针对大气风场矢量的星载探测应用,提出一种双视场准共路多普勒外差干涉仪方案,其采用平面镜视场耦合、K?sters棱镜单光栅干涉仪和一维成像镜的系统结构,可以同时探测两个正交方向不同高度层的视线风速,具有结构紧凑、无运动部件、探测效率高等特点.推导了基于K?sters 棱镜的准共路干涉仪非对称量Δd 与光栅利特罗角、分光棱镜尺寸等初始光学参数的关系.以基于氧原子红线(O[1D]630 nm)进行星载高层大气风场探测为例,给出了参数优化和系统设计的过程及结果,并对全系统干涉图进行建模仿真.结果表明：双视场准共路多普勒外差干涉仪具有一维空间分辨能力,在不使用视场扫描装置的情况下就可获得两个视场方向不同高度层上的干涉图,借助卫星平台运动可以获得同一目标区域的风场矢量信息.

A co-path Doppler asymmetric spatial heterodyne spectroscopy (DASH) interferometer with two fields of view to apply to wind vector observations from satellite is presented.The instrument using mirrors as field combiners,K?sters prism as beam splitter,one grating and imaging lens with focal power in one dimension can observe winds at different elevations in two orthogonal look directions.It is compact,without moving parts and efficient.An exact relation of the path offset Dd to Littrow angle and the size of K?sters prism is derived.A system for observation of the O[1D]630 nm emission form satellite is designed to show the process and result of parameters optimizing.Finally,a simulated result for the system indicate that the co-path DASH interferometer with two fields of view has space resolution ability in one dimension,it can get the interferograms at different elevations in two directions without scanning parts and it is possible to obtain the wind vector for the same volume with the help of satellite′s moving.