The Far-Infrared Surveyor (FIS) for AKARI
The Far-Infrared Surveyor (FIS) for AKARI
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DOI：
10.1093/pasj/59.sp2.s389
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发表时间：
2007-08
影响因子：
2.3
通讯作者：
M. Kawada;H. Baba;P. Barthel;D. Clements;M. Cohen;Y. Doi;E. Figuerêdo;M. Fujiwara;T. Goto
中科院分区：
文献类型：
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作者：
M. Kawada;H. Baba;P. Barthel;D. Clements;M. Cohen;Y. Doi;E. Figuerêdo;M. Fujiwara;T. Goto
远红外测量仪是AKARI卫星上的两个焦平面仪器之一。FIS有四个测光波段在65，90，140和160 μ m，并使用两种阵列探测器。FIS阵列和光学器件被设计为以高空间分辨率和冗余度扫描天空。实际扫描宽度超过8弧分，像素间距与望远镜的衍射极限相匹配。从小行星观测中导出的点扩散函数（PSF）与光学模型给出的函数相似。然而，在PSF的尾部附近可以清楚地看到显著的过量，其贡献约为总功率的30%。FIS的所有功能都在轨道上运行良好，性能符合实验室特性，但两个较长波段除外，这两个波段的性能不如特性所述。此外，FIS具有使用傅里叶变换光谱仪（FTS）的光谱能力。由于FTS利用了光度计的光学和探测器，它可以同时制作光谱图。本文总结了飞行中的技术和操作性能的FIS。
The Far-Infrared Surveyor (FIS) is one of two focal-plane instruments on the AKARI satellite. FIS has four photometric bands at 65, 90, 140, and 160 mu m, and uses two kinds of array detectors. The FIS arrays and optics are designed to sweep the sky with high spatial resolution and redundancy. The actual scan width is more than eight arcminutes, and the pixel pitch matches the diffraction limit of the telescope. Derived point-spread functions (PSFs) from observations of asteroids are similar to those given by the optical model. Significant excesses, however, are clearly seen around tails of the PSFs, whose contributions are about 30% of the total power. All FIS functions are operating well in orbit, and the performance meets the laboratory characterizations, except for the two longer wavelength bands, which are not performing as well as characterized. Furthermore, the FIS has a spectroscopic capability using a Fourier transform spectrometer (FTS). Because the FTS takes advantage of the optics and detectors of the photometer, it can simultaneously make a spectral map. This paper summarizes the in-flight technical and operational performance of the FIS.