Astronomical Observatory of Lviv State University, Lviv, Ukraine.
From 1975 a research group (consists of 6 members) at Lviv Astronomical Observatory have been worked at the problem of recording the light-curves of Artificial Celestial Bodies (ACBs). At the very beginning a one channel instrument (EF-1) with automated subtraction of ligh from the back-ground of sky was developed. This electrophotometer with 10-cm objective was installed on a four-axis mounting that gave one opportunity to observe many different ACBs distances to which vary from some hundreds to some thousands kilometers (so called low ACBs). An analogous electrophotometer (EF-1A) was mounted on the star- telescope AZT-14 (reflector with diameter 50cm and focus 8m) and the geostationar ACBs (GACBs) with average distances 36000km were observed. Then the electrophotometers EF-2 with two objectives and two optical filters and EF-4 with four objectives and four filters were developed. Earch instrument has automated subtruction of light from back-ground in each channel. At present the eight-channel electrophotometer with four color and four polarimetric filters is developed. In all electrophotometers the resulting signals are recorded by the computer in the regime of "real-time". The necessary computer programs for realized this regime were formed. Many light-curves of different ACBs with these instrument were received. They are collected in the bank of data in the computer and could be used by anybody who needs such information. It should be noticed that all the electrophotometers and all computer programs were constructed and produced by Lviv astronomers themselves as in Ukraine there is no such fabric-made instruments.