The crew of the International Space Station (ISS) was woken up by a siren on the night of October 16. The sound signal was given due to a malfunction in the control system of the Russian Zvezda module. This follows from the data of the negotiations broadcast by NASA on YouTube.
"We have now triggered an alert… In a second it was removed. But there was a siren on the station. And I didn't beat off (the siren) to our colleagues so that they would hear," cosmonaut Anton Shkaplerov said.
He believes that the siren was triggered due to the temporary loss of readiness of navigation support in the motion control and navigation system of the Zvezda module.
A day earlier, the ISS lost its orientation in space while testing the engines of the Soyuz spacecraft. According to the specialist, the Soyuz MS-18 spacecraft's SUD (motion control system) was tested at the station.
Later, the orientation of the ISS was restored using the engines of the Russian segment. It was also reported that during the testing of the Soyuz MS-18 engines, the operation of the engines affected the orientation of the station.
Pilot-cosmonaut Andrey Borisenko said that this is a "calculated emergency situation", which does not carry any difficulties for the flight program of the station and the descent from the ISS crew.
The Soyuz-2.1a carrier rocket with the Soyuz MS-19 spacecraft with a cinema crew was launched on October 5. The rendezvous with the ISS took place according to a two-turn scheme.
In orbit, the film crew will shoot a feature film in space. The picture, called "The Challenge", will be a joint project of Roscosmos, Channel One and the studio Yellow, Black and White.
On October 14, Roscosmos reported that the film crew filmed most of the materials on the ISS. The Soyuz MS-18 crew continues to actively prepare for the upcoming landing scheduled for October 17.
