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There is an entire division called operations division that is dedicated to planning around the logistics of the International Space Station. It is quite complex.
Traffic pattern can be complex. That is the scheduling of visiting vehicles. There are limits on how many vehicles can be there at any one time. They have to take into account the altitude of the ISS—it’s easier and cheaper to have vehicles arrive while the ISS is low. Launch windows vary, so sometimes the crew’s day and night schedules have to be altered to have them able to support a vehicle arrival.
Inventory is probably the most complex thing to manage. There are thousands and thousands of items on the ISS. The crew have barcode readers that they can use to keep track of supplies and locations of those supplies, but it isn’t perfect. Sometimes things get put away in the wrong place, and sometimes supplies get used at an unexpected rate. The crew can’t just nip out to Home Depot when they run out of batteries or Velcro strips. Food used to be a problem. A new crew might arrive and find that the last crew drank all of the coffee but left them 500 packets of mayonnaise. It becomes more complicated when we have to rely on other partners to deliver the supplies.

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Vehicle resources like power and communications also have to be considered when planning activities. We don’t want to schedule several high-power-use activities at the same time or during eclipse. We also don’t want to schedule a critical activity during a time when space-to-ground communication might be flaky. Both of those variables are affected by vehicle attitude, which is affected by altitude, stack configuration, and beta angle.
Related to communications is the scheduling of public affairs activities. The onboard crew often speak to schools around the world. It can take a lot of finagling to line things up so that the event can happen during the school day while there is a good communication link and the crew is not otherwise tasked.
Payload experiment scheduling can be complex. There are hundreds of ongoing experiments, and we have to be careful to ensure they are all attended to properly and do not conflict with one another.

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Every command that is sent to the vehicle, either by the ground or astronauts, is done using a certified procedure. There are thousands of procedures. Those procedures often have to be revalidated whenever the vehicle changes, sometimes because of new flight software and sometimes because of new hardware and sometimes because an operations concept has changed. A system that was backup may become primary, or operational limits for a device might change.
And then of course there is the logistics that are related to the fact the the ISS is an international partnership. Getting four different international agencies to coordinate and agree to things can take a lot of negotiation.


Logistics of the International Space Station PDF downloadable:

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This thing that looks like a Star Trek transporter is their shower

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The International Space Station (ISS) is a multi-nation construction project that is the largest single structure humans ever put into space. Its main construction was completed between 1998 and 2011, although the station continually evolves to include new missions and experiments. It has been continuously occupied since Nov. 2, 2000.
As of January 2018, 230 individuals from 18 countries have visited the International Space Station. Top participating countries include the United States (145 people) and Russia (46 people). Astronaut time and research time on the space station is allocated to space agencies according to how much money or resources (such as modules or robotics) that they contribute. The ISS includes contributions from 15 nations. NASA (United States), Roscosmos (Russia) and the European Space Agency are the major partners of the space station who contribute most of the funding; the other partners are the Japanese Aerospace Exploration Agency and the Canadian Space Agency.
Current plans call for the space station to be operated through at least 2024, with the partners discussing a possible extension until 2028. Afterwards, plans for the space station are not clearly laid out. It could be deorbited, or recycled for future space stations in orbit.