Except the space in these orbits is finite and a collision at say 520 km requires quick action or the entire fleet in that orbit will eventually be destroyed.

Except the space in these orbits is finite and a collision at say 520 km requires quick action or the entire fleet in that orbit will eventually be destroyed. https://conference.sdo.esoc.esa.int/proceedings/sdc9/paper/305/SDC9-paper305.pdf https://conference.sdo.esoc.esa.int/proceedings/sdc9/paper/3...