New instrument for determination of directional emissivity and distribution principle of directional emissivity of some major types of ground objects

As one of the three factors for multiangular remote sensing, directionality of the emissivity has an important effect on measurements. This paper puts forward one method to measure the directional emissivity of objects. According to this method, one new instrument is developed. The instrument then is applied to measure some types of ground objects and samples. This paper first describes the method and discusses several questions during the measuring process. Data of ground objects and samples are processed and analyzed. Finally, curves of directional emissivity are given.