基于LRO Diviner数据的月球虹湾地区表面亮温时空分布

发布时间：2018-01-22 21:18

本文关键词： 热红外亮温时空分布虹湾 Diviner　出处：《红外与毫米波学报》2017年05期 　论文类型：期刊论文

【摘要】：Diviner在7年多的运行时间内,共获得了超过3.3×1011个辐射亮度测量值.这些数据除了具有的推扫性、条带性和少量的"坏点线"与"故障"等特征外,在一个月球日内呈现白天正午前后和整个夜晚亮温值变化幅度相对均匀,上下午尤其是日出和日落前后亮温值变化剧烈的规律.利用昼夜分段亮温拟合模型,结合数值模拟、奇异值剔除、分段拟合和纬向校正等方法获得了虹湾地区6个时刻的高分辨率和高覆盖度的亮温分布.结果表明,白天的亮温与太阳辐射通量值计算的温度值相接近,敏感于地形起伏、物质混合和通道光度计特性等因素,最高和最低亮温分别出现在朝向赤道方向的山坡和落差最大的撞击坑中心位置;夜晚的亮温敏感于视场内物质的热物理属性差异,变化幅度由上半夜的相对剧烈逐渐过渡到下半夜的趋于均匀.文章揭示了月表热能量交换规律,解释了复杂和异常月表热红外环境的本质,提供了一个关于无大气星体的风化层如何存储热红外辐射能量以及与空间环境进行能量交换的新视角.
[Abstract]:In more than 7 years, Diviner has obtained more than 3.3 脳 1011 radiance measurements. Besides the characteristics of stripe and a small number of "bad point lines" and "faults", the range of brightness temperature changes in a lunar day is relatively uniform before and after noon during the day and the whole night. In the morning and afternoon, especially before and after sunrise and sunset, the rule of sharp change of the brightness temperature is obtained. By using the day and night section bright temperature fitting model, combining with the numerical simulation, the singular value is eliminated. The high-resolution and high-coverage bright temperature distributions at 6 times in Hongwan area are obtained by piecewise fitting and zonal correction. The results show that the daytime brightness temperature is close to that calculated by solar radiation flux. The highest and lowest brightness temperatures appear on the slope facing the equator and the center of the crater with the largest drop, respectively, which are sensitive to the factors such as topographic fluctuation, material mixing and the characteristics of the channel photometer. The light temperature of the night is sensitive to the difference of the thermal physical properties of matter in the field of view, and the range of variation is gradually from the first half of the night to the second half of the night. This paper reveals the law of thermal energy exchange on the surface of the moon. This paper explains the nature of complex and abnormal lunar surface thermal infrared environment and provides a new perspective on how the weathering layer of a non-atmospheric star stores thermal infrared radiation energy and exchanges energy with space environment.
【作者单位】：吉林大学地球探测科学与技术学院;吉林建筑大学测绘与勘查工程学院;
【基金】：国家自然科学基金项目(41372337,3A415AK44423,41772346) 科技基础专项项目(2015FY210500) 863计划(2015AA123704)~~
【分类号】：P184.53
【正文快照】： 到Diviner数据的时间和空间分布规律,只是将特定引言时间段的亮温数据简单叠加获得了低覆盖度的月表Diviner是月球勘测轨道飞行器LRO(The Lunar热分布;另一部分学者的月表热分布空间分辨率相Reconnaissance Orbiter)七个有效载荷之一[1]已经对对较低,只有2×2像素/度,无法对月

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