Achievements in creation of the space patrol apparatus of ionizing radiation of the Sun

The paper describes the results and achievements of our work in the creation of optical–electronic instruments for space patrol apparatus of ionizing radiation of the Sun. At present, such monitoring of the most important solar irradiance in the spectral range of 0.8–119 nm does not exist anywhere in the world because of the methodological and technical difficulties. The main difficulty was overcome only after the creation of a “solar-blind” detector—open secondary electron multiplier (SEM), which was produced by the S.I. Vavilov State Optical Institute (SOI). Now all the space patrol instrumentation has been created and laboratory tested. The basic points of the work are presented here.