China’s forthcoming DFH-4S satellite bus will introduce new technologies for the country’s spacecraft industry, including advances in avionics and batteries, and a plasma propulsion system (PPS). The DFH-4S is one of three Chinese satellite buses under development, all to varying degrees derived from the in-service DFH-4, which appears to be the only current offering for the commercial market. The first of the new buses, the DFH-4S (for small satellites), will extend the range to a lower ...

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