We've needed a station for propellant and/or fuel for some time now. Up in GEO-on-up, which rides above the Van Allens, we want propellant / fuel for Isp and not for thrust as much. Orbit Fab are on it, rather 300 km over it (GEO). With, er... hydrazine. h/t Chung.
I suppose toxicity isn't as much a problem if it's just for planet-to-planet space. But do we have to redo Europa Report? I suppose old-tech nations hoping to start space-programmes have to . . .
Orbit Fab seem to agree and are already thinking xenon among other propellants.
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