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NASA-LLIS-0350
Lessons Learned - Galileo Spacecraft Telemetry Degradation due to Antenna Multipath
Year: 1994
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.
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.
Subject: Communication Systems
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| 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 |