介绍Ｘ波段散射计辐射计组合系统的研制，利用这一组合系统可进行同时同地相继观测，得到ＶＶ，ＨＨ，ＶＨ，ＨＶ多极化的后向散射系数σ０ｐｑ，Ｖ和Ｈ极化的辐射亮度温度ＴＢｐ和地面热发射率ｅｐ。给出了树木地面背景以及有多种金属目标的σ０ｐｑＴＢｐ观测结果，并用一层随机介质散射辐射的主被动遥感理论进行了分析，为地面主被动联合遥感和背景杂波中目标识别提供了一个实例研究 The development of X-band scatterometer radiometer combination system is introduced. With this combination system, simultaneous observation can be done in the same place and at the same time, and the backscattering coefficients of Vp, HH, VH and HV multipolarization σ0pq, V and H polarization radiation Brightness temperature TBp and surface thermal emissivity ep. The tree ground background and σ0pqTBp observations with various metal targets are given and analyzed by a layer of principal and passive remote sensing theory of random medium scattering radiation. This method provides the target recognition for the primary and secondary ground-based passive sensing and background clutter An example study