任何物体都具有光谱特性，具体地说，它们都具有不同的吸收、反射、辐射光谱

Any object has spectral characteristics, specifically, they all have different absorption, reflection, and radiation spectrum properties. Various objects reflect different situations in the same spectral region, and the same object reflects different spectra significantly different. Even if it is the same object, at different times and places, the spectra of reflection and absorption are different due to the different angles of sunlight. Remote sensing technology is based on these principles to make judgments on objects.

Any object has spectral properties, specifically, they have different absorption, reflection, radiation spectral properties. Different objects in the same spectral region reflect different situations, and the same object reflects different spectra significantly. Even the same object, at different times and places, reflects and absorbs different spectra due to different angles of sunlight exposure. Remote sensing technology is the root of these principles, the object to make a judgment.

Any object has spectral characteristics, specifically, they have different absorption, reflection and radiation spectral properties. In the same spectral region, the reflection of different objects is different, and the reflection of the same object to different spectra is also obviously different. Even the same object, at different times and places, reflects and absorbs different spectra due to the different angles of sunlight. Remote sensing technology is based on these principles to make judgments on objects.<br>