摘要
路面的反射率通常被认为是在不变的很短的时间内的一些定量遥感应用。为了检验其可变性,在半天的时间内采用双光束法测量了可见光和近红外光对混凝土和沥青路面的光谱反射率。调查发现,波长550μm恒定的情况下,沥青混凝土路面的反射率相对变化值达到20.7%和3.52%,结果表明,所有可见光和近红外波段表现的特征与漫辐射的关系具有相似性。文中,这个效果是从数学观点解释的,但目前还需要进一步从物理模型来研究反射率的动态变化。
Road pavement reflectance is usually assumed to be invariant in short periods of time in some quantitative remote sensing applications. To examine its variability, reflectance sequences of concrete and asphalt pavement are measured in field for half a day in visible and near-infarecd（VNIR） spectral range using dual-beam method. As much as 20.7% and 3.52% of relative changes are found in asphalt and concrete reflectance data at 550 nm, and all VNIR bands demonstrate similar variations found to correlate with both illumination geometry and the relative portion of diffuse irradiance. In this letter, this effect is interpreted from a mathematic view.Further studies are needed to model the dynamics of reflectance physically.
出处
《工程建设与设计》
2016年第4期94-97,共4页
Construction & Design for Engineering
关键词
沥青路面
反射率
双光束法
物理模型
road pavement
reflectance
dual-beam method
physically model
