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A comment on China applies to put 200K satellites in space after calling Starlink crash risk. Parent comment
High enough that atmospheric drag doesn't require constant propulsion to maintain orbit.
Low enough to get some radiation shielding.
Lower orbits better for communication latency and imaging resolution.
Also sun-synchronous orbits are in this zone.
Good balance for coverage vs number of satellites.
There are a lot of strategic reasons why this altitude is ideal.
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High enough that atmospheric drag doesn't require constant propulsion to maintain orbit.
Low enough to get some radiation shielding.
Lower orbits better for communication latency and imaging resolution.
Also sun-synchronous orbits are in this zone.
Good balance for coverage vs number of satellites.
There are a lot of strategic reasons why this altitude is ideal.