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Wikipedia has a good overview of the ISS's ECLSS. This paper also includes some details. In particular, the Atmosphere Control and Supply (ACS) The ACS subsystem provides cabin atmosphere pressure control, overpressure relief, pressure equalization, rapid depressurization detection and response, nitrogen and oxygen distribution, and nitrogen and oxygen high ...


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tl;dr: It could be dozens of years from now or it could be next week! Since the artificial satellite orbits are constantly changing, what's necessary is to regularly run a conjunction search program that updates itself with the latest TLEs for the satellites, and uses them to look far enough ahead that you can book a flight. As your map tells us, two ...


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The CO2 content of fresh outdoor air is about 0.03 %. The NASA long-duration spacecraft maximum allowable CO2 concentration is 0.7 %. Indoor air of good quality has up to 0.08 % CO2, medium quality between 0.08 and 0.1 % CO2, low quality between 0.1 and 0.14 % and poor quality above 0.14 %. The maximum allowable workplace concentration in Germany for up to 8 ...


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2021 update: It turns out that the Neumann drive was never installed on the ISS. Instead, Neumann Space will perform a 1st flight demonstration on a 6U Cubesat in 2022. See a more detailed answer in this answer to Was the Isp = 11,000 seconds Neumann Drive tested on the ISS? Did it work? How well did it perform?


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2021 update: It turns out that the Neumann drive was never installed on the ISS. Instead, Neumann Space will perform a 1st flight demonstration on a 6U Cubesat in 2022. See a more detailed answer in this answer to Was the Isp = 11,000 seconds Neumann Drive tested on the ISS? Did it work? How well did it perform?


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Patrick Neumann told me they had to raise a bunch of cash in order to pay for ride and slot on the Airbus/ESA Bartolomeo module for the ISS. I suspect they weren't able to do it in time and had to find other ways to perform a flight demonstration. See https://neumannspace.com/the-spirit-mission-is-a-go/ which describes their scheduled first flight on a 6U ...


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