Spacecraft control system development

1
Spacecraft control system development

• Satellite Mission Operation Department
• NASDA

2
Introduction

• -Preparation of the common fundamental system of
  ETS-VIII and ALOS, which will be launched by H-2A
  Launch Vehicle after 2004
• -More reliable operation
• -Corresponding to diversify satellite functions
• -Improving efficiency of operations

3
Outline of Spacecraft control system

• Spacecraft control system is to carry out
  observation conditions, control and analysis of
  the spacecraft.
• -Satellite operation planning function
• -Real-time processing function of telemetry and
  command
• -Off-line functions of trend, event analysis,
  etc

4
System Configuration
SMACS
SPOC
SOPS
METS
plan
Telemetry data
database
STAD
SIMS
CORBA
SCOT
SMACSSpacecraft MAnagement and Control
System SPOC Spacecraft Processing and
Operation Control subsystem STAD Spacecraft
Telemetry data Analyzing and Drawing
subsystem SOPS Spacecraft Operation Planning
Subsystem SIMS Spacecraft Information
Management Subsystem SCOT Spacecraft Control
and Operation Terminal subsystem METS
Multi-Environment and Training Simulator
5
Outline of Subsystem(1)

• -SIMS
• Management of information database and operating
  procedure for spacecraft control
• -SOPS
• Planning of spacecraft operation, and get the
  resource of Tracking Network of NASDA

6
Outline of Subsystem(2)

• -SPOC
• Real-time processing of Telemetry and Command
• -STAD
• Data analysis of Archive data, and draw
  telemetry and command data
• -SCOT
• Monitor and control of subsystem

7
SPOC Function(1)

• -Telemetry checking function
• Range,transition and prediction of telemetry
  value
• etc.
• -Command sending function
• Manual execution
• Checking before sending
• Checking after sending
• etc.

8
Example of SOP
9
SPOC Function(2)

• -Automatic real time operation function
• 0. Load spacecraft plan.
• 1. Confirm condition before starting step
• 2a.Operation Data Execution
• -Send commands
• -Set configuration of Tracking Network of NASDA
• -etc
• 2b.Monitor Operation condition data
• -check range, transition of telemetry value
• -etc
• 3. Next step(Go to 1)
• 4. Load next spacecraft plan

10
SPOC execution flow
11
SPOC Function(3)

• -Monitor function on spacecraft plan
• -Checking range of telemetry value
• -Recording telemetry value
• -Checking relative change of telemetry value
• -etc
• -Setting configuration of the ground systems
• -Preparation of sending commands to Tracking
  Network of NASDA
• -Setting FOP parameter to CCSDS equipment
• -etc

12
Conclusion

• -SMACS is prepared for the common fundamental
  system of ETS-VIII and ALOS, which will be
  launched by H-2A Launch Vehicle after FY2004
• -SPOC has the automatic real-time operation
  function which controls the spacecraft according
  to the scheduled by SOPS
• -On the other hand, currently develop the
  peculiar function for ALOS,ETS-VIII