Ferlemann F, Bauer N, Fitzenberger R, Harder H, Osterkamp H, Perner D, Platt U, Schneider M, Vradelis P, Pfeilsticker K
Appl Opt. 2000 May 20;39(15):2377-86. doi: 10.1364/ao.39.002377.
A newly developed UV-visible instrument for differential optical absorption spectroscopic measurements of atmospheric trace gases from balloon platforms is described. Direct solar light at daytime in the near-ultraviolet (320.6-422.6-nm) and the visible (417.6-670.7-nm) spectral ranges can be simultaneously analyzed for the atmospheric column abundances or profiles of O(3), NO(2), NO(3), BrO, OClO, O(4), H(2)O, and possibly other species (HNO(2), IO, CH(2)O). Compared with previously used balloonborne UV-visible spectrometers, the instrument has the superior properties of low mass (42 kg), low power consumption (30 W), decreased spectral drift that is caused by temperature and pressure changes, low detector dark current, and low spectrometer stray light. The three last-named characteristics are achieved by enclosure of the entire spectrometer in a pressurized and thermostated container and by inclusion of separately thermostated photodiode array detectors. The optical setup is simplified to reduce its weight. The spectral stray light is reduced by suppression of the higher-order and zero-order grating reflections by use of light traps and in the UV by addition of a dispersive prism preanalyzer. The major instrumental design characteristics and the instrumental performance as tested in the laboratory and during several stratospheric balloon flights are reported.
本文介绍了一种新开发的用于从气球平台对大气痕量气体进行差分光学吸收光谱测量的紫外可见仪器。白天在近紫外（320.6 - 422.6纳米）和可见光（417.6 - 670.7纳米）光谱范围内的直接太阳光可同时用于分析大气柱中O(3)、NO(2)、NO(3)、BrO、OClO、O(4)、H(2)O以及可能的其他物种（HNO(2)、IO、CH(2)O）的丰度或廓线。与先前使用的气球载紫外可见光谱仪相比，该仪器具有质量轻（42千克）、功耗低（30瓦）、因温度和压力变化引起的光谱漂移减小、探测器暗电流低以及光谱仪杂散光低等优异特性。通过将整个光谱仪封装在一个加压且恒温的容器中，并采用单独恒温的光电二极管阵列探测器实现了最后提到的三个特性。简化了光学装置以减轻其重量。通过使用光阱抑制高阶和零阶光栅反射，并在紫外波段添加色散棱镜预分析仪来降低光谱杂散光。报告了主要的仪器设计特点以及在实验室和几次平流层气球飞行中测试的仪器性能。
