Scientists from the Institute of Solar-Terrestrial Physics of the Siberian Branch of the Russian Academy of Sciences (ISTP SB RAS) have launched an experiment to measure the temperature of the Earth's upper atmosphere. To show how the research is carried out, they invited journalists to visit the site. A correspondent from Rossiyskaya Gazeta visited the Irkutsk Incoherent Scatter Radar (IISR) and discovered that, in fact, three separate experiments are being conducted simultaneously.