Colaprete, Anthony - Initial Results from the LADEE Ultraviolet-Visible Spectrometer

The Lunar Atmosphere and Dust Environment Explorer (LADEE) Ultraviolet Visible Spectrometer (UVS) began commissioning activities in orbit around the moon on October 16, 2013.  Science observations began October 23, 2013 and continued until minutes prior to the planned disposal of the LADEE SC on April 18, 2014 (UTC).  Over the course of the mission the UVS instrument made a series of systematic observations, including lunar limb stares at both terminators and about local noon, targeted activities, including anti-sun sodium tail observations, north/south limb stares, solar occultations, and instrument calibrations.  Initial analysis of these observations have resulted in temporal and spatial mapping of key exosphere species, such as sodium and potassium, and the detection of several other species, for example oxygen, titanium and magnesium.   UVS finds that sodium abundance varies with lunar phase, the moons position with respect to Earth’s magnetotail and with meteoroid showers.   Observations in search of dust, including limb and occultation activities, have provided high signal-to-noise spectra which show variations in extinction and scatter.   This talk will summarize initial results from the UVS instrument.