多源探测数据对月球表面粗糙度的研究

项目名称： 多源探测数据对月球表面粗糙度的研究

项目编号： No.11203002

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 法文哲

作者单位： 北京大学

项目金额： 24万元

中文摘要： 本研究由"嫦娥"1号等多个月球探测计划的激光高度计、CCD立体相机、地基Arecibo雷达、微型合成孔径雷达、雷达探测仪、Apollo月表特写相机等仪器所获取的月球表面多源数据，根据不同仪器的探测原理，计算月球表面高度起伏方差、相关长度、均方根离差、坡度、均方根坡度、有效坡度等粗糙度参数，并构建月表粗糙度分布图。在此基础上，研究粗糙度随水平尺度的变化关系，计算月表粗糙度分形维数Hurst指数，构建其在月表的分布图。进一步，研究粗糙度随月表地形地貌（如月海、月陆、撞击坑）的分布特征，研究月表粗糙度与年龄之间的相关性，研究撞击坑的形状、大小、密度对月表粗糙度的影响，研究月表石块分布对粗糙度的影响。最后，分析月表光学、微波遥感数据与粗糙度之间的相关性，研究月表粗糙度对光学、被动微波遥感、雷达遥感数据的科学解译所带来的影响，特别探讨粗糙度对雷达探测月球两极阴影撞击坑内水冰的存在所带来的新启示。

中文关键词： 数字高程模型；粗糙度；Hurst指数；雷达回波；亮度温度

英文摘要： In this project, multi-source lunar data sets from China's Chang-E 1, NASA's Lunar Reconnaissance Orbiter (LRO), and Japanese Kaguya lunar missions, such as laser altimeter, CCD stereo camera, Earth-based Arecibo radar, miniature synthetic aperture radar (Mini-SAR), lunar radar sounder (LRS), Apollo lunar surface closeup camera (ALSCC) data, are proposed to investigate lunar surface roughness, such as the root mean square height, correlation length, root mean square deviation, slope, root mean square slope and effective slope. Lunar surface roughness parameters at different horizontal scale will be calculated based on the digital elevation model of the Moon. Then, the variation between roughness and horizontal scale will be investigated, and the Hurst exponent map will be deduced for the whole lunar surface. The correlation between lunar surface roughness and morphology (maria, highlands, craters) is going to be investigated based on these data, and especially the correlation between roughness and shape, size, population of craters will be studied. In addition, the relationship between lunar surface roughness and surface age will be analyzed. Moreover, the correlation between lunar surface roughness and optical, passive microwave remote sensing, and radar remote sensing data will be analyzed, and the effect on

英文关键词： digital elevation model；roughness；Hurst exponent；radar echo；brightness temperature