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The SiriusSats received radio callsigns

The scientific and aducational satellites SiriusSat-1 and SiriusSat-2 received radio callsigns. The SiriusSat-1 (SXC1-181) is assigned the call sign RS13S (beacon frequency - 435.570 MHz), cubsat SiriusSat-2 (SXC1-182) - call sign RS14S (435.670 MHz beacon frequency).

The satellites are in the RSC Energia, where they undergo additional checks before being sent to the International Space Station. Already on July 10, the sats will start on board the Progress cargo vehicle to the ISS, in August the astronauts will send them on a free flight during a spacewalk.