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Delivering twins
2014-12-09 06:29:17
Posted: October 21, 2004T-00:00LiftoffThe Delta 2 rocket's main engine and twin vernier steering thrusters are started moments before launch. The six ground-start strap-on solid rocket motors are ignited at T-0 to begin the mission.T+01:03.1Ground SRM BurnoutThe six ground-start Alliant TechSystems-built solid rocket motors consume all their propellant and burn out.T+01:05.5Air-Lit SRM IgnitionThe three remaining solid rocket motors strapped to the Delta 2 rocket's first stage are ignited.T+01:06.0Jettison Ground SRMsThe six spent ground-started solid rocket boosters are jettisoned in sets of three to fall into the Atlantic Ocean.T+02:11.5Jettison Air-Lit SRMsHaving burned out, the three spent air-started solid rocket boosters are jettisoned toward the Atlantic Ocean.T+04:23.4Main Engine CutoffAfter consuming its RP-1 fuel and liquid oxygen, the Rocketdyne RS-27A first stage main engine is shut down. The vernier engines cut off moments later.T+04:31.4Stage SeparationThe Delta rocket's first stage is separated now, having completed its job. The spent stage will fall into the Atlantic Ocean.T+04:36.9Second Stage IgnitionWith the stage jettisoned, the rocket's second stage takes over. The Aerojet AJ118-K liquid-fueled engine ignites for the first of two firings needed to place the upper stage and GPS 2R-13 satellite into the proper orbit.T+04:58.0Jettison Payload FairingThe 9.5-foot diameter payload fairing that protected the GPS 2R-13 satellite atop the Delta 2 during the atmospheric ascent is jettisoned is two halves.T+10:53.9Second Stage Cutoff 1The second stage engine shuts down to complete its first firing of the launch. The rocket and attached GPS 2R-13 *****ecraft are now in a coast period before the second stage reignites. The orbit achieved should be 212 miles at apogee, 94 miles at perigee and inclined 36.90 degrees.T+19:55.5Second Stage RestartDelta's second stage engine reignites for a short firing to raise the orbit further.T+20:31.0Second Stage Cutoff 2The second stage shuts down after a 36-second burst. The orbit achieved should be 686 miles at apogee, 103 miles at perigee and inclined 37.21 degrees. Over the next minute, tiny thrusters on the side of the rocket will be fired to spin up the vehicle in preparation for stage separation.T+21:24.0Stage SeparationThe liquid-fueled second stage is jettisoned from the rest of the Delta 2 rocket.T+22:01.0Third Stage IgnitionThe Thiokol Star 48B solid-fueled third stage is then ignited to deliver the GPS 2R-13 satellite into its intended orbit around Earth.T+23:27.7Third Stage BurnoutHaving used up all its solid-propellant, the third stage burns out to completed the powered phase of the launch sequence for GPS 2R-12.T+25:21.0GPS 2R-13 SeparationThe U.S. Air Force's NAVSTAR Global Positioning System Block 2R-13 *****ecraft is released into *****e. The Delta should have placed the satellite into a transfer orbit with a high point of 10,998 nautical miles and low point of 101 nautical miles inclined 39.0 degrees. The satellite will circularize its orbit and raise inclination to 55 degrees for joining the GPS constellation.Data source: Boeing.An insider's view of how Apollo flight controllers operated and just what they faced when events were crucial. Choose your store: John Glenn Mission PatchFree shipping to U.S. addresses!The historic first orbital flight by an American is marked by this commemorative patch for John Glenn and Friendship 7.Final Shuttle Mission PatchFree shipping to U.S. addresses!The crew emblem for the final *****e shuttle mission is available in our store. Get this piece of history!Celebrate the shuttle programFree shipping to U.S. addresses!This special commemorative patch marks the retirement of NASA's Space Shuttle Program. Available in our store!Anniversary Shuttle PatchFree shipping to U.S. addresses!This embroidered patch commemorates the 30th anniversary of the Space Shuttle Program. The design features the *****e shuttle Columbia's historic maiden flight of April 12, 1981.Mercury anniversaryFree shipping to U.S. addresses!Celebrate the 50th anniversary of Alan Shephard's historic Mercury mission with this collectors' item, the official commemorative embroidered patch.Fallen Heroes Patch CollectionThe official patches from Apollo 1, the shuttle Challenger and Columbia crews are available in the store.Apollo CollageThis beautiful one piece set features the Apollo program emblem surrounded by the individual mission logos. | | | | 2014 Spaceflight Now Inc.GPS 2R-15 launch timelineSPACEFLIGHT NOW Air Max 2011
2014-10-06 01:47:14


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