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Huygens probe question |
  Mar 25 2006, 05:28 PM
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#1
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Junior Member  Group: Members Posts: 72 Joined: 22-December 05 Member No.: 616  |
Which device made the Huygens probe spin underneath its satellite?
I read that's the way how 360° images were made during descent... |
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| Guest_BruceMoomaw_* |
Mar 31 2006, 07:46 AM
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#2
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Guests |
More to the point, if the heat shield had broken away just before landing, Huygens would no doubt have swung like crazy from its parachute during the release -- but its attitude data before landing indicated that, after it got below the gusts of the stratosphere, it retained great stability throughout landing.
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Mar 31 2006, 08:52 PM
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#3
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Member Group: Members Posts: 624 Joined: 10-August 05 Member No.: 460 |
QUOTE (BruceMoomaw @ Mar 31 2006, 12:46 AM)  More to the point, if the heat shield had broken away just before landing, Huygens would no doubt have swung like crazy from its parachute during the release -- but its attitude data before landing indicated that, after it got below the gusts of the stratosphere, it retained great stability throughout landing. Bruce, that is my point. The attitude data show a baby nursing for the last hour-and-a-half of the descent, but the images clearly show Huygens reeling like a drunken sailor - Notice how the viewing angle of the circular feature (Pages 24-27) rotates ~50 degrees in azimuth, and moves from lens to lens, and this is clearly near the end of the descent. You can't tip the platform that much, and show nothing, naughta, on the accelerometers! http://esamultimedia.esa.int/docs/titanraw/file24a.html http://esamultimedia.esa.int/docs/titanraw/file25a.html http://esamultimedia.esa.int/docs/titanraw/file26a.html Larry Soderblom commented about this in an early Planetary Society article, but I can't pin it down. (The problem with Emily's prolific writing is my failure to build a useful index, seperating the science from the contests.) This article does talk about Huygens change in direction near the surface: http://www.nature.com/nature/journal/v438/...2AA41F084DD3D47 I have yet to see an accelerometer that does not show a change in direction as a change in accleration...except near the surface of Titan! |
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Mar 31 2006, 08:58 PM
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#4
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1 |
QUOTE (The Messenger @ Mar 31 2006, 08:52 PM) but the images clearly show Huygens reeling like a drunken sailor - We don't know which order those images go on. Ed's right - we need to have them in the right order to try and make a call on that. Doug |
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Steffen Huygens probe question Mar 25 2006, 05:28 PM
centsworth_II I believe the probe had fins attached that were to... Mar 25 2006, 05:39 PM BruceMoomaw Yeah, it had small vanes on the outer edges of its... Mar 25 2006, 10:11 PM Decepticon ^That works with me.
I never heard of the radio ... Mar 26 2006, 04:00 AM BruceMoomaw They had to do some careful checking of the antenn... Mar 26 2006, 05:44 AM Richard Trigaux Any object under a parachute rotates naturally. Th... Mar 26 2006, 08:45 AM BruceMoomaw See page 15 of Lebreton's article on Huygens (... Mar 26 2006, 11:02 AM BruceMoomaw That same diagram revealed something else that I h... Mar 26 2006, 11:52 AM
The Messenger QUOTE (BruceMoomaw @ Mar 26 2006, 04:52 A... Mar 28 2006, 03:56 PM BruceMoomaw In this connection, one COSPAR abstract seems to s... Mar 26 2006, 01:44 PM PhilCo126 Well, I'm still amazed how the Cassini-Huygens... Mar 28 2006, 03:38 PM djellison Do you not think that if the descent profile were ... Mar 28 2006, 04:09 PM The Messenger QUOTE (djellison @ Mar 28 2006, 09:09 AM)... Mar 28 2006, 05:05 PM BruceMoomaw "In principle, the water-ice value could have... Mar 28 2006, 08:07 PM The Messenger I talked to Dr. Waffle again last night, about hea... Mar 29 2006, 08:47 PM BruceMoomaw Unconvincing. Take a look at those three mass spe... Mar 30 2006, 04:28 AM The Messenger QUOTE (BruceMoomaw @ Mar 29 2006, 09:28 P... Mar 30 2006, 06:43 AM djellison Are you refering to this one?
http://esamultimedi... Mar 30 2006, 09:25 AM The Messenger QUOTE (djellison @ Mar 30 2006, 02:25 AM)... Mar 31 2006, 05:54 AM Big_Gazza These sections of Huygens descent imaging triads (... Mar 31 2006, 11:00 AM edstrick Big Gazza: "I'm sure these images have ca... Mar 31 2006, 11:49 AM The Messenger QUOTE (edstrick @ Mar 31 2006, 04:49 AM) ... Apr 1 2006, 09:42 PM BruceMoomaw QUOTE (The Messenger @ Apr 1 2006, 09:42 ... Apr 2 2006, 05:25 AM djellison QUOTE (The Messenger @ Apr 1 2006, 09:42 ... Apr 2 2006, 11:20 AM Bob Shaw Doug:
There *is* unambiguous evidence that the re... Apr 2 2006, 12:00 PM ugordan QUOTE (Bob Shaw @ Apr 2 2006, 01:00 PM) A... Apr 2 2006, 01:45 PM Bob Shaw QUOTE (ugordan @ Apr 2 2006, 02:45 PM) Yo... Apr 2 2006, 02:25 PM ugordan QUOTE (Bob Shaw @ Apr 2 2006, 03:25 PM) A... Apr 2 2006, 02:49 PM Bob Shaw QUOTE (ugordan @ Apr 2 2006, 03:49 PM) Th... Apr 2 2006, 02:55 PM The Messenger QUOTE (djellison @ Apr 2 2006, 05:20 AM) ... Apr 3 2006, 05:32 AM djellison Just throwing this one into the mix...
Did the la... Mar 31 2006, 12:02 PM edstrick Assuming my hypothesis is correct. the image BRIGH... Mar 31 2006, 12:27 PM BruceMoomaw It was instantly clear from looking at the photos ... Apr 1 2006, 09:28 AM djellison We're not after the sun - we just want to know... Apr 2 2006, 03:26 PM BruceMoomaw While it's certainly permissible that we don... Apr 2 2006, 07:45 PM djellison Point 1 is mute - channel A was lost. (and it was ... Apr 3 2006, 06:34 AM BruceMoomaw We got all the radar data (which started at 45 km ... Apr 3 2006, 01:24 PM |
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