CV LRO mission （LROC introduction）

美國觀測軌道計划，衛星發射與2009年6月28日，是美國重返月球計划的一部分。

空間器攜帶7中傳感器：

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

這里只講第一種 LROC, 它被設計用來解決兩個問題：

 Landing site certification（找到潛在降落點）

• Polar illumination（找到可能的永久照明區或永久陰影區）

除了這兩個首要的目的外，LROC還可以提供6種數據：

• 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組成（a common Sequence and Compressor System (SCS)壓縮），相機參數網站：http://lroc.sese.asu.edu/EPO/LROC/lroc.php?pg=specifications

• 2個窄交鏡頭(narrow angle camera heads, NACs)，提供0.5m級別的相片， 刈幅5Km寬，全色波段影像。
• 1個廣角鏡頭（wide angle camera, WAC）， 100m像素，60Km刈幅，7波段。

LRO任務網頁：http://www.nasa.gov/mission_pages/LRO/overview/index.html

數據瀏覽、下載鏈接：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)