In order to form ballistic conditions before launching the pilotable ships of the CST-100 Starliner (Boe-OFT 2), the “Union of MC-19”, as well as the landing of the descent ship “Union MS-18” ship, another correction of the height of the International Space Station .
According to the service of ballistic-navigation support of the Center for Flight Management TsNIIMASH (included in the Roskosmos State Corporation), June 24, 2021 at 05:40 Moscow time was issued a team on the inclusion of Engines of the Transport Cargo Ship “Progress MS-16” which worked 466 seconds. The impulse value was 0.5 m / s.
Currently, Russian specialists receive and process data on new orbit parameters. According to preliminary calculations, after maneuvers, the height of the station orbits should be about 420.3 km above the ground, an increase of 850 meters.
Note that every day the International Space Station makes 15 or 16 turns around the Earth. The track of parts of these turns passes through the zones of the visibility of Russian terrestrial command and measuring points, the other coils are “deaf”. The turn of the maneuver is chosen in such a way as to ensure the opportunity to put the command to its execution on board the ISS, and then to control the execution of the operation on telemetry information and obtain measurements of the motion parameters after maneuver using land means. Depending on the date of maneuvering, the turns, on which it is possible, may have at different times of the day.
Within the selected turn, the execution time of the maneuver is selected based on the requirements for the parameters of the ISS orbit: It is usually necessary to form an orbit close to the circular, as well as ensure the absence of dangerous convergence with “cosmic garbage” after maneuver.
Now the crew of the ISS-65 expedition is operated on board as part of the astronauts of Roscosmos Oleg Novitsky, Peter Dubrov and Astronaut NASA Mark Wanda Haya, arriving on April 9, 2021 on the ship “Union MS-18”, as well as ship crew members Crew Dragon Astronauts NASA Shane Cybrou and Megan Macacur, Astronaut of the European Space Agency Tom Sand and Astronaut of the Japanese Agency Agency Akikhiko Hoshide.