Dual-telescope multi-channel thermal-infrared radiometer for outer planet fly-by missions
Dual-telescope multi-channel thermal-infrared radiometer for outer planet fly-by missions
复制标题
用于外行星飞越任务的双望远镜多通道热红外辐射计
DOI：
10.1016/j.actaastro.2016.08.009
复制
发表时间：
2016
影响因子：
3.5
通讯作者：
Aslam S
中科院分区：
文献类型：
--
作者：
Aslam S
描述了一种用于外行星飞越任务的多功能双望远镜热红外辐射计的设计，该辐射计的光谱波长范围为8-200微米，有五个光谱通带。双望远镜设计在窄视场和宽视场之间切换，以在航天器与目标相遇的范围内提供最佳空间分辨率图像。可切换双视场系统使用基于源选择镜沿着光轴的轴向旋转的光学配置。的光学设计，光谱性能，辐射精度，和检索估计的仪器进行了讨论。然后，利用计划中的美国航天局欧罗巴使命13-F7飞越轨道作为案例研究，评估了各种空间分辨率下的表面覆盖性能。
The design of a versatile dual-telescope thermal-infrared radiometer spanning the spectral wavelength range 8–200 µm, in five spectral pass bands, for outer planet fly-by missions is described. The dual-telescope design switches between a narrow-field-of-view and a wide-field-of-view to provide optimal spatial resolution images within a range of spacecraft encounters to the target. The switchable dual-field-of-view system uses an optical configuration based on the axial rotation of a source-select mirror along the optical axis. The optical design, spectral performance, radiometric accuracy, and retrieval estimates of the instrument are discussed. This is followed by an assessment of the surface coverage performance at various spatial resolutions by using the planned NASA Europa Mission 13-F7 fly-by trajectories as a case study.