NASA-LLIS-0269

Lessons Learned – Magellan Star Scanner Unit False Star Sightings

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