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NASA-LLIS-3716: Lessons Learned - Testbed Limitations May Impact End-to-End Flight System Testing
Abstract: Abstract:
After 11 year of spaceflight, it was discovered that the dual string Stardust/NExT spacecraft was incapable of switching to the redundant flight system. Flight software changes made only 3 ...
After 11 year of spaceflight, it was discovered that the dual string Stardust/NExT spacecraft was incapable of switching to the redundant flight system. Flight software changes made only 3 ...
NASA-LLIS-1799: Lessons Learned – Erroneous Onboard Status Reporting Disabled IMAGE's Radio
Abstract: Abstract:
The loss of the IMAGE satellite was attributed to a Single Event Upset-induced "instant trip" of the Solid State Power Controller (SSPC) that supplies power to the single-string Transponder. ...
The loss of the IMAGE satellite was attributed to a Single Event Upset-induced "instant trip" of the Solid State Power Controller (SSPC) that supplies power to the single-string Transponder. ...
NASA-LLIS-1743: Lessons Learned – Mitigating the Risk of Single String Spacecraft Architecture
Abstract: Abstract:
Mars Exploration Rover met and exceeded mission requirements despite a largely single string spacecraft architecture. Balance the risk of a single string flight system with effective risk ...
Mars Exploration Rover met and exceeded mission requirements despite a largely single string spacecraft architecture. Balance the risk of a single string flight system with effective risk ...
NASA-LLIS-1772: Lessons Learned - Know How Your Software Measurement Data Will Be Used
Abstract: Abstract:
When software measurement data used to support cost estimates is provided to NASA by a project without an understanding of how NASA will apply the data, discrepancies may produce erroneous ...
When software measurement data used to support cost estimates is provided to NASA by a project without an understanding of how NASA will apply the data, discrepancies may produce erroneous ...
NASA-LLIS-1805: Lessons Learned – Mars Global Surveyor (MGS) Spacecraft Loss of Contact
Abstract: Abstract:
Contact was lost with the Mars Global Surveyor (MGS) spacecraft in November 2006 during its 4th extended mission. A routine memory load command sent to an incorrect address 5 months earlier ...
Contact was lost with the Mars Global Surveyor (MGS) spacecraft in November 2006 during its 4th extended mission. A routine memory load command sent to an incorrect address 5 months earlier ...
NASA-LLIS-1807: Lessons Learned – Inheritance Review of the Mars Phoenix Flight System
Abstract: Abstract:
Despite the unusually large percentage of the Phoenix design and hardware that was inherited from previous Mars spaceflight projects, the format used for Phoenix project system and subsystem ...
Despite the unusually large percentage of the Phoenix design and hardware that was inherited from previous Mars spaceflight projects, the format used for Phoenix project system and subsystem ...
NASA-LLIS-2476: Lessons Learned – Place Flight Scripts Under Configuration Management Prior to ORT
Abstract: Abstract:
When flight scripts developed independently by project personnel are not placed under configuration control early enough in flight software development, multiple versions of the scripts tend ...
When flight scripts developed independently by project personnel are not placed under configuration control early enough in flight software development, multiple versions of the scripts tend ...
NASA-LLIS-2050: Lessons Learned – NASA Study of Flight Software Complexity
Abstract: Abstract:
Flight software development problems led NASA to study the factors that have led to the accelerating growth in flight software size and complexity. The March 2009 report on the NASA Study on ...
Flight software development problems led NASA to study the factors that have led to the accelerating growth in flight software size and complexity. The March 2009 report on the NASA Study on ...