EGOS 2005 Workshop

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An Integrated Commanding Environment for
SCOS-2000 based Mission Control Systems

• EGOS 2005 Workshop
• ESOC, 8-10 November

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Presentation Summary

• General overview
• Command procedures
• Architecture
• Main design concepts
• Conclusions

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General Overview

• Framework for structured procedures preparation
  and execution
• Client-server scalable architecture, compatible
  with SCOS-2000 3.1 and 4.0
• Graphical procedure editing and debugging tools
• Automatic and manual (step-by-step) procedure
  execution
• Multi-satellite monitoring control capabilites
• Full support of contingencies (server hot
  redundancy and crash recovery)
• Derived from Dataspazios automatic execution
  framework (ACM)

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Operational Context
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Command Procedures

• XML file based on PLUTO standard
• Support of
• TC activities
• flow control statements (IF-THEN, LOOP, RETURN,
  STOP, WAIT)
• preconditions and confirmations blocks
• local and global variables
• complex expression handling, integrated with
  satellite TM
• sub-procedure calls
• synchronous wait
• external O.S. commands or scripts calls
• Multi-satellite TM/TC/EV handling

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Command Procedure Entities

• A procedure contains steps
• A step contains
• Precondition
• Statements
• Confirmation
• A statement can be specialized in
• Activity
• Call to a sub-procedure
• Flow-control statement
• Assignment
• Call to O.S. script or system function
• Wait for event, condition or absolute/relative
  time
• Log message

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Command Procedure Workflow
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High-level Architecture
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Main Design Concepts (1)

• Executor
• CORBA server
• Procedures immediate or scheduled execution
  (time-based, event-based)
• Commanding environment configuration control
• Procedure history data archiving
• Hot redundancy and crash recovery
• Archive
• CORBA server
• Permanent procedure storage in a centralized
  repository
• Based on SCOS-2000 FARC services for file
  versioning control
• Extensions for handling server redundancy issues

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Main Design Concepts (2)

• Editor
• GUI application for user-friendly procedure
  creation, editing and archiving
• Displaying in tabular mode, or in a flow-chart
  like fashion
• Dedicated GUIs for handling supported statements
• Utilities for import from external sources, and
  from SCOS-2000 SSF of TPF

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Main Design Concepts (3)

• Monitor
• GUI application to inspect on-going procedures,
  and their overall running status.
• Start of a new session or control of on-going
  sessions (pause-resume-stop) for authorized
  users 
• Attach to an on-going procedure via Debugger
• Displaying of procedure execution historical
  data, with filtering and printing capabilities

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Main Design Concepts (4)

• Debugger
• GUI application for step-by-step run and
  execution flow monitoring
• Common debugging features such as Step, Next,
  Pause, Cont or Abort
• Inspector GUIs for actual variable table and data
  call stack
• One-shot execution of a statement, or starting
  point setup

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Short-long Term Objectives

• Final validation in two national missions
• Extensions for supporting watchdogs and parallel
  execution
• Migration to SCOS-2000 5.0
• Replacing Ilog based HCIs with Java SWT

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Contacts in Dataspazio