在外场用已知半球反射率的靶板作为标准靶板，反演测定目标靶板激光雷达散射截面和半球反射率。

Using a plate whose hemisphere reflectivity is known as a standard plate, the lidar scattering cross section (LRCS) and hemisphere reflectivity of a target plate are measured inversely.

youdao

该方法利用半球谐基函数对入射光线正交化，利用两个半球上的笛卡儿积来定义物体表面的双向反射率分布函数。

This method USES the hemispherical harmonics basis to represent incoming radiance and USES the Cartesian product of two hemispheres to define the BRDFs.

youdao

氟碳油漆也能满足隔热降温性能指标要求，阳光反射率和半球发射率均大于80% 3纳米ato既是红外辐射材料，又是导电材料。

Can meet the performance requirements of heat insulation and cooling, sunlight reflectivity and emittance are more than 80%3 of nano ATO is the infrared radiation material, and conductive material.

youdao