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Gravity Recovery and Interior Laboratory

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Space Shuttle Grail (disambiguation) The Gravity Recovery and Interior Laboratory (GRAIL) was an American lunar science mission in NASA's Discovery Program which used high-quality gravitational field mapping of the Moon to determine its interior structure. The two small spacecraft GRAIL A (Ebb) and GRAIL B (Flow) were launched on 10 September 2011 aboard a single launch vehicle: the most-powerful configuration of a Delta II, the 7920H-10. GRAIL A separated from the rocket about nine minutes after launch, GRAIL B followed about eight minutes later. They arrived at their orbits around the Moon 25 hours apart. The first probe entered orbit on 31 December 2011 and the second followed on 1 January 2012. The two spacecraft impacted the Lunar surface on December 17, 2012.

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2011-09-10 2011-09-08

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rocket propulsion high level winds

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NASAJPL

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2011-09-09 2011-09-10 2011-09-08

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Gravity Recovery and Interior Laboratory

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Ancient rift valleys – context. Ancient rift valleys – closeup . GRAIL's final resting spot. LRO flies over the north pole of the Moon, where it has a very good view of the GRAIL impact. The second part of this video is the view from LRO through LAMP's slit, showing the impact and the resulting plume. Ancient rift valleys – rectangular structure . This animation shows the last three orbits of the spacecraft, with views of the impact site. The impact occurs on the night side of a waxing crescent Moon, so the view shifts from a natural color Moon to a false-color elevation map. Artist's interpretation of the GRAIL tandem spacecraft above the lunar surface Ebb and Flow's final moments.

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Moon – Oceanus Procellarum

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abandoned Success scrubbed

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PIA18822-LunarGrailMission-OceanusProcellarum-Rifts-Overall-20141001.jpg Ebb and Flow's Final Moments.jpg 14 GRAIL's Final Resting Spot.jpg PIA18821-LunarGrailMission-OceanusProcellarum-Rifts-Closeup-20141001.jpg GRAIL Impacts the Moon.ogv LAMP Observes GRAIL Impact.ogg

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A weather balloon was released minutes before the decision point to take the latest readings of upper level winds and Air Force weather reconnaissance aircraft were aloft beginning at 7 am. Range was reconfigured for omni antennae instead of tracked ones to support 99 degree azimuth. An issue with the rocket's propulsion system was detected while the Delta 2 rocket was drained of fuel.

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Delta II 7920H-10 configuration

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2011-12-31

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n25: Massachusetts Institute of Technology

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Space Shuttle Grail (disambiguation) The Gravity Recovery and Interior Laboratory (GRAIL) was an American lunar science mission in NASA's Discovery Program which used high-quality gravitational field mapping of the Moon to determine its interior structure. The two small spacecraft GRAIL A (Ebb) and GRAIL B (Flow) were launched on 10 September 2011 aboard a single launch vehicle: the most-powerful configuration of a Delta II, the 7920H-10. GRAIL A separated from the rocket about nine minutes after launch, GRAIL B followed about eight minutes later. They arrived at their orbits around the Moon 25 hours apart. The first probe entered orbit on 31 December 2011 and the second followed on 1 January 2012. The two spacecraft impacted the Lunar surface on December 17, 2012.