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NASA-LLIS-0403
Lessons Learned - Thrusters Fired on Launch Pad (1975)
Year: 1996
Abstract: Abstract:
Inadvertent commanding of the safing sequence while the Viking (VO-2) spacecraft was still on the launch pad enabled the RCS thrusters. The thrusters fired in an attempt to compensate for the Earth's rotation, resulting in a significant loss of attitude control gas. When command sequences intended to be exercised only in the event of abnormal spacecraft activity are stored onboard, consider the consequences of their activation during system test or the pre-launch phases.
Inadvertent commanding of the safing sequence while the Viking (VO-2) spacecraft was still on the launch pad enabled the RCS thrusters. The thrusters fired in an attempt to compensate for the Earth's rotation, resulting in a significant loss of attitude control gas. When command sequences intended to be exercised only in the event of abnormal spacecraft activity are stored onboard, consider the consequences of their activation during system test or the pre-launch phases.
Subject: Ground Operations
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:25:58Z | |
| date available | 2017-09-04T17:25:58Z | |
| date copyright | 04/26/1996 | |
| date issued | 1996 | |
| identifier other | CJBEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/149103 | |
| description abstract | Abstract: Inadvertent commanding of the safing sequence while the Viking (VO-2) spacecraft was still on the launch pad enabled the RCS thrusters. The thrusters fired in an attempt to compensate for the Earth's rotation, resulting in a significant loss of attitude control gas. When command sequences intended to be exercised only in the event of abnormal spacecraft activity are stored onboard, consider the consequences of their activation during system test or the pre-launch phases. | |
| language | English | |
| title | NASA-LLIS-0403 | num |
| title | Lessons Learned - Thrusters Fired on Launch Pad (1975) | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1996 | |
| contenttype | fulltext | |
| subject keywords | Ground Operations | |
| subject keywords | Pre-Launch Constraints | |
| subject keywords | Software | |
| subject keywords | Spacecraft |