PARIS — China’s latest manufacturing wins in Indonesia for high-throughput satellites (HTS), coupled with earlier contracts in Thailand and Hong Kong, indicate the challenge facing U.S.- and European-based Internet-delivery constellations planning global coverage.

The news does not get better outside China’s expanding reach. India too, which like China has set a high priority on building its own communications satellites — to the point of riding roughshod over international open-access trade regulations — has three HTS satellites on the way.

None of these systems has the throughput of a ViaSat Inc. terabit-per-second ViaSat . . .

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