Measured isotope peak cluster data in a mass spectral range is obtained for a given calibration standard.

对于给定的校准标准，得到在质谱范围中的测量的同位素峰集群数据。

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Spectral data sources of sandy land included single surface feature and composite surface feature, and their spectral data were measured by different sampling methods.

沙化土地光谱数据源分为单一地物类型级和复合地物类型级两种，野外测量时分别采取不同的采样方法。

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First, retrieval model of measured data is constituted, and the radiation from the surface of target is obtained by retrieving the shot infrared image in one spectral band.

该方法首先对实测红外数据建立反演模型，由热像仪拍摄所得某波段红外图像得到目标表面的真实红外辐射。

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