基于自行研制的一种自动快速变视场太阳光度计(VFOVSP),实现了不同视场内太阳辐射的快速测量,为地基区分气溶胶粒子与云粒子提供了 一个新的技术手段。新型光度计采用基于CCD图像传感器的太阳跟踪技术,并采用程控可变视场光阑,实现了在较短的时间间隔内对 不同视场值的快速测量。通过在不同的天气条件下,对仪器不同视场测量数据分析初步表明:通过比较不同视场测量的大气光学厚度的 变化,可提供一种薄卷云与气溶胶的区分技术。该方法可以较快地识别出当前大气环境中是否有卷云存在,为研究卷云特性提供了基础。

Based on an automatic and fast variable field solar photometer (VFOVSP) developed, the fast measurement of solar radiation in different fields of view is realized, which provides a new technical means for distinguishing aerosol particles from cloud particles for ground measurement. The novel photometer adopts the sun tracking technology based on CCD image sensor and a programmable variable fields aperture, which can realize the rapid measurement of different fields of view in a short time interval. Through preliminary analysis of the measurement data of different fields of view under different weather conditions, it is shown that the way of comparing the changes in atmospheric optical thickness measured in different fields of view can provides a new technology of distinguishing thin cloud and aerosol. This method can quickly identify whether cirrus cloud exist in current atmospheric environment, which provides a foundation for studying the characteristics of cirrus cloud.