="" width="678" height="379" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_4.jpg 678w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/04/a5_timeline_4-300x168.jpg 300w" sizes="(max-width: 678px) 100vw, 678px" /> Having burned out of propellant approximately 20 seconds earlier, the five spent Aerojet Rocketdyne-built solid rocket boosters are jettisoned once dynamic pressure conditions are satisfied. T+0:03:28.6: Payload Fairing Jettison
<img class="size-full wp-image-34917" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_plfjettison.jpg" alt="" width="800" height="451" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_plfjettison.jpg 800w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_plfjettison-300x169.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_plfjettison-768x433.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_plfjettison-678x381.jpg 678w" sizes="(max-width: 800px) 100vw, 800px" /> The Atlas 5 rocket’s payload fairing, made in Switzerland by Ruag Space, is jettisoned in a clamshell-like fashion once external heating levels drop below predetermined limits after climbing through the dense lower atmosphere. The Forward Load Reactor deck that connected the payload fairing’s structure to the Centaur upper stage is released five seconds after the shroud’s jettison. T+0:04:27.4: Main Engine Cutoff
<img class="size-full wp-image-34918" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_beco.jpg" alt="" width="880" height="491" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_beco.jpg 880w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_beco-300x167.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_beco-768x429.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_beco-678x378.jpg 678w" sizes="(max-width: 880px) 100vw, 880px" /> The RD-180 main engine completes its firing after consuming its kerosene and liquid oxygen fuel supply in the Atlas first stage. T+0:04:33.4: Stage Separation
<img class="size-full wp-image-34919" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_staging.jpg" alt="" width="877" height="495" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_staging.jpg 877w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_staging-300x169.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_staging-768x433.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_staging-678x383.jpg 678w" sizes="(max-width: 877px) 100vw, 877px" /> 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. T+0:04:43.4: Centaur Ignition 1
<img class="size-full wp-image-34920" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes1.jpg" alt="" width="881" height="495" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes1.jpg 881w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes1-300x169.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes1-768x432.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes1-678x381.jpg 678w" sizes="(max-width: 881px) 100vw, 881px" /> The Centaur RL10C-1 engine ignites for the first of three upper stage firings. This burn will inject the Centaur stage and the AEHF 4 satellite into an initial parking orbit. T+0:11:51.3: Centaur Cutoff 1
<img class="size-full wp-image-34921" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco1.jpg" alt="" width="879" height="493" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco1.jpg 879w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco1-300x168.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco1-768x431.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco1-678x381.jpg 678w" sizes="(max-width: 879px) 100vw, 879px" /> The Centaur engine shuts down after arriving in a planned low-Earth parking orbit. The vehicle enters a 10-minute coast period before arriving at the required location in space for the second burn. T+0:22:25.2: Centaur Ignition 2
<img class="size-full wp-image-34922" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes2.jpg" alt="" width="880" height="494" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes2.jpg 880w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes2-300x168.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes2-768x431.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes2-678x381.jpg 678w" sizes="(max-width: 880px) 100vw, 880px" /> Producing 22,900 pounds of thrust, the Centaur re-ignites to accelerate the payload into a highly elliptical transfer orbit from the parking altitude achieved earlier in the launch sequence. This burn lasts nearly six minutes. T+0:28:19.1: Centaur Cutoff 2
<img class="size-full wp-image-34923" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco2.jpg" alt="" width="879" height="493" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco2.jpg 879w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco2-300x168.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco2-768x431.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco2-678x381.jpg 678w" sizes="(max-width: 879px) 100vw, 879px" /> The second Centaur firing places the AEHF 4 satellite into an elliptical transfer orbit stretching more than 20,000 miles above Earth, beginning a three-hour coast period for the mission’s final orbital adjustment maneuver. T+3:28:20.4: Centaur Ignition 3
<img class="size-full wp-image-34924" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes3.jpg" alt="" width="879" height="494" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes3.jpg 879w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes3-300x169.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes3-768x432.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmes3-678x381.jpg 678w" sizes="(max-width: 879px) 100vw, 879px" /> After a three-hour coast, the Centaur’s RL10 engine reignites for a roughly one-minute, 40-second firing to place the AEHF 4 satellite in the proper orbit for spacecraft separation. T+3:30:00.1: Centaur Cutoff 3
<img class="size-full wp-image-34925" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco3.jpg" alt="" width="877" height="492" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco3.jpg 877w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco3-300x168.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco3-768x431.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_centaurmeco3-678x381.jpg 678w" sizes="(max-width: 877px) 100vw, 877px" /> The powered phase of flight is concluded as the Centaur reaches the planned elliptical geostationary transfer orbit with an apogee, or high point, of 21,933 miles (35,299 kilometers), a perigee, or low point, of 5,539 miles (8,914 kilometers), and an inclination of 12.8 degrees. T+3:32:49.1: AEHF 4 Separation
<img class="size-full wp-image-34926" src="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_aehf4separation.jpg" alt="" width="881" height="494" srcset="https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_aehf4separation.jpg 881w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_aehf4separation-300x168.jpg 300w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_aehf4separation-768x431.jpg 768w, https://mk0spaceflightnoa02a.kinstacdn.com/wp-content/uploads/2018/10/av073_aehf4separation-678x381.jpg 678w" sizes="(max-width: 881px) 100vw, 881px" /> The AEHF 4 spacecraft deploys from the Centaur upper stage.
스페이스 클럽(Space Club)