Onboard systems of Yareelo nanosatellites for solar activity and radiation monitoring

The paper presents the Yareelo project of deploying a constellation of two nanosatellites in low earth orbit. The project has been developed by students, postgraduates and young specialists of Bauman Moscow State Technical University. One of the nanosatellites is designed to observe the Sun using an X-ray spectrophotometer developed by the Lebedev Physical Institute. The payload onboard the second nanosatellite is the gamma radiation and charged particle detector (DeCoR) developed by Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University. The Yareelo nanosatellites are 1,5U Cubesats with the following systems onboard: attitude control system, power supply system, onboard complex control system, and radio communication system. The feature of the designed nanosatellites is the onboard unit of the two-bladed rotary deployable construction, operating as a drag sail. The drag sail do phase difference between the nanosatellites flying in the same orbital plane. Besides, the project mission includes the experiment on the data exchange between the two nanosatellites in the VHF band. The Yareelo nanosatellites orbit control is to be carried out using the mission control center of Bauman Moscow state technical University.