Maybe I'm wrong, but the Van Allen belts may also be a reason [1]. The ISS and LEO is below the belts, but the geostationary orbit is inside them, which might c

Maybe I'm wrong, but the Van Allen belts may also be a reason [1]. The ISS and LEO is below the belts, but the geostationary orbit is inside them, which might cause astronauts to be exposed to higher levels of solar radiation. [1] https://en.wikipedia.org/wiki/Van_Allen_radiation_belt https://en.wikipedia.org/wiki/Van_Allen_radiation_belt