Development of an optical ozonesonde for observations of ozone densities in the upper stratosphere

在1994财政年度，一台光学臭氧探空仪的通道带有302 nm的紫外带通滤光片，用于臭氧测量，以及一条带有可见光带通滤光片的通道，位于420 nm，用于校正臭氧探空仪的纬度。在气球实验之前，使用温度稳定室测量了探测器和放大器的温度依赖关系。利用光学臭氧探测仪测量平流层臭氧的气球实验于1994年5月、8月和10月在挪威空间与航天科学研究所三陆气球中心进行，并于7月在挪威斯皮茨卑尔根进行。我们评估了这些实验的结果，发现需要进行以下改进以获得棱柱形臭氧分布：1)改进扩散板的设计和材料，2)改进低通滤光器以消除所获得数据上的噪声，3)黑盘以防止气球反射的光进入扩散板。我们于1995年9月和1996年1月在三陆气球中心用改进的光学臭氧探测仪进行了气球实验。在我们的数据中发现了高度尺度为数千米的臭氧变化。通过本研究，建立了光学臭氧探空技术。

In FY 1994, an optical ozonesonde which has a channel with an ultraviolet bandpass filter at 302 nm for ozone measurement and a channel with a visible bandpass filter at 420 nm for correction of atitude of the ozonesonde. Prior to a ballon experiment, temperature dependence of detectors and amplifiers were measured using a temperature stabilized chamber. Balloon experiments to measure stratospheric ozone using the optical ozonesondes were conducted at Sanriku Balloon Center of Institute for Space and Astronautical Science in May, August and October and in Spitsbergen, Norway in July, 1994. We evaluated the results of these experiments and found that following improvements are necessary to obtain a prisice ozone profile : 1) improvement in design and material of the diffuser plate, 2) improvement in the low-pass filter to remove noise on the obtained data, 3) a black disk to prerent light reflected by a balloon from entering into the diffuser plate. We performed balloon experiments with the improved optical ozonesondes at Sanriku Balloon Center in September 1995 and January 1996.Ozone variations with an altitude scale of several kilometer have been found in our data. It is concluded that the optical ozonesonde technique has been established by this study.