GOCE |
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GOCE |
 Apr 9 2009, 03:01 AM
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#16
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Member  Group: Members Posts: 173 Joined: 9-September 08 Member No.: 4334  |
And now the gravity instrument is on, too.
It looks like this will be doing very valuable science, though maybe not as immediately exciting as planetary exploration... |
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May 27 2009, 08:43 AM
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#17
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 Member Group: Members Posts: 345 Joined: 12-September 05 From: France Member No.: 495 |
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May 27 2009, 09:33 AM
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#18
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Junior Member Group: Members Posts: 25 Joined: 26-March 09 From: Cornwall Member No.: 4697 |
Not quite the "first" they claim, though. Beaten by three decades:
http://oai.dtic.mil/oai/oai?verb=getRecord...ifier=AD0766456 |
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May 27 2009, 03:08 PM
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#19
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 Senior Member Group: Members Posts: 2248 Joined: 15-January 05 From: center Italy Member No.: 150 |
Thanks for the info, gwiz! For Triad satellite, it seems they used traditional thrusters for compensatoin of non-gravitational forces, I wonder if is really effective like the continuous ion thruster...
Anyway, any link to the full article? PS: I'm really intrigued by the final phrase "A significant bias force is found acting in the local vertical direction." Pioneer effect again???  EDIT: I found this article telling that Triad residual acceleration is within 1e-11g... any info on the actual GOCE residual acceleration? (they only claim is 10-fold better than requested). -------------------- - Marco -
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May 27 2009, 03:36 PM
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#20
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Junior Member Group: Members Posts: 25 Joined: 26-March 09 From: Cornwall Member No.: 4697 |
QUOTE (dilo @ May 27 2009, 04:08 PM)  Anyway, any link to the full article? Can't find a free copy, but the link you found is probably comparable. |
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Jun 25 2009, 10:05 AM
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#21
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Newbie Group: Members Posts: 7 Joined: 26-June 05 Member No.: 419 |
i've heard that lowering the orbit did not go as well as planned; does anybody know if this is because of the unexpected solar minimum, and what, if any, are the resulting delays?
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Oct 1 2009, 09:13 PM
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#22
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 Senior Member Group: Members Posts: 2929 Joined: 4-November 05 From: North Wales Member No.: 542 |
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Oct 2 2009, 06:01 AM
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#23
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Senior Member Group: Members Posts: 1100 Joined: 14-October 05 From: Seattle Member No.: 530 |
ESA's got the bigger visual -- a nice reminder that I have a supervolcano in my back yard.
http://www.esa.int/images/gradient_picture.jpg Makes me wonder what the big sharp peaks in central africa are. From their version: http://www.esa.int/esaCP/SEMNBNKIWZF_index_0.html (Actually, I don't believe science daily did much other than add their own attribution.) |
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Jun 29 2010, 10:10 PM
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#24
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Senior Member Group: Members Posts: 1100 Joined: 14-October 05 From: Seattle Member No.: 530 |
New BBC article.
http://news.bbc.co.uk/2/hi/science/nature/8767763.stm Seems to be a differently balanced use of the same colors. Odd. And of course, the same releases available at the ESA page here: http://www.esa.int/SPECIALS/GOCE/index.html |
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Sep 3 2010, 08:55 PM
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#25
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Senior Member Group: Members Posts: 1100 Joined: 14-October 05 From: Seattle Member No.: 530 |
Interesting mission-extending software patching going on with GOCE:
http://spaceflightnow.com/news/n1008/29goce/ Apparently separate and different failures in discrete components of each redundant computer system is driving them to create software patches that use the functioning components of each computer to restore operations. Neat. |
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