ladee mission overview

The most logical explanation is that individual high-energy photons of sunlight strike the dust particles and knock off a few electrons, leaving a positive charge on the dust. Because of this large peak wavelength shift, temperature stabilization in the FBG's is required. The bottom model shows BOC (Break-Off Cap), ELEC (Electronics box), S (Ion Source Region), Q (Quadrruple Region), D (Detector), RF (Radio Frequency). 28). [26] While concern was expressed that this could disrupt LADEE's mission,[26] such as its baseline readings of the Moon's exosphere, it instead provided additional science value since both the quantity and composition of the spacecraft's propulsion system exhaust were known. Rush, Bernard L. Edwards, "International Interoperability Standards Development for Space Optical Communication," Proceedings of ICSOS 2014 (International Conference on Space Optical Systems and Applications), Kobe, Japan, May 7-9, 2014, 31) "Laser-powered farewell to Moon Mission," ESA, April 25, 2014, URL: http://www.esa.int/Our_Activities/Operations/Laser-powered_farewell_to_Moon_mission, 32) Rick Elphic, "LADEE Project Scientist Update: The Legacy Lives On!," NASA/ARC, April 22, 2014, URL: http://www.nasa.gov/ames/ladee-project-scientist-update-the-legacy-lives-on/#.U1n9JKKegkA, 33) Bob King, "LADEE Sees Zodiacal Light before Crashing into Moon, but Apollo Mystery Remains," Universe Today, April 24, 2014, URL: http://www.universetoday.com/111482/ladee-sees-zodiacal-light-before-crashing-into-moon-but-apollo-mystery-remains/, 34) Rachel Hoover, Dwayne Brown, Dewayne Washington, "NASA Completes LADEE Mission with Planned Impact on Moon's Surface," NASA, April 18, 2014, URL: http://www.nasa.gov/ames/nasa-completes-ladee-mission-with-planned-impact-on-moons-surface/#.U1HYhaKegkA, 35) Ken Kremer, "NASA's Highly Productive LADEE Dust Explorer Probe Crashes into the Moon as Planned," Universe Today, April 18, 2014, URL: http://www.universetoday.com/111013/nasas-highly-productive-ladee-dust-explorer-probe-crashes-into-the-moon-as-planned/, 36) Dwayne Brown, Rachel Hoover, "NASA Satellite to Continue Gathering Data Up to Planned Lunar Impact," NASA Release 14-098, April 3, 2014, URL: http://www.nasa.gov/press/2014/april/nasa-satellite-to-continue-gathering-data-up-to-planned-lunar-impact/#.Uz4VCaKegkA, 37) Rachel Hoover, "LADEE Sends Its First Images of the Moon Back to Earth," NASA/ARC, Feb. 13, 2014, URL: http://www.nasa.gov/ames/ladee-sends-its-first-images-of-the-moon-back-to-earth/#.Uv8Z4_vnNeO, 38) Rachel Hoover, "NASA Extends Moon Exploring Satellite Mission," NASA, Jan. 31, 2014, URL: http://www.nasa.gov/ames/nasa-extends-moon-exploring-satellite-mission/#.Uu8oo_vnNeM, 39) Nancy Neal-Jones, "NASA's LRO Snaps a Picture of NASA's LADEE Spacecraft," Jan. 29, 2014, URL: http://www.nasa.gov/content/goddard/nasas-lro-snaps-a-picture-of-nasas-ladee-spacecraft/#.Uu8nyPvnNeN, 40) Rick Elphic, "LADEE Project Scientist Update: Milestones, Maneuvers and Moisture?," NASA, Jan. 31, 2014, URL: http://www.nasa.gov/ames/ladee-project-scientist-update-milestones-maneuvers-and-moisture/#.Uu8iHfvnNeM, 41) Dewayne Washington, "Laser Demonstration Reveals Bright Future for Space Communication," NASA/GSFC, URL: http://esc.gsfc.nasa.gov/267/278/279/490.html, 42) Rick Elphic, "LADEE Project Scientist Update: Science Observations Begin," NASA, Dec. 11, 2013, URL: http://www.nasa.gov/content/ames/ladee-project-scientist-update-science-observations-begin/#.UqnHKCeFf_o, 43) "LADEE Project Manager Update: Commissioning Complete," NASA News, Nov. 22, 2013, URL: http://www.nasa.gov/content/ladee-project-manager-update-commissioning-complete/#.UqFilSeFf_o, 44) Rachel Hoover, Dwayne Brown, "NASA Spacecraft Begins Collecting Lunar Atmosphere Data," NASA news release 13-79AR, Nov. 21, 2013, URL: http://www.nasa.gov/content/nasa-spacecraft-begins-collecting-lunar-atmosphere-data/#.Uo7r7yfgy9w, 45) "Moon mission beams laser data to ESA station," ESA, Nov. 1, 2013, URL: http://www.esa.int/Our_Activities/Operations/Moon_mission_beams_laser_data_to_ESA_station, 46) Dewayne Washington, "Historic Demonstration Proves Laser Communication Possible," NASA, Oct. 28, 2013, URL: http://www.nasa.gov/content/goddard/historic-demonstration-proves-laser-communication-possible/#.Unc1RlPgy9w, 47) Joshua Buck, Dewayne Washington, "NASA Laser Communication System Sets Record with Data Transmissions to and from Moon," NASA, Release 13-309, Oct. 22, 2013, URL: http://www.nasa.gov/press/2013/october/nasa-laser-communication-system-sets-record-with-data-transmissions-to-and-from/#.UmdTWFOzLWI, 48) "NASA Laser Communication System Sets Record with Data Transmissions to and from Moon," Space Daily, Oct. 24, 2013, URL: http://www.spacedaily.com/reports/NASA_Laser_Communication_System_Sets

The RF subsystem amplifies and downconverts the uplink signal to a medium frequency intermediate frequency (IF), which is subsampled by the ADC (Analog Digital Converter). [14] The LADEE mission cost approximately $280 million, which included spacecraft development and science instruments, launch services, mission operations, science processing and relay support. Figure 41: Schematic layout of the LLGT functions (image credit: MIT, NASA). Ground controllers at NASA/ARC (Ames Research Center) in Moffett Field, CA, are maneuvering the spacecraft to fly approximately 2 -3 km above the lunar surface to gather science measurements at the lowest altitude possible. Initial experiments with entangled photons were performed in 2007, but teleportation of quantum states could only be achieved in 2012 by improving the performance of the setup. The receiver collection optics consist of four 40 cm ∅ telescopes mounted to a gimbal and aligned to a common boresight; the use of multiple telescopes provides spatial diversity to reduce the severity of atmospheric-induced fades; the use of a common, fixed bore-sight eliminates the need for dynamic, orientation-dependent deskew and synchronization procedures to time align signals across the telescope array. The following intense period starting on Dec. 12, 2013 coincides with the Geminids shower and the landing of Chang'e-3.

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