During the information detection and discrimination, the remote sensed data always represents three important characters: space character, spectral character and time character.
遥感数据源在信息提取和识别的过程中主要表现为三大特征：空间特征、光谱特征和时间特征。
2
This done I saw the spaceSpectral Estimation content.
这是我师兄做的空间谱估计的内容。
3
The polarization scattering Doppler spectral characteristics of chaff clouds in outer space are studied.