Voyager Status, What is it? |
Voyager Status, What is it? |
Dec 6 2006, 05:48 AM
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#1
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Member Group: Members Posts: 428 Joined: 21-August 06 From: Northern Virginia Member No.: 1062 |
Anyone know the latest Voyager status? I've hear rumors, but I'm wondering if anyone has anything more concrete (I won't share the rumors, as I really don't know much about it, so...)
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Jun 14 2007, 06:53 PM
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#2
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Member Group: Members Posts: 234 Joined: 8-May 05 Member No.: 381 |
This is old news from the January 18, 2007, JURAP meeting, but it expands on the news Pando gave:
HYBIC SWAP TEST RESULTS REDUNDANT HYBIC TEST & TEMPORARY SWAP -PURPOSE OF THE TEST . Validate operability of HYBIC 1 and health of celestial sensors . Refine sun sensor bias offsets between HYBIC 2 and 1 . Gather information in preparation for a permanent swap and calibration or futher study --The HYBIC test was performed on 11/30/2006, DOY 335/02:32:37 UTC (6:32 PM PST). All events executed as planned. HYBIC 1 functioned properly and the pointing offset data were obtained. --At the time of the swap, the available power dropped to an unexpected level. --The MAG instrument status indicated that the Out-Board flipper status had changed and that the flipper is now ON. The instrument temperature increased significantly. --Our investigation revealed that one of the commands issued to reinstate HYBIC 1 also caused the Out-Board Flipper ON command to be issued. This caused an additional 10.2 watt of power consumption. This similar anomaly happened once before in 1998. The cause was thought to be contamination of the 2N222A transistors in the Power System (power command decoder). --It's believed that the excessive heat caused the wax pellet actuators that move the flipper back and forth from the "forward" to "reverse" position to melt. Data indicate that the flipper position is "reverse", near O degrees. --Early indications are that the Out-Board MAG is still functioning. We are awaiting more feedback from the PI's. --We have formed a team of consultants to investigate the cause of this anomaly. --The permanent swap has been delayed until this investigation is complete. |
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