Glacier has a narrowspectrum on TM5, 7 bands, but moraine and snow and ice are different in evidence, therefore, TM5, 7 are advantageous bands for extracting glacier information.
冰川在TM 5、7波段光谱值范围窄，且冰碛与冰雪有明显的光谱差异，是冰川信息提取的有利波段。
2
Horses live in a monochrome world .light visible to human eyes however occupies only a very narrow band in the whole electromagnetic spectrum.
然而，人眼可见的光在整个光谱中只占一个非常狭窄的频段。
3
For RFI and narrowband noise interferences, this dissertation studies notch filter and spectrum equilibrium and USES them to suppress narrow jammings in signal domain.