Roscosmos said Thursday that EgyptSat-A had been successfully delivered to the designated orbit and was operating in nominal regime. However, Russian space industry sources told Sputnik that the third stage of the Soyuz rocket failed to bring the Egyptian satellite to a target orbit, and the Fregat booster was used to compensate for the orbiting error.
"It was a human factor. Experts made a mistake while calibrating the sensors before the launch at the cosmodrome. As a result, the oxidizer at the third stage of the rocket was spent prematurely, and the engine shut down before the scheduled time," the source said.
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Earlier, a Russian space industry source told Sputnik that the launch of the first test satellites of the UK's OneWeb constellation into orbit from the Kourou spaceport using the Soyuz-ST carrier rocket might be postponed due to an emergency situation during the launch of Egyptsat-A satellite.