MAVEN Orbital Science, Post Siding Spring |
MAVEN Orbital Science, Post Siding Spring |
Feb 19 2015, 09:19 PM
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#1
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
such a quiet mission, finally an update was released today: NASA’s MAVEN Spacecraft Completes First Deep Dip Campaign
and another item i didnt notice previously: NASA’s MAVEN Mission Identifies Links in Chain Leading to Atmospheric Loss Edit: doh!! wrong thread.. ADMIN: Moved to start a new topic of Orbital Science from the start of the deep dip campaign. |
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Jun 2 2022, 01:33 AM
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#2
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Senior Member Group: Members Posts: 1431 Joined: 26-July 08 Member No.: 4270 |
Apparently we almost lost the mission due to an IMU failure.
https://www.space.com/nasa-mars-spacecraft-maven-nearly-lost -------------------- -- Hungry4info (Sirius_Alpha)
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Jun 4 2022, 04:54 PM
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#3
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
Apparently we almost lost the mission due to an IMU failure. I have no inside knowledge about this, but I suspect that the media reports have been somewhat modulated for dramatic effect. IMU problems and subsequent use of all-stellar mode is pretty old news. See "Verification of Mars Odyssey All-Stellar Attitude Determination Ten Years After Launch", Gingerich et al, 2015, https://ieeexplore.ieee.org/document/7119001 (paywalled, but available at https://www.researchgate.net/publication/30...rs_after_launch ) The wrinkle for MAVEN was that they had some failures that required some ground-commanded manipulation of onboard redundancy. On previous missions, the transition to all-stellar could be done in a more leisurely and measured fashion. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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