CV LRO mission （LROC introduction）

美国观测轨道计划，卫星发射与2009年6月28日，是美国重返月球计划的一部分。

空间器携带7中传感器：

1. Lunar reconnaissance orbiter camera(LROC) 
2. Lunar Orbiter Laser altimeter(LOLA) 
3. Lunar Exploration Neutron Detector(LEND)
4. Diviner Lunar Radiometer Experiment(DLRE) 
5. Lyman-Alpha Mapping Project(LAMP) 
6. Cosmic Ray Telescope for the Effects of Radiation(CRaTER) 
7. Mini-RF

这里只讲第一种 LROC, 它被设计用来解决两个问题：

 Landing site certification（找到潜在降落点）

• Polar illumination（找到可能的永久照明区或永久阴影区）

除了这两个首要的目的外，LROC还可以提供6种数据：

• Meter-scale mapping of regions of permanent or near-permanent illumination of polar massifs
• Multiple coregistered observations of portions of potential landing sites and elsewhere for derivation of high-resolution topography through stereogrammetric and photometric stereo analyses
• A global multispectral data set in 7 wavelengths (300-680 nm) to characterize lunar resources, in particular ilmenite
• A global 100- m/pixel basemap with incidence angles (60-80Á) favorable for morphologic interpretations
• Sub-meter imaging of a variety of geologic units to characterize physical properties and variability of the regolith
• Meter-scale coverage overlapping with Apollo era Panoramic images (1-2 m/pixel) to document the number of small impacts since 1971-1972, to ascertain hazards for future surface operations and interplanetary travel.

LROC组成（a common Sequence and Compressor System (SCS)压缩），相机参数网站：http://lroc.sese.asu.edu/EPO/LROC/lroc.php?pg=specifications

• 2个窄交镜头(narrow angle camera heads, NACs)，提供0.5m级别的相片， 刈幅5Km宽，全色波段影像。
• 1个广角镜头（wide angle camera, WAC）， 100m像素，60Km刈幅，7波段。

LRO任务网页：http://www.nasa.gov/mission_pages/LRO/overview/index.html

数据浏览、下载链接：http://lroc.sese.asu.edu/images/index.php/

LROC  Products: http://ode.rsl.wustl.edu/moon/pagehelp/quickstartguide/index.html?diviner.htm

•  EDR-Experimental Data Record
•  CDR-Calibrated Data Record 
•  BDR-Binned Data Record
•  MDR-Mosaic Data Record (Part of LROC RDR Data)
•  RDR-Reduced Data Record (Diviner  Products)