Error-free command link for sounding rockets and satellites

Computer Science – Sound

Scientific paper

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Space Flight: Techniques, Instrumentation, Ranges

Scientific paper

The Swedish Space Corporation has developed an error-free command uplink system for sounding rockets and satellites. The system architecture allows for safe command transmission without any time penalties during normal operation, and it recovers fast and wholly transparent from transmission errors without any user or operator interaction. The implementation is partly based on the CCSDS recommendations regarding satellite uplinks, but modified to better suit the PCM-based downlink systems, normally used for sounding rockets systems and small satellites. The system has proven extremely efficient and reliable during several small- and micro satellite projects such as ODIN, TeleFoton and Astrid-2. This paper presents the system architecture and shows the details for the implementations used in the Swedish scientific satellites ODIN and Astrid-2.

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