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Downlink scheduling methods that minimize either contact time or data latency are described. For deep-space missions these two methods yield very different schedules. Optimal scheduling algorithms are straightforward for ideal mission scenarios. In practice, additional schedule requirements preclude a tractable optimal algorithm. In lieu of an optimal solution, an iterative sub-optimal algorithm is described. These methods are motivated in part by a need to balance mission risk, which increases with data latency, and mission ...
Published by: IEEE Aerospace Conference Proceedings Published on:
The Solar Probe Plus (SPP) mission will study the Sun s corona, one of the last unexplored regions of the solar system. The spacecraft will carry a complement of instruments closer to the Sun than any spacecraft has ever ventured. The mission concept calls for a minimum perihelion of 9.5 solar radii over an extended campaign of in-situ and simultaneous remote observations. To meet the power, mass, fault management and electromagnetic interference constraints of the mission, the SPP spacecraft architecture uses SpaceWire as t ...
Published by: Proceedings of the International Astronautical Congress, IAC Published on:
Avionics; Buses; Codes (symbols); Data handling; Digital storage; Discrete event simulation; Electromagnetic pulse; Internet protocols; Memory architecture; Network architecture; Probes; Refining; Response time (computer systems); Spacecraft; Sun; System buses; Parker Engineering