L+200: Logbook – Part 1 – pre-departure
Vota @Avamposto42 ai #MIA15.Il sito della Missione Futura di Samantha Cristoforetti è stato nominato in ben tre…
Publiée par Scientificast.it sur Mardi 1 septembre 2015
02/09/2015
Vota @Avamposto42 ai #MIA15.Il sito della Missione Futura di Samantha Cristoforetti è stato nominato in ben tre…
Publiée par Scientificast.it sur Mardi 1 septembre 2015
02/09/2015
11/06/2015
Today at around 17:27 CET ESA astronaut Samantha Cristoforetti will break the record for the longest uninterrupted spaceflight of an ESA astronaut. She was originally planned to return to Earth on 12 May but her Futura mission was extended after a problem with a Progress supply ferry.
The record was held until now by ESA astronaut André Kuipers who spent 193 days in space in 2012 for his PromISSe mission. His mission was also extended after a spacecraft problem. From his blog:
“A leak was found on the Soyuz capsule that was supposed to ferry the Expedition 31 crew up here. So the next Soyuz in line is being prepared quickly. It will not be ready before mid-march so the launch has been delayed by two months. This will delay landing for Dan, Anton and Anatoly. This also has consequences for myself, Don and Oleg. The delay is now six weeks and the official landing date is set for 1 July.”
Neither Samantha or André have the record for the most time an ESA astronaut has spent in space, that record goes to ESA astronaut Thomas Reiter with 350 days spent in space over two missions, 179 on space station Mir in 1995 and 171 on the International Space Station as part of Expedition 2 in 2006.
04/06/2015
13/05/2015
03/05/2015
Practicing emergencies is necessary so I accept that the volunteer fire department near our home at Hochstadt runs their siren in the evening, even though it excites our 3-year-old daughter just before bedtime. We also need to practice emergencies on the International Space Station in space you cannot phone highly-trained rescue workers to come to the rescue. Astronauts must be able to fend for themselves, extinguish a fire and protect themselves from any fumes. Even radio contact with experts in control centers cannot be assumed to work in a worst-case scenario.
In today’s emergency exercise the control centres and astronauts worked together on a so-called On-Board Training or simply OBT. We had “stage directions” that defined for example that a leak would appear in the Japanese Kibo module through which air would escape.
The alarm sounded on the Space Station with its penetrating noise and the computer screens of our Flight Controller filled up with numerous error messages, proving that the International Space Station had configured itself in emergency mode. The astronauts onboard reported shortly afterwards to Mission Control Houston with the news that they had a pressure drop on the Space Station to contend with. All radio communication between crew and flight controllers began with the words “For the workout exercise:” to ensure that everybody knew it was not a real emergency, but an exercise.
The flight director in Houston declared a “Space Craft Emergency” – of preceded by “for the training exercise”. Sinje Steffen of the STRATOS team at the Columbus Control Centre checked whether Columbus was automatically reconfigured for this Rapid Depress scenario.
The astronauts convened in the meantime 350 km above close to their Soyuz spacecraft. Since the Russian capsules are the Station’s lifeboats, each astronaut has a well-defined place there. They are usually the first assembly point of crew in an emergency. Once there, they decide together on how to proceed based on the scheme “Warning – Gather – Fight”. In our emergency script scenario, the astronauts had about five hours until critical low pressure (designated as T.Res) would be reached – time enough to try to find the leaking module and possibly stop the International Space Station from ‘bleeding out’.
The astronauts followed the well-defined sequence to close various hatches to measure on which side the pressure dropped further. Slowly they were able to find their way closer and closer to the actual leak.
Columbus Flight Director Katja Leuoth and her team was busy keeping up with the falling pressure values: a long list of minimum air pressure certification values exist for all Columbus components – each of these elements had to be switched off before their critical pressure was reached. Today’s commands were “for the training exercise”, so actual commands were not issued and power was not actually switched-off…
The rapid pressure-drop (rapid depress) is one of three major emergency scenarios that are defined for the International Space Station.
Depending on the size of the leak, there are various ways to “clog the hole”: from an oversized bicycle-patch to a plasticine-like material. All sealing is done of course from inside the space station – and is easy: Compared to the vacuum of space the pressure inside the ISS is considerable higher and pushes any seal onto the leak – a clear advantage compared to repairing a bicycle inner tube…
Thomas Uhlig, Columbus Control Centre
21/04/2015
As you’ve probably noticed, I haven’t been writing much this past month – my evenings have been just flying away, divided between the irresistible pull of the Cupola, other outreach projects and many little personal things that need to be taken care of.
During the day the Space Station keeps us really busy with science, maintenance, housekeeping, logistics and maintaining our proficiency in emergency responses, robotics, Soyuz flying…you name it. The variety of things we do up here is mind blowing, if I stop to think about it. Oh, and by the way, we also had a Soyuz undock earlier this month, taking home half of our Space Station population. Well, at least in terms of human presence – I’m sure the microorganisms living up here, who outnumber us by orders of magnitude, would claim that it’s “their” Space Station and don’t care much if three biped mammals are replaced by three different ones. We, on the other, do care. It was hard to see Sasha, Butch and Elena leave after being so close for four months and we did become just a little bit apprehensive when communication with their Soyuz was lost during the engine burn, which was somewhat unexpected. So we were happy to hear from Moscow that the search & rescue teams had made contact with the capsule and even happier to see our friends’ smiling faces as they got their first breaths of fresh air in Kazakhstan. In case you’re wondering, we saw them on NASA TV, like many of you, I reckon. Not sure I mentioned before, but we can get a TV station transmitted live on one of our laptops when we have satellite coverage for the Ku-Band antennas. For a couple of weeks the Space Station felt even bigger than usual, with Terry, Anton and I as the only (human) inhabitants. Not only were there fewer people around, but of course we were only getting half of the work done, so there was less com on space-to-ground. Overall, if felt a lot quieter. And now we’re back to six! Scott, Gennady and Misha have joined us last week and have added their personalities to the mix to create the new dynamic of Expedition 43. It’s such an invaluable opportunity to be part of two different crews: in the end, it’s the human interactions that determine our experience up here, so in a way it’s like having two space missions instead of one. And if you have such awesome crewmates as I have had on Expedition 42 and have now on Expedition 43… well, life is good! Also, Terry and I have it really easy in terms of handover: Scott has already been up here for six months just 4 years ago, so he really doesn’t need the amount of guidance and coaching (and patience!) that we required at the beginning from Butch. Scott is basically already autonomous and has already given some inputs that have improved our life and work. Always good to add a new perspective to the equation! So, here we are, it’s April 1st already and, barring changes, my Soyuz will undock on May 14th. With me onboard, unless I hide really well. I have only 42 days left on ISS, which is of course a cool number, but it’s also not much. If I sound a little sad saying this, it’s because I am. Anyway, with so little time left I am committed to resume regular logbooks: there is so much still that I have to share with you! I thought I’d start by sharing some picture of life and work from the past four months: check out the captions for some insight. Talk to you soon!
02/04/2015
Watch the replay of the handing over here:
[youtube bsd3oOKIBLM]
10/03/2015
05/03/2015
Time for farewells!! The Dragon spacecraft left the International Space Station earlier this week and today ESA’s ATV spaceship with the catchy name Georges Lemaître detached from the Station and will plunge after several orbits into Earth’s atmosphere. Due to the enormous heat from friction caused by its deceleration through the upper layers of air layers the spacecraft will turn into a huge fireball – a fitting end to the spacecraft that is named after one of the founding fathers of the Big Bang theory!
Unfortunately, this will be the last ATV – after five very successful missions, the project is now complete. At the Columbus Control Center (Col-CC) we provided for each flight the ground infrastructure and supplied our colleagues at ATV Control Centre in Toulouse, France, with data, video and voice connections to the International Space Station network. After ESA astronaut Samantha Cristoforetti and cosmonaut Alexander Samokutyaev closed the hatches of ATV yesterday, the Space Station was prepared for the last hours of undocking of ATVs. We turned off our little amateur radio station [https://www.ariss.org/] in Columbus as well as the external Rapidscat experiment [https://www.jpl.nasa.gov/missions/iss-rapidscat/], any radio interference with ATV’s navigation from the International Space Station should be avoided.Slowly the Space Station turned to an appropriate orientation for undocking. When the moment arrived the Space Station’s active position control was turned off completely: Georges Lemaître needs to push away from the Space Station without the mothership trying to compensate for this force.
Afterwards all that remained was for the astronauts to wave good-bye … ATVs are part of a large space fleet that supplies the International Space Station. When the American Space Shuttle withdrew from service the Russian Soyuz spacecraft became the only way to get people to the Space Station and back on Earth. Three astronauts share a small space – and so there is little room for other supplies.
Despite this there is enough transport capacity to supply the International Space Station with vital cargo: The Russian unmanned Progress cargo has been flying for years as well as the Japanese HTV and the European ATV. Relatively new in the family of cargo ferries are two unmanned American commercial vehicles: SpaceX’s Dragon and Orbital Science’s Cygnus. While the ATV and Progress ships fly to the International Space Station and dock on their own accord, the others need assistance from the Station’s robotic arm. They approach the Station and fly in formation together – not so easy with complex orbital mechanics to calculate – before being gently captured by the robotic arm and moved securely to a docking port. Only then can the astronauts enter and start unloading cargo. It is much more complicated to bring something from the International Space Station back to Earth. The ATV, HTV, Progress and Cygnus spacecraft have no heat shield or other systems that are needed to survive a reentry into Earth’s atmosphere: they are designed to burn up in the upper layers of the atmosphere of Earth. Because of this the astronauts load them full of trash from the International Space Station and they serve as cosmic garbage disposal. Aside from the manned Soyuz only the Dragon is designed to withstand the tremendous energy from decelerating at speeds of 23 faster than the speed of sound. Paradoxically it is more difficult to get things from the Space Station to Earth than vice versa.Tom Uhlig, Columbus Flight Director at the DLR center in Oberpfaffenhofen/Germany
Cover image by ESA astronaut Samantha Cristoforetti: https://www.flickr.com/photos/astrosamantha/16546104212/ .
16/02/2015