درباره ما
NASA-LLIS-0269
Lessons Learned – Magellan Star Scanner Unit False Star Sightings
Year: 1993
Abstract: Abstract:
False star sightings by the Magellan star scanner during cruise to Venus prevented spacecraft attitude updates and occasionally caused false updates. Two causes were identified: 1) high energy solar protons sensed by the star scanner detector, and 2) quartz particles ejected from thermal blankets due to thermal shock. Selection of spacecraft sensors should consider all environmental effects. Consider the tendency of spacecraft materials to shed particles. System design must take into account the limitations of sensor and spacecraft material performance and show that the risk is acceptable.
False star sightings by the Magellan star scanner during cruise to Venus prevented spacecraft attitude updates and occasionally caused false updates. Two causes were identified: 1) high energy solar protons sensed by the star scanner detector, and 2) quartz particles ejected from thermal blankets due to thermal shock. Selection of spacecraft sensors should consider all environmental effects. Consider the tendency of spacecraft materials to shed particles. System design must take into account the limitations of sensor and spacecraft material performance and show that the risk is acceptable.
Subject: Flight Equipment
Show full item record
| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:18:14Z | |
| date available | 2017-09-04T18:18:14Z | |
| date copyright | 07/07/1993 | |
| date issued | 1993 | |
| identifier other | HQZCQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/200963 | |
| description abstract | Abstract: False star sightings by the Magellan star scanner during cruise to Venus prevented spacecraft attitude updates and occasionally caused false updates. Two causes were identified: 1) high energy solar protons sensed by the star scanner detector, and 2) quartz particles ejected from thermal blankets due to thermal shock. Selection of spacecraft sensors should consider all environmental effects. Consider the tendency of spacecraft materials to shed particles. System design must take into account the limitations of sensor and spacecraft material performance and show that the risk is acceptable. | |
| language | English | |
| title | NASA-LLIS-0269 | num |
| title | Lessons Learned – Magellan Star Scanner Unit False Star Sightings | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1993 | |
| contenttype | fulltext | |
| subject keywords | Flight Equipment | |
| subject keywords | Optical Sensors | |
| subject keywords | Spacecraft | |
| subject keywords | Workarounds |