New Horizons' quick trip & recovery from safe mode |
New Horizons' quick trip & recovery from safe mode |
Mar 27 2007, 06:41 PM
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Member Group: Members Posts: 153 Joined: 14-August 06 Member No.: 1041 |
http://pluto.jhuapl.edu/overview/piPerspec...ive_current.php
QUOTE (Alan Stern) Since a bad word in C&DH memory could invoke an unpredictable spacecraft action, C&DH is programmed to command itself to reboot (and thus restore memory from a boot PROM) whenever such an double-bit error is detected. But whenever C&DH resets, our onboard autonomous fault-detection and -protection system declares an emergency and commands the spacecraft to suspend all current activities and go to a "Safe Mode." That sounds like my mother's behavior whenever she hears a bad word. Is it a coincidence that this occurred while New Horizons was surfing in Pluto's magnetosphere? Has the single bit error count been up since the Jupiter boost? Perhaps Jupiter is a little peeved about the theft of gravitational energy... |
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Mar 28 2007, 02:21 AM
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#2
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Think you meant Jupiter's magnetosphere... ...but I wouldn't be a bit surprised if this was some sort of radiation or cosmic ray event (the latter more likely).
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Mar 29 2007, 01:52 PM
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Special Cookie Group: Members Posts: 2168 Joined: 6-April 05 From: Sintra | Portugal Member No.: 228 |
I particulary enjoyed this paragraph from the PI's Perspective...:
"Onward we go, into the cold, yawning abyss that is the outer solar system, with our eyes, minds and hearts firmly fixed on our goal of a history-making scientific exploration of worlds where no one has gone before!" Alan Stern really knows how to give a special touch to his updated... -------------------- "Ride, boldly ride," The shade replied, "If you seek for Eldorado!"
Edgar Alan Poe |
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Mar 29 2007, 03:30 PM
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Member Group: Members Posts: 428 Joined: 21-August 06 From: Northern Virginia Member No.: 1062 |
I'm fairly impressed that this is the first safing event of NH. I know of at least 3 that have happened with MRO and I wouldn't be surprised if there was another one or two that happened before I joined the HiRISE team. Most were recovered in short order (Namely because the instruments were turned off. They actually occurred during aerobraking), but still... Good work NH team!
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Mar 29 2007, 04:04 PM
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
"exploration of worlds where no one has gone before!" Not only does he sound like a Star Trek fan, it appears he's partial to TNG. -------------------- If Occam had heard my theory, things would be very different now.
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