MSS四通道光谱辐射仪在NOAA／AVHRR通道的换算模式及应用

Conversion Pattern between MSS FourChannels Radiometer and the Channels Associatedwith NOAA-AVHRR,and Applying

从理论上对ＭＳＳ四通道光谱辐射仪与ＮＯＡＡ－ＡＶＨＲＲ第一和第二通道之间的换算问题进行了可行性分析，提出了数据转换的计算方法。通过正定县冬小麦光谱观测数据，计算了返青后到成熟前各生育期ＮＤＶＩ绿度植被指数，证实了灌浆期ＮＤＶＩ变化率与单产有较好的关系。

In order to making the spectrometer associated with MSS channels can be used innowadays research. The relationship between MSS Four Channels Radioineter (Model 100AX)and the first and second channel of NOAA-AVHRR is described in this paper. Theconversion coefficients had been derived from experimentation data. They are 0. 86,1 and1.81 separately for the radiometer,s channels of MSS5, MSS6 and MSS7. That means theenergy associated with CH1 of NOAA-AVHRR is 0. 86Emss7 and that of CH2 is Emss6+1. 81Emss7. We think this derivation has scientific basis and method is workable. For thedifferent growing period of winter wheat, the NDVI (Normalized Difference Vegetation-In-dex) had been calculated according to field observed data in Zhengding County, HebeiProvince. The results of statistic analysis have shown us that there is better relationshipbetween NDVI change rate of the period of being in milk and per unit area yield for winterwheat. So we make NDVI change rate of NOAA in the period of being in milk as one ofmodel factors for estimating yield of remote sensing