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NASA-LLIS-0939

Lessons Learned – MPL Uplink Loss Timer Software/Test Errors (1998)

contributor authorNASA - National Aeronautics and Space Administration (NASA)
date accessioned2017-09-04T15:48:20Z
date available2017-09-04T15:48:20Z
date copyright02/15/2001
date issued2001
identifier otherQAUEQCAAAAAAAAAA.pdf
identifier urihttps://yse.yabesh.ir/std/handle/yse/51244
description abstractAbstract:
Prelaunch tests and verification of software and hardware used to switch to a redundant string should include assumed failures in either string during all mission phases. MPL did not verify the ability of the Lander to switch to the redundant uplink string after landing assuming a failure in the primary string had occurred during earlier entry, descent and landing phases. Recognize that transitions to another mission phase are high-risk sequences and that database changes that impact logic decisions should be retested.
languageEnglish
titleNASA-LLIS-0939num
titleLessons Learned – MPL Uplink Loss Timer Software/Test Errors (1998)en
typestandard
page3
statusActive
treeNASA - National Aeronautics and Space Administration (NASA):;2001
contenttypefulltext
subject keywordsFault Tolerance
subject keywordsFlight Equipment
subject keywordsPolicy & Planning
subject keywordsRedundancy Verification
subject keywordsRisk Management/Assessment
subject keywordsSafety & Mission Assurance
subject keywordsSoftware
subject keywordsSoftware Test
subject keywordsSpacecraft
subject keywordsSystem Integration and Test
subject keywordsTest & Verification
subject keywordsTest Planning


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