AIRS圆盘平均观测的中红外特性
Mid-Infrared Properties of Disk Averaged Observations of Earth with AIRS
摘要：
我们研究了AQUA航天器上的大气红外探测器（AIRS）仪器获得的地球中红外光谱，以探索有朝一日可能在太阳系外类地行星中观察到的特征。我们已经使用AIRS红外（R ~ 1200; 3.75-15.4微米）光谱构建了直接观测的高分辨率光谱的唯一已知的生命承载的行星，地球。AIRS光谱是第一个跨越季节的光谱。我们调查的旋转和季节性的光谱变化，将出现由于不同的云量和观看几何形状，我们探索什么样的签名可以观察到中红外线的下一代望远镜能够观测太阳系外类地行星。
英文摘要：
We have investigated mid-infrared spectra of Earth obtained by the Atmospheric Infrared Sounder (AIRS) instrument on-board the AQUA spacecraft to explore the characteristics that may someday be observed in extrasolar terrestrial planets. We have used the AIRS infrared (R ~ 1200; 3.75-15.4 microns) spectra to construct directly-observed high-resolution spectra of the only known life bearing planet, Earth. The AIRS spectra are the first such spectra that span the seasons. We investigate the rotational and seasonal spectral variations that would arise due to varying cloud amount and viewing geometry and we explore what signatures may be observable in the mid-infrared by the next generation of telescopes capable of observing extrasolar terrestrial planets.
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