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NASA-LLIS-1531

Lessons Learned - Indication of Post-Launch Degradation of the Downlink Signal due to Feedthrough (2003)

contributor authorNASA - National Aeronautics and Space Administration (NASA)
date accessioned2017-09-04T15:53:09Z
date available2017-09-04T15:53:09Z
date copyright04/18/2005
date issued2005
identifier otherQOWEQCAAAAAAAAAA.pdf
identifier urihttps://yse.yabesh.ir/std/handle/yse/56468
description abstractAbstract:
A feedthrough condition commonly occurs shortly after most JPL spacecraft launches during initial acquisition of the downlink signal. Caused by the extremely strong uplink signal transmitting over a relatively short distance, the indication of downlink signal degradation tends to elicit consternation from the Flight Control Team during a critical mission phase. Modify signal level and signal-to-noise ratio displays to indicate to the FCT when these indicators may be affected by feedthrough or saturation effects.
languageEnglish
titleNASA-LLIS-1531num
titleLessons Learned - Indication of Post-Launch Degradation of the Downlink Signal due to Feedthrough (2003)en
typestandard
page4
statusActive
treeNASA - National Aeronautics and Space Administration (NASA):;2005
contenttypefulltext
subject keywordsCommunication Link
subject keywordsCommunication Systems
subject keywordsCommunications
subject keywordsDownlink Degradation
subject keywordsFlight Operations
subject keywordsGround Equipment
subject keywordsGround Operations
subject keywordsHardware
subject keywordsRadio Frequency Subsystem
subject keywordsRange Operations
subject keywordsRF Compatibility
subject keywordsRF Interference
subject keywordsRisk Management/Assessment
subject keywordsSafety & Mission Assurance
subject keywordsSignal Acquisition
subject keywordsSpacecraft
subject keywordsSpacecraft Commanding


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