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Raumfahrt - ISS-ALLtag: NASA verlor fast eine Stunde Kontrolle über ISS nach Nauka Modul andocken

30.07.2021

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Beim Andocken (Video) des russischen Forschungsmoduls „Kauka“ an der Raumstation ISS - ist es am Donnerstag zu einem nicht ganz ungefährlichen Zwischenfall gekommen. Weil die Triebwerke des Moduls „versehentlich und unerwartet“ angefeuert wurden, wurde die ISS um 45 Grad aus ihrer regulären Flugbahn verschoben. Dadurch verlor die NASA für fast eine Stunde die Kontrolle über die Position der Station im All und auch der Kontakt zur Crew brach für elf Minuten ab.

Durch einen Notfalleinsatz habe die ISS aber wieder in ihre reguläre Flugbahn zurückgebracht werden können, teilte die US-Raumfahrtbehörde NASA am Donnerstag via Twitter mit. Die Besatzung sei zu keinem Zeitpunkt in Gefahr gewesen und die Internationale Raumstation und alle Systeme an Bord würden normal funktionieren.

Start des „Starliner“-Raumschiffs verschoben
Nach dem Zwischenfall teilte die NASA mit, dass sie den für Freitag geplanten Start eines „Starliner“-Raumschiffs von der Firma Boeing zur ISS zunächst auf unbestimmte Zeit verschiebe. Mit dem unbemannten Testflug soll die Grundlage dafür geschaffen werden, dass mit dem „Starliner“ künftig Astronauten zur Raumstation transportiert werden können.

Eigentlich sollte das schon längst passieren, doch beim ersten Test im Dezember 2019 hatte es das Raumschiff nicht in den Orbit und zur ISS geschafft, unter anderem wegen eines Problems mit der automatischen Zündung der Triebwerke. Die Verschiebung „gibt dem Team der Internationalen Raumstation Zeit, Tests am neu eingetroffenen ,Nauka‘-Modul von Roskosmos fortzusetzen und sicherzustellen, dass die Station für die ,Starliner‘-Ankunft bereit ist“, hieß es weiter.

Als Mehrzweckmodul ist „Nauka“ vorrangig für die Forschung gedacht. Das Modul, das vor rund einer Woche an Bord einer Trägerrakete von Kasachstan aus ins All geschossen wurde, soll aber auch als Mannschaftsquartier mit eigenem Lebenserhaltungssystem dienen. Es misst 13 mal 4,11 Meter und wiegt mehr als 20 Tonnen.

Quelle: krone.at

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New Russian lab briefly knocks space station out of position

A problem with a newly docked Russian science lab briefly knocked the International Space Station out of position

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A newly arrived Russian science lab briefly knocked the International Space Station out of position Thursday when it accidentally fired its thrusters.

For 47 minutes, the space station lost control of its orientation when the firing occurred a few hours after docking, pushing the orbiting complex from its normal configuration. The station's position is key for getting power from solar panels and or communications. Communications with ground controllers also blipped out twice for a few minutes.

Flight controllers regained control using thrusters on other Russian components at the station to right the ship, and it is now stable and safe, NASA said.

“We haven’t noticed any damage,” space station program manager Joel Montalbano said in a late afternoon press conference. “There was no immediate danger at anytime to the crew.”

Montalbano said the crew didn’t really feel any movement or any shaking. NASA said the station moved 45 degrees out of attitude, about one-eighth of a complete circle. The complex was never spinning, NASA spokesman Bob Jacobs said.

NASA’s human spaceflight chief Kathy Lueders called it “a pretty exciting hour.”

Russia's long-delayed 22-ton (20-metric-ton) lab called Nauka arrived earlier Thursday, eight days after it launched from the Russian launch facility in Baikonur, Kazakhstan.

The launch of Nauka, which will provide more room for scientific experiments and space for the crew, had been repeatedly delayed because of technical problems. It was initially scheduled to go up in 2007.

In 2013, experts found contamination in its fuel system, resulting in a long and costly replacement. Other Nauka systems also underwent modernization or repairs.

Stretching 43 feet (13 meters) long, Nauka became the first new compartment for the Russian segment of the outpost since 2010. On Monday, one of the older Russian units, the Pirs spacewalking compartment, undocked from the station to free up room for the new lab.

Nauka will require many maneuvers, including up to 11 spacewalks beginning in early September, to prepare it for operation.

In 1998, Russia launched the station’s first compartment, Zarya, which was followed in 2000 by another big piece, Zvezda, and three smaller modules in the following years. The last of them, Rassvet, arrived at the station in 2010.

Russian space officials downplayed the incident with Dmitry Rogozin, head of Roscosmos, tweeting: “All in order at the ISS. The crew is resting, which is what I advise you to do as well.”

Quelle: abcNews

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Russian module mishap destabilises International Space Station

The International Space Station (ISS) was destabilised after engines of a newly arrived Russian module inadvertently fired up.

"Mission control teams corrected the action and all systems are operating normally," US space agency Nasa said.

This was done by activating thrusters on other modules of the ISS. An investigation is now under way.

US and Russian officials stressed that the seven crew members aboard the space station were never in any danger.

The malfunction happened three hours after the Nauka module docked with the ISS on Thursday, following an eight-day flight from Earth.

Nasa officials said Nauka's jets started firing uncommanded at 12:34 EDT (16:45 GMT) "moving the station 45 degrees out of attitude".

 

The Russian Zvezda segment and a Progress freighter then responded to push the station back into its correct pointing configuration. The incident was over by 13:29 EDT.

"What we saw today was just an awesome job by the mission control flight teams," said Joel Montalbano, Nasa's ISS programme manager.

"Those guys were rock stars again and got us back in attitude control. That also shows you what a robust vehicle we have, and our ability to take these contingencies, recover from them and move on," he told reporters.

Communications with the ISS crew were lost for two periods, of four minutes and seven minutes, during the incident. However, the US agency said that the astronauts were safe. They "really didn't feel any movement", it added.

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The mishap forced Nasa and Boeing to push back Friday's uncrewed test flight of Boeing's Starliner capsule, a vehicle intended to carry astronauts in the future.

"We wanted to give the ISS programme time to assess what had happened today, to determine the cause and make sure that they were really ready to support the Starliner launch," explained Steve Stich, the manager of Nasa's commercial crew programme.

 

"Right now the earliest opportunity would be Tuesday, 3 August, which would be a 13:20 EDT (17:20 GMT) launch.

ERAIMAGE SOURCEESA
image captionThe delay for Nauka has also affected the European robotic arm
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The 13m-long, 20-tonne Nauka was earlier attached to the rear of the orbiting platform, linking up with the other major Russian segments on the station.

The module should have launched in 2007, but the vessel suffered repeated slips in schedule, in part because of budget difficulties but also because engineers encountered a raft of technical problems during development.

Even after it launched from the Baikonur Cosmodrome in Kazakhstan a week ago, it experienced propulsion issues that required workarounds from controllers in Moscow.

In the end, however, it docked with the station on the planned date.

The new module will result in a significant boost in habitable volume for the ISS, raising it by 70 cubic metres.

 

Cosmonauts will use the extra space to conduct experiments and to store cargo. They'll also use it as a rest area, and it has another toilet for crew to use on the station.

In addition, the module carries with it a large robotic arm (ERA) supplied by the European Space Agency (Esa).

This 11m-long device will be able to operate all around the Russian end of the ISS. With the aid of an "elbow" joint, it will shift position by moving hand over hand.

Nauka's installation comes just as Russia has been questioning its future role in the ISS project.

Moscow officials recently warned about the more-than-20-year age of some of their on-orbit hardware and intimated the country could pull out of the station in 2025. And Russia has shown little interest in joining the US-led lunar platform, known as the Gateway, which will be assembled later this decade.

Quelle: BBC

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