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NASA-LLIS-0597
Lessons Learned – Monitoring of On-orbit Spacecraft Health and Performance During Early Mission Checkout
Year: 1998
Abstract: Description of Driving Event:
During the critical initial on orbit operations and checkout phase, ground station personnel did not monitor the Lewis spacecraft continuously for anomalies. This was accepted based on a false belief that the spacecraft had a stable safe-mode that it would switch to automatically if anomalies were not immediately corrected. (In the Lewis implementation, the safe-mode was neither stable nor robust.) The situation was further exacerbated by the fact the spacecraft was in an interim (low altitude) orbit which had high drag and short on-station communications intervals and for which the designers had not carried out modeling.
During the critical initial on orbit operations and checkout phase, ground station personnel did not monitor the Lewis spacecraft continuously for anomalies. This was accepted based on a false belief that the spacecraft had a stable safe-mode that it would switch to automatically if anomalies were not immediately corrected. (In the Lewis implementation, the safe-mode was neither stable nor robust.) The situation was further exacerbated by the fact the spacecraft was in an interim (low altitude) orbit which had high drag and short on-station communications intervals and for which the designers had not carried out modeling.
Subject: Administration/Organization
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:33:53Z | |
| date available | 2017-09-04T18:33:53Z | |
| date copyright | 07/13/1998 | |
| date issued | 1998 | |
| identifier other | JFCEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;query=author:%22NAVY%20-%206159DD6E273C9FCD0Facil/handle/yse/216068 | |
| description abstract | Description of Driving Event: During the critical initial on orbit operations and checkout phase, ground station personnel did not monitor the Lewis spacecraft continuously for anomalies. This was accepted based on a false belief that the spacecraft had a stable safe-mode that it would switch to automatically if anomalies were not immediately corrected. (In the Lewis implementation, the safe-mode was neither stable nor robust.) The situation was further exacerbated by the fact the spacecraft was in an interim (low altitude) orbit which had high drag and short on-station communications intervals and for which the designers had not carried out modeling. | |
| language | English | |
| title | NASA-LLIS-0597 | num |
| title | Lessons Learned – Monitoring of On-orbit Spacecraft Health and Performance During Early Mission Checkout | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1998 | |
| contenttype | fulltext | |
| subject keywords | Administration/Organization | |
| subject keywords | Ground Operations | |
| subject keywords | Policy & Planning |