Traub W A, Stier M T
Appl Opt. 1976 Feb 1;15(2):364-77. doi: 10.1364/AO.15.000364.
The ir transmission of the terrestrial atmosphere is calculated at four altitudes of interest: Mauna Kea at 4.2 km (2-1000 microm), aircraft at 14 km (5-1000 microm), and balloon at 28 km and 41 km (10-1000 microm). We show both high resolution spectra (0.05 cm(-1)) and broadband averages. The results are intended to serve both as a detailed guide to the interference that is expected from the atmosphere for astronomical spectroscopy and also as an indicator of the relative change in absorption and emission that can be expected at various observing altitudes. One salient result for the spectral region around 100 microm is that the absorption (and emissivity) of the atmosphere drops by a factor of 10 for each increase in altitude of 15 km throughout the aircraft and balloon range; thus balloon-borne astronomical photometry and spectroscopy should both enjoy a considerable advantage over aircraft observations in the 30-300-microm region.
莫纳克亚山海拔4.2千米（2 - 1000微米）、飞机在14千米高度（5 - 1000微米）以及气球在28千米和41千米高度（10 - 1000微米）。我们展示了高分辨率光谱（0.05厘米⁻¹）和宽带平均值。这些结果旨在既作为对天文光谱学中预期来自大气的干扰的详细指南，也作为在不同观测高度预期的吸收和发射相对变化的指标。在100微米左右的光谱区域，一个显著结果是，在飞机和气球高度范围内，海拔每升高15千米，大气的吸收（和发射率）下降一个数量级；因此，在30 - 300微米区域，气球搭载的天文测光和光谱学相对于飞机观测都应具有相当大的优势。
