Аннотация: Thanks for work! The "Pirs" module is sunk. The flight path of the "Nauka" module has been changed after launch. An essay.
Thanks for work! The "Pirs" module is sunk. The flight path of the "Nauka" module has been changed after launch. An essay.
The fates of the two models - "Pirs" and "Nauka" - turned out to be interconnected.
"MOSCOW, July 26 [2021]. / TASS /. The Pirs module was successfully deorbited by the Progress cargo vehicle and sunk in the non-navigable region of the Pacific Ocean. This was reported on Monday in Roskosmos. (...)
Thanks for work, Progress and Pirs! pic.twitter.com/rKLAUr750g (...)
"This operation made it possible to free the docking station of the Zvezda service module of the ISS Russian segment to receive the Nauka multipurpose laboratory module, which was launched from the Baikonur cosmodrome on July 21, 2021," the Roscosmos noted.
The docking of the new [Nauka] module with the ISS is scheduled for July 29 [2021]. " (https://tass.ru/kosmos/11990323) [unofficial translation]
At the same time, the discussion of various issues related to the "Nauka" module continues.
Sergei Korolev was launching different types of spacecraft into near-earth orbit, to the Moon, Mars, Venus, and also along other trajectories.
One of the most important areas of cooperation of Sergei Korolev with Mstislav Keldysh, with the USSR Academy of Sciences, was the calculation of the trajectories of spacecraft launched.
As a rule, the trajectory was calculated before the launch of the spacecraft. At the time of Sergei Korolev, turning on the engines and adjusting the trajectory after the start of the flight were associated with significant difficulties. It was necessary to calculate the trajectory in the most careful way before the start of the flight.
The fact that the flight path of the "Nauka" module has been changed indicates serious problems.
"July 27, 2021 11:08. (...) The specialists managed to cope with all the problems, the module continues to approach the ISS. Anton BESMYATNYKH.
Difficulties on the "Nauka" module during the flight to the ISS are listed.
(...)
The most difficult emergency situation was the problem with the propulsion system of the [Nauka] module. The specialists had to change the flight trajectory to the ISS. As Khokhlov clarified [Alexander Khokhlov, a member of the North-West Organization of the Russian Federation of Cosmonautics], the experts managed to cope with all the problems, the module continues to approach the ISS. (...) ". (https://www.kp.ru/online/news/4378862/). [unofficial translation]
"Problem with the propulsion system of the module" - what is it? We did not manage to discover detailed and generally understandable official explanations on this matter.
So, "Pirs" module is sunk. The "Nauka" module does not move along the trajectory that was calculated before the start of the flight, but along a new one (which is caused by some problem with the propulsion system of the module).
Thanks for work!
July 28, 2021 04:12
Translation from Russian into English: July 28, 2021 04:55.
Владимир Владимирович Залесский "Спасибо за работу! Модуль "Пирс" затоплен. Траектория полёта модуля "Наука" изменена после запуска. Очерк".