PARIS — International regulators are weighing whether to tighten rules that permit owners of large satellite constellations to launch a single spacecraft to meet their in-service deadline, a policy seen as allowing an operator to block the use valuable radio spectrum for years without deploying its fleet.

Satellite fleet operator SES, which is taking an active role in the regulatory debate, has proposed to regulators a compromise that recognizes the unique nature of large constellations while also enforcing much stricter requirements.

SES’s proposal, which falls between current international . . .

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