Usefulness of weak bands in midinfrared remote sensing of particulate planetary surfaces
Usefulness of weak bands in midinfrared remote sensing of particulate planetary surfaces
复制标题
弱波段在颗粒行星表面中红外遥感中的用途
DOI：
10.1029/jb092ib01p00702
复制
发表时间：
1987
影响因子：
--
通讯作者：
J. W. Eastes
中科院分区：
文献类型：
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作者：
J. Salisbury;B. Hapke;J. W. Eastes
矿物的中红外（2.5-25 μm）反射光谱常用于定性预测发射率。这些光谱显示弱泛音和组合音带，这可能是诊断的组合物作为强的基本分子振动带通常被认为是遥感应用，但已被广泛忽视。然而，与强带不同，弱带相对于中红外连续谱的对比度通常不会随着颗粒尺寸的减小而减小，而是典型地增加。为了说明这种行为，方解石和石英的透射率和反射率光谱在4000至400 cm−1（2.5-25 μm）的波长范围内。这是本文的目的是指出，这些弱带是潜在的有用的成分遥感微粒行星表面，这将需要完成支持实验室研究，以记录弱带的发生。
Midinfrared (2.5–25 μm) reflectance spectra of minerals are often used to predict emittance qualitatively. These spectra display weak overtone and combination tone bands, which may be as diagnostic of composition as the strong fundamental molecular vibration bands usually considered for remote sensing applications, but which have been widely ignored. However, unlike the strong bands, the contrast of weak bands relative to the continuum in the midinfrared usually does not decrease with decreasing particle size, but typically increases. To illustrate this behavior, transmittance and reflectance spectra of calcite and quartz are presented for the wavelength range from 4000 to 400 cm−1 (2.5–25 μm). It is the purpose of this paper to point out that these weak bands are potentially useful for compositional remote sensing of particulate planetary surfaces; this will require completion of supporting laboratory studies to document the occurrence of weak bands.