NASA-LLIS-0350

Lessons Learned - Galileo Spacecraft Telemetry Degradation due to Antenna Multipath

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:49:05Z
date available	2017-09-04T17:49:05Z
date copyright	34649
date issued	1994
identifier other	ETAEQCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std/handle/yse/172303
description abstract	Abstract: After Galileo completed its second Earth flyby, communication signal levels received on Earth decreased and fluctuated unexpectedly. The cause was determined to be interference that was not detected during test because the test article was not consistent with the orbiter telecommunications functional requirements document. Recommendations involved use of concurrent engineering, verification of requirements compliance, updating of requirements documents based on hardware ECR's, post test evaluation of non-flight like characteristics, and assuring that hardware used for functional testing properly simulates the characteristics of the flight hardware.
language	English
title	NASA-LLIS-0350	num
title	Lessons Learned - Galileo Spacecraft Telemetry Degradation due to Antenna Multipath	en
type	standard
page	3
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1994
contenttype	fulltext
subject keywords	Communication Systems
subject keywords	Configuration Management
subject keywords	RF Performance Verification
subject keywords	Test & Verification