J4 ›› 2010, Vol. 40 ›› Issue (3): 721-725.

• 地球探测与信息技术 • 上一篇    下一篇

基于嫦娥一号卫星激光高度计数据的月表有效反射率

孟治国|陈圣波|崔腾飞|连懿   

  1. 吉林大学 地球探测科学与技术学院|长春 130026
  • 收稿日期:2009-09-03 出版日期:2010-05-26 发布日期:2010-05-26
  • 通讯作者: 陈圣波(1967-), 男, 河南信阳人,教授,博士生导师,主要从事定量遥感反演研究 E-mail:chensb@email.jlu.edu.cn
  • 作者简介:孟治国(1978-),男, 河南汝州人,讲师,博士,主要从事致密介质被动微波辐射传输模拟反演研究|E-mail: mengzg@jlu.edu.cn
  • 基金资助:

    国家自然科学基金项目(40971187);青年基金项目(40901159);高等学校博士学科点专项科研基金项目(20090061120055);吉林大学基本科研业务费项目(20090304)

Effective Reflectivity of the Lunar Surface Based
on the Laser Altimeter Data from the Chang’E-1 Orbiter

 MENG Zhi-guo, CHEN Sheng-bo, CUI Teng-fei, LIAN Yi   

  1. College of GeoExploration Science and Technology, Jilin University, Changchun, 130026, China
  • Received:2009-09-03 Online:2010-05-26 Published:2010-05-26

摘要:

月壤厚度反演是我国月球探测的重要科学目标之一,其重要影响因素之一就是月球表面的有效反射率。前人在月壤厚度反演研究中使用了光滑月表反射率模型,使得月表水平极化反射率和水平极化反射率分别为0.063和0.028(观测角:30°)。然而,月球表面是非常粗糙的,必须建立适合粗糙月球表面的有效反射率模型。因此,以嫦娥一号卫星微波辐射计数据的空间分辨率(3 GHz通道,56 km×56 km)为标准,利用每个微波辐射计像元范围内的激光高度计数据(8×8个)建立相应的粗糙月表模型。然后,基于Q/H模型,进行月球表面的有效反射率研究,生成了观测角为30°时月球表面水平极化有效反射率和垂直极化有效反射率分布图。结果表明,月球表面的粗糙性对月表反射率影响很大,使得水平极化反射率降低,局部地区降至0.050;垂直极化反射率增加,局部地区可达0.040,增幅达40%。

关键词: 嫦娥一号卫星, 激光高度计数据, 粗糙表面, 有效反射率, Q/H模型

Abstract:

The retrieval of the lunar regolith thickness is one of the important missions of our lunar exploration. To get the lunar regolith thickness, the surface effective reflectivity is one of the essentially influential factors. In the previous regolith thickness study, the smooth surface reflectivity model is employed and the calculated horizontal and vertical reflectivity is 0.063 and 0028, respectively, for the whole moon surface on the condition that the view angle is 30°. However, the moon surface is rather rough, and the proper reflectivity model is constructed essentially for the rough surface. Therefore,according to the spatial resolution of the microwave radiometer data (56 km×56 km in 3 GHz channel) onboard the ChangE-1 lunar satellite, the surface roughness model is constructed with the corresponding laser altimeter data(total number, 8×8). Then the effective reflectivity of the lunar surface is calculated based on the Q/H model. The distributions of vertical and horizontal effective reflectivity for rough lunar surface are also presented assumed that the view angle is 30°. The results indicate that the lunar surface roughness has great influence on its effective reflectivity. The surface roughness greatly decreases the horizontal polarized reflectivity, in some place down to 0.050, and increases the vertical polarized one, in some place up to 0.040.

Key words: ChangE-1 lunar orbiter, laser altimeter data, rough surface, effective reflectivity, Q/H model

中图分类号: 

  • TP75
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