Overview of the LADEE Ultraviolet-Visible Spectrometer: Design, Operations, and Initial Results
Overview of the LADEE Ultraviolet-Visible Spectrometer: Design, Operations, and Initial Results
复制标题
DOI：
--
复制
发表时间：
2014-03
期刊：
影响因子：
--
通讯作者：
A. Colaprete;R. Elphic;D. Landis;J. Karcz;M. Shirley;K. Kargo;D. Wooden;B. Hermalyn
中科院分区：
文献类型：
--
作者：
A. Colaprete;R. Elphic;D. Landis;J. Karcz;M. Shirley;K. Kargo;D. Wooden;B. Hermalyn
简介：月球大气和尘埃环境探测器（LADEE）是一项轨道月球科学使命，旨在实现2003年国家研究理事会十年调查、月球探测分析小组路线图和“月球探测的科学背景”（SCEM）报告的目标，并已被2011年行星任务十年调查建议执行。LADEE使命的目标是确定月球大气的组成，并调查控制其分布和变化的过程，包括源，汇和表面相互作用。它将监测已知气体的变化，如钠，钾，氩和氦，并将寻找其他尚未发现的月球和月球外起源的气体。LADEE还将确定月球外逸层中是否存在尘埃，并揭示导致其来源和变化的过程。LADEE于2013年9月6日发射，并于2013年10月6日进入月球轨道。紫外-可见光谱仪（UVS）：LADEE上的三个科学仪器之一，紫外和可见光谱仪（UVS）旨在对月球外逸层进行观测并寻找尘埃（图1）。UVS由一个CCD摄谱仪和两个前置光学系统组成：一个3英寸望远镜和一个太阳观测光学系统。两个前置光学器件都通过光纤馈送到光谱仪。UVS于10月17日部署了它的边缘观测望远镜门，并开始了一系列调试活动，包括指向，波长和初步辐射校准。UVS于2013年10月23日进行了第一次月球边缘观测。紫外线观测仪一直在定期监测两种先前测量的大气物种，钾和钠，并一直在进行观测，以寻找其他先前应该的物种，包括OH，H2O，Si，Al，Mg，Ca，Ti和Fe。UVS还能够利用其临边望远镜探测从几公里到50公里高度之间的尘埃散射光，并利用太阳掩星测量搜索非常接近地表的尘埃。UVS仪器在230 - 810 nm之间工作，单次扫描的光谱分辨率为500）。钠和钾在所有活动中定期测量，除了掩星。这些测量的趋势在空间上和时间上都有，并与特定的事件，如流星流和表面成分的关联进行了检查。
Introduction: The Lunar Atmosphere and Dust Environment Explorer (LADEE) is an orbital lunar science mission designed to address the goals of the 2003 National Research Council decadal survey, the Lunar Exploration Analysis Group Roadmap, and the “Scientific Context for Exploration of the Moon” (SCEM) report, and has been recommended for execution by the 2011 Planetary Missions Decadal Survey. The LADEE mission goal is to determine the composition of the lunar atmosphere and investigate the processes that control its distribution and variability, including sources, sinks, and surface interactions. It will monitor variations in known gasses, such as sodium, potassium, argon and helium, and will search for other, as-yet-undetected gasses of both lunar and extra-lunar origin. LADEE will also determine whether dust is present in the lunar exosphere, and reveal the processes that contribute to its sources and variability. LADEE launched September 6, 2013 and entered lunar orbit on October 6, 2013. The Ultraviolet-Visible Spectrometer (UVS): One of three science instruments on LADEE, the Ultraviolet and Visible Spectrometer (UVS) is designed to make observations of the lunar exosphere and search for dust (Figure 1). UVS consists of a CCD spectrograph and two fore-optics: a three-inch telescope and a solar viewing optic. Both fore-optics are fed to the spectrometers via optical fibers. UVS deployed its limb-viewing telescope door on October 17 and began a series commissioning activities, including pointing, wavelength and preliminary radiometric calibrations. UVS made its first lunar limb observations on October 23, 2013. UVS has been routinely monitoring two previously measured atmospheric species, potassium and sodium, and has been making observations to search for other, previouslysought species including OH, H2O, Si, Al, Mg, Ca, Ti, and Fe. UVS is also able to detect the scattered light from lofted dust between the altitudes of a few km up to 50 km using its limb telescope, as well as search for dust very near the surface using solar occultation measurements. The UVS instrument operates between 230 – 810 nm with a spectral resolution of 500 for a single scan). Sodium and potassium are regularly measured in all activities, except for occultations. Trends in these measurements are made both spatially and temporally, and associations are with specific events, such as meteor streams, and surface composition are examined.