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Solar Array Constraint Engine Passes Critical Design Review

The Solar Array Constraint Engine (SACE) project completed its Critical Design Review (CDR) at Johnson Space Center (JSC). The review included two days of presentations and a broad discussion of verification and validation, analytics, documentation, deployment methods, training, and sustaining engineering. The review generated numerous action items and document revisions, none of which challenge the project plan.

BACKGROUND: The SACE software helps International Space Station (ISS) flight controllers safely and effectively operate ISS solar arrays. Flight controllers must position the arrays to collect adequate power for life and experiments on the station, yet avoid numerous hazards, including thruster firings, environmental contamination, communications interference, and extra-vehicular activities. SACE provides flight controllers with awareness of operational constraints that are in danger of being violated either at the current time or in the immediate future, and gives them the ability to plan solar array activities for periods of weeks into the future.

The SACE project is the result of the collaboration between NASA Ames Research Center’s Intelligent Systems Division (TI) and NASA Johnson Space Center’s Mission Operations Directorate (MOD). SACE also benefits greatly from contributions by the ISS Vehicle Integrated Performance and Environmental Resources (VIPER) team.

NASA PROGRAM FUNDING: The International Space Station / Human Exploration and Operations Missions Directorate (HEOMD)

Ames: Matthew Boyce, John Chachere, Jeremy Frank, Bobby Grewal, Michael Iatauro, Djhananjay Joshi, Greg Orzech, Tristan Smith, and Mei Wei
JSC: Macresia Alibaruho, Jason Bauer, Greg Forest, Karl Gantner, Chris Gilmore, Paul Gosling, Stephanie Grenitz, Rachel Murphy, Kelvin Shorts, Mark Smith, and James Williams

Contact: Jeremy Frank

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