A Ground Control System for CBERS 3 and 4 Satellites

1
A Ground Control System for CBERS 3 and 4
Satellites

• Paulo C. Cardoso
• Joaquim P. Barreto
• Kléber M. Dobrowolski
• Luciana S. Cardoso
• Leandro T. Hoffmann

Rome, 19-23 June 2006
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Agenda

• Introduction
• Systems Architecture
• Kernel Layer
• Application Layer
• Automation Layer
• Conclusion

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Introduction

• Current Operation
• MECB (SCD1, SCD2), CBERS2
• Three Satellite Control System Generations
• First (configuration files SCD1, SCD2)
• Second (config. DB / framework SCD1, SCD2,
  CBERS1, CBERS2)
• Third (Improve config DB / framework
  micro-satellites, MECB, CBERS)
• Reusability progress

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Introduction

• CBERS 3,4
• New control system generation
• Reuse for different missions
• AIT / Operation
• Operation automation
• 3 layers
• Kernel
• Application
• Automation

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Kernel Layer

• ODM Operational Database Management
• AR Archiving and Retrieving Data
• SPT Supporting
• Communication
• Configuration
• Event Message
• File Management
• Timer
• User Interface
• Special Types (Date-time, bit array)
• Meta-instance C classes

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Meta-Instance Module

• Meta-data
• Fields (structures, parameters)
• Field composition
• Conditioned or multiplexed fields
• Conditioned Transfer Functions
• Conditioned Monitoring Functions
• Default value definition
• Categories
• Meta-Fields
• Instances (of Meta-Fields)
• Applications (uses Instances)
• Models (telemetry and telecommand messages,
  communication protocol layers)

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Meta-Instance Module

• Typical Message Structure

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Meta-Instance Module

• Meta-Structure Composition

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Application Layer

• Template Architecture
• Easy to adapt
• more DB configuration and less code update
• Easy to change the code
• designed to accept changes
• Reduced coupling among modules

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Application Layer

• TMTC Telemetry and Telecommand
• RAN Ranging
• RR Range Rate
• FD Flight dynamics
• RCM Ground Station Monitoring and
  Control

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Application Layer

• SATCS configurations
• CBERS2, SCD1, SCD2 (in operation)
• CBERS2B, CBERS3, CBERS4 (to be launched)
• Micro-satellites (to be launched / CCSDS)
  EQUARS, MIRAX

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Application Layer

• TMTC Processing Kernel
• Ground and space segment validation
• Control system reuse Operation / AIT
• EGSE and Mission Control Center Commonality
• On-board computer tests
• Satellite Simulator

13
Automation Layer

• Semi-Automated
• Automate routine operations
• decrease costs /more reliability
• Operators
• non routine activities
• routine activities exceptions
• Planning (PLN)
• Scheduling (SCH)

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Intelligent Planning Module

• Multi-satellite
• allocation of ground stations to satellites
• Output PVP (Pass visibility prediction) for each
  satellite
• Mono-Satellite
• AI temporal planning technology

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Intelligent Planning Module

• Mono-Satellite
• AI temporal planning technology

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Automation Layer

• SCH
• Input FOP
• Start, send commands to the control applications
• Activity execution problem
• Run a recovery procedure
• Change to manual
• Dynamic Object Model (DOM)
• High level language (satellite operation domain)
• Operation engineers can configure PLN and SCH
  subsystems for different missions

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Conclusion

• SATCS
• Characteristics Layered development, metadata,
  design patterns
• Comply with CBERS 3,4 requirements and easy to
  configure to other missions
• Moves possible changes from code to DB
  configuration
• AIT and operation Commonality (code and DB)
• Facilitate the integration of the space and
  ground segments
• Automation
• decrease operation costs
• Provide experience to add more intelligence to
  the system in the future

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• Paulo C. Cardoso
• paulinho_at_dss.inpe.br
• Joaquim P. Barreto
• joaquim_at_dss.inpe.br
• Kléber M. Dobrowolski
• kleber_at_dss.inpe.br
• Luciana S. Cardoso
• luciana_at_dss.inpe.br
• Leandro T. Hoffmann
• hoffmann_at_dss.inpe.br