Summary of on-board computers

• DF-224/Coprocessor

  • Executes spacecraft command timeline. Provides pointing control, power system control, gathers telemetry, provides routine safemode protection, and much more

• NSSC-I

  • Executes SI command timeline. Provides safety monitoring, special purpose computing, and data interface for SIs.

• SI computers

  • SI specific operations, science data formatting and processing, local health and safety monitoring.

• PSEA

  • Provides safemode control for HST when DF-224 is down
    

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