On earlier missions, the Space Shuttle remained in the heads-down orientation to maintain communications with the tracking station in Bermuda, but later missions, beginning with STS-87, rolled to a heads-up orientation at T+6 minutes for communication with the tracking and data relay satellite constellation. Two built-in holds at T−20 minutes Prognozy dla sportu Ekspert Leszno 2024 and T−9 minutes provided scheduled breaks to address any issues and additional preparation. At 6 seconds prior to main engine cutoff (MECO), which occurred at T+8 minutes 30 seconds, the RS-25 engines were throttled down to 67%. The GPCs controlled ET separation and dumped the remaining liquid oxygen and hydrogen to prevent outgassing while in orbit. The ground Launch Processing System handed Prognozy dla sportu Ekspert Leszno 2024 off the control to the orbiter vehicle's GPCs at T−31 seconds. At T−16 Prognozy dla sportu Ekspert Leszno 2024 seconds, the GPCs armed the SRBs, the sound suppression system (SPS) began to drench the MLP and SRB trenches with 1,100,000 L (300,000 U.S. Missions after STS-38 used the RS-25 engines to achieve the optimal apogee, and used the OMS engines to circularize the orbit. The orbital altitude and inclination were mission-dependent, and the Space Shuttle's orbits varied from 220 to 620 km (120 to 335 nmi). Sportu . 2024.
Zakład Dla emerytów 2024
[19] : III–8 After the built-in hold at T−9 minutes, the countdown was automatically controlled by the Ground Launch Sequencer (GLS) at the LCC, which stopped the countdown if it sensed a critical problem with any of the Space Shuttle's onboard systems. [38] At T−3 minutes 45 seconds, the engines began conducting gimbal tests, which were concluded at T−2 minutes 15 seconds. The ground Launch Processing System handed off the control to the orbiter vehicle's GPCs at T−31 seconds. At T−16 seconds, the GPCs armed the SRBs, the sound suppression system (SPS) began to drench the MLP and SRB trenches with 1,100,000 L (300,000 U.S. gal) of water to protect the orbiter vehicle from damage by acoustical energy and rocket exhaust reflected from the flame trench and MLP during lift-off. [39] [40] At T−10 seconds, hydrogen igniters were activated under each engine bell to quell the stagnant gas inside the cones before ignition. gal) of water to protect the orbiter Prognozy dla sportu Ekspert Leszno 2024 vehicle from damage by acoustical energy and rocket exhaust reflected from the flame trench and MLP during lift-off. Szczeliny Dla uczniów.
2024. . . . . . . . Zakład Dla emerytów 2024.Missions after STS-38 used the RS-25 engines to achieve the optimal apogee, and used the OMS engines to circularize the orbit. Prognozy .
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