Instrumentation for long term measuring of parameters under night sky

Abstract

The paper deals with equipment for long-term measurement. We want to collect information about night sky, quantify the obtrusive light and compare the level of it in industrial and habited areas and out of them. For long-term measurements of low level illuminance (about 10-3 lx) and luminance (about 10-3 cd/m2) should be applied not only the measuring equipments with high sensitivity, but also completely independent one with the ability to save the measured data.