[chinathrow]

Would it be possible to use Starlink for comms if a sat is flying in a lower position?

[d_silin]

In theory, yes.

In practice, this will depend more on my negotiation skills when talking to Elon Musk and less on any technical challenge :)

[portyllo]

No, it will not be possible, no matter what Elon says.

Starlink operates in portions of the Ku and Ka bands that are reserved for Earth-to-space comms, not for space-to-space comms.

[d_silin]

My impression was that Starlink relies on inter-satellite links to route traffic. We can use the same links for our own extended network.

[portillo]

The current satellites do not have crosslinks, and in any case, in their FCC filings SpaceX talks about optical crosslinks, not RF.