Beagle 2 in HiRISE, Possible Targets |
Beagle 2 in HiRISE, Possible Targets |
Feb 14 2007, 05:04 PM
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
EDIT: Moved these posts from the Feb 14 HiRISE Release thread to here to collect all Beagle 2 search related stuff in one place.
I'm downloading them now too -- guess I can't blog about them until I've examined them very carefully! For a bit of history on the search, Here's a blog entry I wrote about this spot a while ago Here's the MOC team's take on that spot And here's the BBC page with the Beagle 2 team's take on it EDIT: and here's my updated blog entry with links to the Beagle 2 landing ellipse images split up into 40-MB chunks. --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Guest_Sunspot_* |
Dec 17 2008, 08:23 PM
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Guests |
Beagle 2 may have tumbled to a fiery doom
http://www.newscientist.com/article/mg2002...fiery-doom.html |
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Jan 2 2009, 11:54 AM
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
Beagle 2 may have tumbled to a fiery doom http://www.newscientist.com/article/mg2002...fiery-doom.html Journal of Spacecraft and Rockets paper now available for free See the AIAA siteof the journal under Sample Issue. There is also a paper on Stardust's reentry available for free |
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Jan 2 2009, 03:05 PM
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#4
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Member Group: Members Posts: 613 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
Journal of Spacecraft and Rockets paper now available for free Readers might also be interested in a review I did a couple of years ago on spin of planetary probes (emphasis was on descent, rather than entry, but it touches on it and summarizes the various spin rates and spin-separation-umbilical designs used. http://www.lpl.arizona.edu/~rlorenz/spinjbis.pdf I have to say in the process of researching this, I find it very difficult to find *pre-Mission* calculations of release spin rates for entry vehicles. Notionally the spin rate should be chosen based on angle of attack tolerance at the entry interface (which in turn depends on targeting accuracy, as well as the moment of inertia, the expected disturbance torques and the coast time) as well as dynamic stability during the entry itself (the subject of this paper). While there are always post-mission reconstructions etc., I haven't come across a paper saying 'This is the spin rate we chose and this is why'. (Maybe because of fear one gets it wrong..?) This Beage/J.Spacecraft paper may be getting more attention than it deserves - I can't see any obvious problems with it, but the main message is 'look, here is a simulation that diverges in the transition regime'. It would be more useful to show that the same simulation code yields survivable entries for MPF, MER etc., and to show what the 'correct' spin rate for Beagle should have been (if, indeed, any spin rate would have worked....) A complex problem, verging (as another poster noted) on a black art. |
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