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PFS issue on Venus Express, PFS scanner stuck in its closed position
Rakhir
post Mar 21 2006, 09:03 PM
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Bad news for PFS. I hope they will be able to solve this issue. sad.gif

The PFS scanner is stuck in its closed position.
Several attempts to move it were made at the time, but the instrument did not respond. Experts suspected a thermal problem by which low temperatures were blocking the rotation of the mechanism.
Another attempt to move the scanner was made on 16 March 2006, in warmer flight conditions. Unfortunately, the scanner remains stuck.

The next opportunity to perform another test on the spacecraft will be end of April, after the Venus Orbit Insertion.


From http://sci.esa.int/science-e/www/object/in...fobjectid=38964
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ljk4-1
post Mar 22 2006, 03:21 PM
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The Compton Gamma Ray Observatory almost didn't happen due to
the satellite's high-gain antenna being stuck by a wrapped-around
wire during its launch in April of 1991.

Fortunately for that mission, it had been sent up by the Space
Shuttle Atlantis (STS-37), so EVAing astronaut Jerry Ross was
able to fix the problem by hand after repeated commands from
the ground and even using the robot arm failed to do the trick.

http://en.wikipedia.org/wiki/STS-37


--------------------
"After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance.
I see that such intercourse long continued would make one thoroughly prosaic, hard,
and coarse. But the longest intercourse with Nature, though in her rudest moods, does
not thus harden and make coarse. A hard, sensible man whom we liken to a rock is
indeed much harder than a rock. From hard, coarse, insensible men with whom I have
no sympathy, I go to commune with the rocks, whose hearts are comparatively soft."

- Henry David Thoreau, November 15, 1853

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The Messenger
post Mar 22 2006, 05:27 PM
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QUOTE
It IS inappropriate to bring Iraq into it, to use a rather crude phrasology when refering to the Italians and to have a post that saying nothing but "Grrrrrrrrr"


As long as we all agree it is very frustrating to have yet another space mission placed in jeopardy because the spring in the Jack-in-the-box does not work.

QUOTE (ljk4-1 @ Mar 22 2006, 08:21 AM) *
The Compton Gamma Ray Observatory almost didn't happen due to
the satellite's high-gain antenna being stuck by a wrapped-around
wire during its launch in April of 1991.

Fortunately for that mission, it had been sent up by the Space
Shuttle Atlantis (STS-37), so EVAing astronaut Jerry Ross was
able to fix the problem by hand after repeated commands from
the ground and even using the robot arm failed to do the trick.

http://en.wikipedia.org/wiki/STS-37

In my next IR&D funding request, I am going to propose building a satellobit - a little dude with strong clasps and a good lever arm, who could wrestle with stubborn booms, valves, shields, clasps, whatever. Include one in every mission - even a robotic eye camera that could aid in the diagnose root causes would be helpful. We have got to pay more attention, money and weight allowances to system health assessment and managagement.
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Bob Shaw
post Mar 22 2006, 06:52 PM
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QUOTE (The Messenger @ Mar 22 2006, 05:27 PM) *
As long as we all agree it is very frustrating to have yet another space mission placed in jeopardy because the spring in the Jack-in-the-box does not work.
In my next IR&D funding request, I am going to propose building a satellobit - a little dude with strong clasps and a good lever arm, who could wrestle with stubborn booms, valves, shields, clasps, whatever. Include one in every mission - even a robotic eye camera that could aid in the diagnose root causes would be helpful. We have got to pay more attention, money and weight allowances to system health assessment and managagement.


I tend to agree - and in particular for the incredibly precise optical origami experiment known as the James Webb Space Telescope! Hubble didn't *really* need human attention (it's pretty obvious that it really needed a series of improved siblings, not a series of expensive upgrades) but JWST is s-o-o-o complicated in terms of the darn thing deploying that it really does need a hammer-wielding 'something' to be available, just in case. An astrobot would be fine, but a human would possibly be even better - and as a dry-run for some serious deep space Buck Rogers, what could be better than a mission to observe JWST deployment from a nice, safe distance, with the option of a repair / redeploy if required? If NASA doesn't want the job, put it out to competitive tender, and offer to fly some of the engineers who built the darn thing as Mission Specialists aboard a Dragon (or whatever). OK, it's not the cheapest way to run things, sending men out there - but the high price of a manned insurance mission is still pennies compared to the cost of JWST going down the sluice. If that happens, say cheerio to all those other fun big science missions...

Bob Shaw


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Remember: Time Flies like the wind - but Fruit Flies like bananas!
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Posts in this topic
- Rakhir   PFS issue on Venus Express   Mar 21 2006, 09:03 PM
- - AlexBlackwell   QUOTE (Rakhir @ Mar 21 2006, 09:03 PM) Ba...   Mar 21 2006, 09:19 PM
- - BruceMoomaw   No, I didn't anticipate it at all, and it...   Mar 21 2006, 09:36 PM
- - djellison   Boys - don't make me come in here!! I...   Mar 22 2006, 08:37 AM
|- - The Messenger   QUOTE (djellison @ Mar 22 2006, 01:37 AM)...   Mar 22 2006, 03:07 PM
|- - djellison   QUOTE (The Messenger @ Mar 22 2006, 03:07...   Mar 22 2006, 04:05 PM
|- - BruceMoomaw   QUOTE (djellison @ Mar 22 2006, 04:05 PM)...   Mar 22 2006, 08:15 PM
|- - Marz   QUOTE (BruceMoomaw @ Mar 22 2006, 02:15 P...   Mar 22 2006, 10:04 PM
||- - GravityWaves   QUOTE (Marz @ Mar 22 2006, 07:04 PM) Afte...   Mar 23 2006, 02:21 PM
||- - Borek   QUOTE (GravityWaves @ Mar 23 2006, 03:21 ...   Apr 5 2006, 07:02 PM
||- - djellison   QUOTE (Borek @ Apr 5 2006, 07:02 PM) You ...   Apr 5 2006, 07:05 PM
||- - ugordan   High Resolution channel being out of focus or not,...   Apr 5 2006, 07:06 PM
|- - djellison   QUOTE (BruceMoomaw @ Mar 22 2006, 08:15 P...   Mar 22 2006, 10:31 PM
|- - The Messenger   QUOTE (djellison @ Mar 22 2006, 03:31 PM)...   Mar 23 2006, 04:06 PM
|- - JRehling   QUOTE (The Messenger @ Mar 23 2006, 08:06...   Mar 23 2006, 07:31 PM
- - deglr6328   I am only able to remember one instance where a st...   Mar 22 2006, 09:13 AM
|- - tty   QUOTE (deglr6328 @ Mar 22 2006, 10:13 AM)...   Mar 22 2006, 12:22 PM
|- - tedstryk   QUOTE (deglr6328 @ Mar 22 2006, 09:13 AM)...   Mar 23 2006, 03:14 PM
|- - tasp   QUOTE (deglr6328 @ Mar 22 2006, 03:13 AM)...   Mar 24 2006, 01:26 AM
- - edstrick   Mariner 10 venus/mercury had two solar wind instru...   Mar 22 2006, 11:14 AM
- - ljk4-1   The Compton Gamma Ray Observatory almost didn...   Mar 22 2006, 03:21 PM
|- - The Messenger   QUOTE It IS inappropriate to bring Iraq into it, t...   Mar 22 2006, 05:27 PM
|- - Bob Shaw   QUOTE (The Messenger @ Mar 22 2006, 05:27...   Mar 22 2006, 06:52 PM
|- - djellison   QUOTE (The Messenger @ Mar 22 2006, 05:27...   Mar 22 2006, 06:58 PM
|- - AlexBlackwell   QUOTE (djellison @ Mar 22 2006, 06:58 PM)...   Mar 22 2006, 07:05 PM
- - BruceMoomaw   Did I happen to mention the central relevance of t...   Mar 23 2006, 01:34 AM
- - djellison   For those that have not seen the BBC series 'T...   Mar 23 2006, 03:29 PM
- - djellison   There is no commonality between the aparant failur...   Mar 23 2006, 04:46 PM
|- - GravityWaves   QUOTE (djellison @ Mar 23 2006, 01:46 PM)...   Mar 25 2006, 05:24 PM
|- - The Messenger   QUOTE (djellison @ Mar 23 2006, 09:46 AM)...   Mar 25 2006, 05:42 PM
- - hendric   I've wondered if missions shouldn't start ...   Mar 23 2006, 04:49 PM
|- - AlexBlackwell   QUOTE (hendric @ Mar 23 2006, 04:49 PM) I...   Mar 23 2006, 04:56 PM
|- - ljk4-1   QUOTE (hendric @ Mar 23 2006, 11:49 AM) I...   Mar 23 2006, 05:23 PM
- - djellison   Woudlnt it make more sense to simply spend the tim...   Mar 23 2006, 05:30 PM
- - BruceMoomaw   Well, you know, constant repetition is a very impo...   Mar 23 2006, 09:30 PM
|- - dvandorn   QUOTE (BruceMoomaw @ Mar 23 2006, 03:30 P...   Mar 24 2006, 12:47 AM
|- - BruceMoomaw   QUOTE (dvandorn @ Mar 24 2006, 12:47 AM) ...   Mar 24 2006, 02:16 AM
|- - AlexBlackwell   QUOTE (BruceMoomaw @ Mar 24 2006, 02:16 A...   Mar 24 2006, 02:20 AM
- - Decepticon   Do we know 100% that the instrument has failed? M...   Mar 24 2006, 03:15 AM
- - BruceMoomaw   That's just what we've been talking about ...   Mar 24 2006, 06:12 AM
- - BruceMoomaw   I'm somewhat inclined to be forgiving where mo...   Mar 25 2006, 09:50 PM
|- - Bob Shaw   QUOTE (BruceMoomaw @ Mar 25 2006, 09:50 P...   Mar 25 2006, 10:20 PM
|- - djellison   QUOTE (BruceMoomaw @ Mar 25 2006, 09:50 P...   Mar 25 2006, 10:40 PM
- - BruceMoomaw   I would have loved the robotic Hubble mission IF T...   Mar 26 2006, 03:48 AM
|- - djellison   Not that much cheaper if you wanted to do anything...   Mar 26 2006, 10:03 AM
- - BruceMoomaw   In most repair cases, yeah. But occasionally you...   Mar 27 2006, 07:16 AM
- - BruceMoomaw   I've E-mailed Formisano to ask him when the ne...   Apr 12 2006, 11:05 PM
|- - Rakhir   Bruce, I've e-mailed him just after the VOI ...   Apr 13 2006, 07:04 AM
- - RNeuhaus   Thanks much Rakhir for the pointing topic. I was ...   Apr 15 2006, 01:49 PM
|- - djellison   QUOTE (RNeuhaus @ Apr 15 2006, 01:49 PM) ...   Apr 15 2006, 02:51 PM
|- - Bob Shaw   Doug: Just give up on unmanned spacecraft, and ma...   Apr 15 2006, 03:00 PM
||- - nprev   QUOTE (Bob Shaw @ Apr 15 2006, 08:00 AM) ...   Apr 16 2006, 12:33 AM
|- - RNeuhaus   QUOTE (djellison @ Apr 15 2006, 09:51 AM)...   Apr 15 2006, 03:22 PM
- - BruceMoomaw   Weight-wise and expense-wise, it would make MUCH m...   Apr 15 2006, 10:38 PM
|- - JRehling   QUOTE (BruceMoomaw @ Apr 15 2006, 03:38 P...   Apr 16 2006, 04:36 AM
|- - tty   QUOTE (JRehling @ Apr 16 2006, 06:36 AM) ...   Apr 16 2006, 04:45 PM
- - BruceMoomaw   I'm not sure I'd go THAT far -- that would...   Apr 16 2006, 08:44 AM
- - Rakhir   Emily reported in her blog that the VEX team manag...   May 2 2006, 07:00 AM
- - Sunspot   Well its not like the public are ever going to get...   May 2 2006, 11:57 AM
|- - The Messenger   QUOTE (Sunspot @ May 2 2006, 05:57 AM) We...   May 2 2006, 03:08 PM
|- - DonPMitchell   It is bad news. The Fourier spectrometer was very...   May 6 2006, 05:11 PM
|- - djellison   QUOTE (DonPMitchell @ May 6 2006, 06:11 P...   May 6 2006, 06:28 PM
|- - dvandorn   QUOTE (DonPMitchell @ May 6 2006, 12:11 P...   May 7 2006, 07:23 AM
|- - The Messenger   QUOTE (DonPMitchell @ May 6 2006, 11:11 A...   May 7 2006, 07:56 PM
|- - Bob Shaw   QUOTE (The Messenger @ May 7 2006, 08:56 ...   May 7 2006, 08:30 PM
- - sawyer   I've thought that a very smaller crawler robot...   May 2 2006, 03:02 PM
- - BruceMoomaw   Tentative good news on the PFS mirror front from ...   May 8 2006, 01:51 PM
- - BruceMoomaw   Glum news on the subject from the May 22 Aviation ...   May 31 2006, 05:51 AM
|- - DonPMitchell   QUOTE (BruceMoomaw @ May 30 2006, 10:51 P...   May 31 2006, 05:46 PM
- - ljk4-1   Any chance they could use the probe's thruster...   May 31 2006, 03:05 PM
- - gpurcell   I sense PFS Discovery proposal memos being generat...   May 31 2006, 09:54 PM
- - BruceMoomaw   It might be possible to add such a spectrometer to...   May 31 2006, 10:54 PM
|- - gpurcell   QUOTE (BruceMoomaw @ May 31 2006, 10:54 P...   Jun 1 2006, 01:43 PM
|- - JRehling   Messenger has two spectrometers and is making a fl...   Jun 1 2006, 04:16 PM
|- - BruceMoomaw   QUOTE (gpurcell @ Jun 1 2006, 01:43 PM) B...   Jun 1 2006, 10:46 PM
|- - centsworth_II   QUOTE (BruceMoomaw @ Jun 1 2006, 06:46 PM...   Jun 2 2006, 02:54 AM
- - ljk4-1   If someone could clarify for me: What could be do...   Jun 5 2006, 02:37 PM
|- - DonPMitchell   QUOTE (ljk4-1 @ Jun 5 2006, 07:37 AM...   Jun 5 2006, 08:06 PM
|- - ljk4-1   QUOTE (DonPMitchell @ Jun 5 2006, 04:06 P...   Jun 5 2006, 08:09 PM
|- - JRehling   QUOTE (ljk4-1 @ Jun 5 2006, 01:09 PM...   Jun 5 2006, 08:31 PM
- - DonPMitchell   FYI, here is the hubble photo of Venus. I dug up ...   Jun 5 2006, 09:27 PM
- - The Messenger   Notta about the PFS in the latest ESA press releas...   Jun 27 2006, 01:29 PM
|- - ustrax   QUOTE (The Messenger @ Jun 27 2006, 02:29...   Jun 27 2006, 01:34 PM
- - Rakhir   Current planning does not forsee any PFS testing u...   Jul 21 2006, 03:05 PM
- - PhilHorzempa   I have it, from a Brilliant Reliable Unmanned Craf...   Jul 24 2006, 03:57 AM
|- - stevesliva   QUOTE (PhilHorzempa @ Jul 23 2006, 11:57 ...   Sep 18 2006, 08:09 PM
- - AlexBlackwell   PFS is still off according to the latest VEx updat...   Sep 7 2006, 10:29 PM
|- - JRehling   Messenger will fly by Venus in six weeks. Does any...   Sep 7 2006, 11:14 PM
|- - AlexBlackwell   QUOTE (JRehling @ Sep 7 2006, 01:14 PM) M...   Sep 7 2006, 11:19 PM
|- - JRehling   QUOTE (AlexBlackwell @ Sep 7 2006, 04:19 ...   Sep 8 2006, 01:54 AM
- - Rakhir   A hardware safe occured while the PFS was ON (addi...   Oct 6 2006, 08:56 AM
- - Rakhir   Still no news in the 10 october status report conc...   Oct 10 2006, 04:03 PM


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