SESAME Fabry-Perot Interferometer

The SESAME FPI (Satellite Experiments Simultaneous with Antarctic MEasurements Fabry-Perot Interferometer) measured Doppler shifts by imaging the wavelengths of oxygen emissions with high resolution and precision. The instrument comprised of five optical components: a scanning mirror that viewed in the 4 cardinal directions at 30 deg elevation; an etalon that consisted of a pair of quartz plates; a 1-m focal length Cassegrain telescope; a 1-nm filter wheel and an imaging photon detector. The experiment contributed to the understanding of airglow and auroral processes in the thermosphere.

SESAME FPI（卫星与南极同时测量的法布里-珀罗干涉仪）通过高分辨率和精确度对氧发射的波长进行成像，测量多普勒频移。该仪器由五个光学组件构成：一个能够观察四个基本方向的30度仰角扫描镜；一个由一对石英板组成的etalon；一个焦距为1米的卡塞格林望远镜；一个1纳米的滤光轮以及一个成像光子探测器。该实验有助于加深对热层空气辉光和极光过程的理解。