NASA’s Mars Climate Orbiter Mishap. References Official investigation report IEEE Spectrum...
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Transcript of NASA’s Mars Climate Orbiter Mishap. References Official investigation report IEEE Spectrum...
NASA’s Mars Climate Orbiter Mishap
References
Official investigation report
IEEE Spectrum investigation report
Official report on project management at NASA
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Agenda
Spacecraft and its mission Mission failure Failure causes
root cause contributing causes
NASA’s mission planning paradigm
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Agenda
Spacecraft and its mission Mission failure Failure causes
root cause contributing causes
NASA’s mission planning paradigm
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Mars Climate Orbiter - Mission
The first weather satellite for another planet profile Martian atmosphere map Martian surface Mars Polar Lander support relay for future missions
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Mars Climate Orbiter - Spacecraft
Assymetric solar array Attitude control
coarse: jet thrusters fine: 3x flywheels
Single onboard computer IBM PowerPC 20MHz 128MB RAM no tape or solid-state recorder 18MB flash
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Mars Climate Orbiter – Flight to Mars
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Agenda
Spacecraft and its mission Mission failure Failure causes
root cause contributing causes
NASA’s mission planning paradigm
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Mars Climate Orbiter - Mishap
went off course by 100 km hit the atmosphere and burned ? passed the atmosphere and went on ?
$125.000.000 loss
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Agenda
Spacecraft and its mission Mission failure Failure causes
root cause contributing causes
NASA’s mission planning paradigm
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Mission Failure – Root Cause
In NASA nomenclature a root cause is:
Along a chain of events leading to a mishap, the first causal action or failure to act that could have been controlled by policy/practice/procedure
Root Cause – failure to use metric system in ground software files used in trajectory models
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Mars Climate Orbiter - Spacecraft
Assymetric solar array Attitude control
coarse: jet thrusters fine: 3x flywheels
AMD – Angular Momentum Desaturation
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Mission Failure – Contributing Causes
In NASA nomenclature a contributing cause is:
A factor, event or circumstance which led directly or indirectly to the dominant root cause or which contributed to the severity of the mishap
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Mission Failure – Contributing Causes
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Mission Failure – Contributing Cause 1
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Mission Failure – Contributing Cause 2
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Mission Failure – Contributing Cause 3
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Mission Failure – Contributing Cause 4
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Mission Failure – Contributing Cause 5
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Mission Failure – Contributing Cause 6
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Mission Failure – Contributing Cause 7
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Mission Failure – Contributing Cause 8
Contributing causes undetected mismodelling of velocity changes navigation team unfamilliar with spacecraft failure to perform emergency trajectory correction poor system engineering process informal communication of project teams insufficient staff training insufficient navigation team stuffing poor verification of ground software
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Agenda
Spacecraft and its mission Mission failure Failure causes
root cause contributing causes
NASA’s mission planning paradigm
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NASA’s Mission Planning Paradigm
„Faster, better, cheaper“ approach
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NASA’s Mission Planning Paradigm
„Mission success first“ approach defining a minimum set of mission success criteria sufficient analysis and verification prior to launch assurance and robustness of the design ability to learn from failure
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NASA’s Mission Planning Paradigm
„Mission success first“ approach defining a minimum set of mission success criteria sufficient analysis and verification prior to launch assurance and robustness of the design ability to learn from failure
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NASA’s Mission Planning Paradigm
„Mission success first“ approach defining a minimum set of mission success criteria sufficient analysis and verification prior to launch assurance and robustness of the design ability to learn from failure
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NASA’s Mission Planning Paradigm
„Mission success first“ approach defining a minimum set of mission success criteria sufficient analysis and verification prior to launch assurance and robustness of the design ability to learn from failure
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NASA’s Mission Planning Paradigm
„Mission success first“ approach defining a minimum set of mission success criteria sufficient analysis and verification prior to launch assurance and robustness of the design ability to learn from failure
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NASA’s Mars Climate Orbiter Mishap
Thank you!
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