冰云是天气和气候系统中重要的组成部分，冰晶取向通过影响其散射特性，进而影响遥感 反演和数值预报的准确性。随着冰云探测卫星计划的推进，精确量化冰晶取向的需求日益凸显。 综述了国内外冰晶取向遥感探测的研究进展，系统回顾了主被动遥感技术在不同波段的应用，分 析了各类遥感手段的探测机理及优劣势，特别强调了星载太赫兹辐射计的应用前景。尽管现有遥 感技术在冰晶取向研究中展现出一定潜力，但受限于冰晶复杂性、观测能力和反演算法的制约，定 量反演仍面临挑战。未来研究应聚焦于新型探测设备研发、冰晶散射特性精确计算、辐射传输理 论优化以及多源遥感数据融合。

Abstract：Ice clouds are a critical component of the Earth’s weather and climate system. The orientation of ice crystals influences the scattering properties of these clouds, subsequently impacting the accuracy of remote sensing and numerical weather prediction. With the advancement of dedicated satellite programs for ice cloud observation, precise quantification of ice crystal orientation is becoming increasingly important. This review summarizes research progress in the remote sensing of ice crystal orientation. Both active and passive remote sensing techniques are systematically reviewed for their application across various spectral bands. The detection mechanisms, advantages, and disadvantages of diverse remote sensing techniques are analyzed, with particular emphasis on the prospects of spaceborne terahertz radiometers. While existing techniques demonstrate some capacity for ice crystal orientation studies, quantitative retrievals remain challenging due to ice crystal complexity, observational constraints, and limitations in retrieval algorithms. Finally, future research directions are discussed, focusing on the development of novel detection instrumentation, accurate calculation of ice crystal scattering properties, optimization of radiative transfer modeling, and the synergistic integration of multi-source remote sensing datasets.