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研究微波遥感中目标和背景的介电常数，对微波遥感的解译、判读和反演具有重要作用。在静电场和交变电场情形下，叙述介电常数的概念，从微观和宏观两方面论述了介电常数的物理意义，指出外界条件对介电常数的影响，总结介电常数的测量方法，叙述其基本原理，给出了介电常数的计算方法及典型地物的介电常数公式、数据及曲线。指出目前在微波遥感中对介电常数研究和测量的局限性，以及寻找新理论及探讨能进行实地在位检测的新方法的必要性。
Studying the dielectric constant of target and background in microwave remote sensing plays an important role in interpretation, interpretation and inversion of microwave remote sensing. In the case of electrostatic field and alternating electric field, the concept of dielectric constant is described. The physical meaning of dielectric constant is discussed both in microscopic and macroscopic aspects. The influence of external conditions on dielectric constant, the method of measuring dielectric constant, Describes its basic principle, gives the calculation method of dielectric constant and dielectric constant formula, data and curve of typical objects. The limitations of current research and measurement of dielectric constant in microwave remote sensing are pointed out, as well as the necessity of finding new theories and exploring new methods for on-the-spot detection.