基于嫦娥一号卫星激光高度计数据的月表有效反射率

发布时间：2019-02-14 09:15

【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(3GHz通道,56km×56km)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%。
[Abstract]:The inversion of lunar soil thickness is one of the important scientific targets of lunar exploration in China, and one of its important factors is the effective reflectivity of the lunar surface. In the retrieval of lunar soil thickness, the smooth lunar surface reflectance model was used, which made the horizontal polarization reflectivity and horizontal polarization reflectivity of the lunar surface 0.063 and 0.028 respectively (observation angle: 30 掳). However, the surface of the moon is very rough, and an effective reflectivity model suitable for the rough surface of the moon must be established. Therefore, based on the spatial resolution (3GHz channel, 56km 脳 56km) of the microwave radiometer data of Chang'e 1 satellite, the corresponding rough lunar table model is established by using the laser altimeter data (8 脳 8) in the range of each microwave radiometer pixel. Then, based on the Q / H model, the effective reflectivity of the lunar surface is studied, and the distributions of the effective reflectivity of horizontal polarization and vertical polarization of the lunar surface are obtained when the observed angle is 30 掳. The results show that the roughness of the lunar surface has a great influence on the reflectivity of the lunar surface, which decreases the horizontal polarization reflectivity to 0.050 in the local area, and increases the vertical polarization reflectivity to 0.040 in the local area.
【作者单位】：吉林大学地球探测科学与技术学院;
【基金】：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)
【分类号】：P184.5

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