Abstract—
The first results of monitoring the radiation state of the near-Earth space on the Arktika-M no. 1 spacecraft in a high-apogee Molniya orbit are considered. The characteristics of the devices of the heliogeophysical instrumentation complex GGAK-HE are presented. The results of the comparative analysis of experimental and model distributions of energetic particle fluxes of the Earth’s radiation belts in the orbit of the Arktika-M no. 1, as well as of some features of the dynamics of the outer electron radiation belt in 2021 and 2022 and the solar proton event of October 28, 2021, based on the experimental data from Arktika-M no. 1, Meteor-M no. 2, and Elektro-L no. 2 spacecraft are presented.