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djellison
Posted on: May 27 2006, 08:56 AM


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If you go to 'my controls' top right, and then go to 'manage my attachments'
(I think a direct link would be http://www.unmannedspaceflight.com/index.p...rCP&CODE=attach )

You can see it all there

Doug
  Forum: Past and Future · Post Preview: #55944 · Replies: 85 · Views: 92185

djellison
Posted on: May 27 2006, 07:39 AM


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QUOTE (Richard Trigaux @ May 27 2006, 08:30 AM) *
But things will change, and it will require sooner or later a better technical direction, together with a common economical/political management in a form or another.
...
By the way, ESA used the DSN, but MERs used the european Mars satellite as a relay.



On the first point - I don't see any change. Those 'doing space' are developing the resources to talk their assets. The DSN needs more cash for maintainance and upgrading, but it doesnt require external management. To be honest, demanding an external body manages the DSN is a bit like a kid trying to steal someone elses sweets.

And MER used Mars Express as little more than a tech-demo to check compatability and functionality of the UHF payload on MEX - as a percentage of data returned, MEX would be considerably less than a percentage point.

Doug
  Forum: Exploration Strategy · Post Preview: #55942 · Replies: 33 · Views: 35496

djellison
Posted on: May 27 2006, 07:05 AM


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ESA is slowly getting there with a DSN of it's own...
http://www.esa.int/spacecraftops/Image/url..._section3_l.jpg

Also - just looking at the GAO report - they only visited Goldstone...no site visits for Spain or Aus which seems a bit of a half-arsed job to be honest.

Doug
  Forum: Exploration Strategy · Post Preview: #55939 · Replies: 33 · Views: 35496

djellison
Posted on: May 27 2006, 07:02 AM


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I've always thought the sun shone out of a different part of my anatomy smile.gif

Doug
  Forum: Chit Chat · Post Preview: #55938 · Replies: 299 · Views: 174526

djellison
Posted on: May 27 2006, 07:00 AM


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QUOTE (PhilCo126 @ May 26 2006, 08:22 PM) *
Doug, what's the limit on image size here for attachments?


1 meg. And a member has a total budget for all their messages. Attachment's are the actual limiting factor for hosting - we're nearly at the 1gb level as it is and purely for long term sustainability, I have to keep a tight rope on them.

Doug
  Forum: Past and Future · Post Preview: #55937 · Replies: 85 · Views: 92185

djellison
Posted on: May 27 2006, 06:57 AM


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Thought I'd share this which I wizzed over to Emily last night...

"
Right ….

I started with this…

http://www.msss.com/mars_images/moc/2004/01/24/



That ellipse is about 87km long, 11km wide – I’m not sure which ellipse that is ( final targeted ellipse after final TCM, or the launch ellipse…it might be worth pinging someone at MER HQ to see if they know exactly where that one came from – but it’s the one we used on the forum )



Going from an estimated centre of that ellipse - the actual landing is, by my maths, 23km downtrack, and 0.4km right of the centre line – with the MER entry trajectory coming from the left.



Using this…

http://www.planetary.org/image/oppo-stooke-map.jpg



(I can’t WAIT for HiRISE imagery)





And this

http://www.unmannedspaceflight.com/index.p...pe=post&id=4907



I would estimate that the southern edge of the landing ellipse was between 4200 and 4400 metres south of the landing site, and crossed at some point between 760 and 773



Sol 760 Odom was 6682m, sol 773 Odom was 7249m….I wouldn’t want to try and drag in either of those sol numbers or distances driven – we did our best overlaying that MSSS image ( the larger 10m res one is available at the bottom of the page linked up the top of this email ) onto the route maps that people have done – but we’re not really sure – so that’s the sort of ‘max range’ based on what we have. There might be an MER person who knows more accurately."


[/size]

When you think about it - they got a bit of a downrange distance on both of them due to the atmospheric conditions, but they were both VERY close to centre line which is the real gauge of their accuracy in targetting...400m or so for Opportunity is utterly astonishing.







[size="2"]Doug
  Forum: Opportunity · Post Preview: #55936 · Replies: 3597 · Views: 3531676

djellison
Posted on: May 26 2006, 08:14 PM


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Truth be told, I could go even further and say that the generosity with which DSN facilities have been made available to ESA could justify in some way a contribution from those nations...of course it's very give and take with things like this - you scratch our back..we'll scratch yours etc.

One thing that I've thought of...there was a detailed breakdown of estimated DSN costs for missions in the recent as a function of number of contacts per week, length of contacts, and facility size required etc in available in the library of the current Discovery AO
http://discovery.larc.nasa.gov/PDF_FILES/N...S-Update061.pdf

I'm not sure how the funding for a facility like this works - but I presume it's income is both from funding on a mission by mission basis as outlined in that doc, and also general DSN funding from NASA that's for maintainance and upgrades as opposed to normal running costs.

Perhaps one or the other needs a bit of a hike.

Doug
  Forum: Exploration Strategy · Post Preview: #55898 · Replies: 33 · Views: 35496

djellison
Posted on: May 26 2006, 07:44 PM


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There is already international involvement to some extent, with ESA building smaller facilities of it's own in various places.

There is no way in hell the UN should ever have control over the DSN. The US built it, the US use it, the US pay for it.

Doug
  Forum: Exploration Strategy · Post Preview: #55894 · Replies: 33 · Views: 35496

djellison
Posted on: May 26 2006, 06:22 PM


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Were there any problems w.r.t. politicis, one could simply use a large ex-oil-facility such as they use for Sea Launch - pointing might be a bit of a problem in heavy seas - but it would be a hell of a lot cheaper and easier than an orbital facility.

But of course we're missing the point. We don't need any of this and the huge budget it would require..what we need is a more moderate investment in the current DSN.


Doug
  Forum: Exploration Strategy · Post Preview: #55876 · Replies: 33 · Views: 35496

djellison
Posted on: May 26 2006, 03:28 PM


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QUOTE (Jim from NSF.com @ May 26 2006, 12:44 PM) *
an orbital system could work without the international implications.


Would cost an extraordinary ammount of money, would still require a groundstation, and would be impossible to improve over time.

Doug
  Forum: Exploration Strategy · Post Preview: #55853 · Replies: 33 · Views: 35496

djellison
Posted on: May 25 2006, 06:48 AM


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QUOTE (CosmicRocker @ May 25 2006, 05:41 AM) *
Does anyone know which, if any, MER cameras/filters are most similar to MOC?


Unfiltered (L1) or Navcam smile.gif

Doug
  Forum: Spirit · Post Preview: #55667 · Replies: 603 · Views: 379795

djellison
Posted on: May 25 2006, 06:46 AM


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As it left the pad, I noticed how 'singed' all the first stage insulation looked - more than half the height of the first stage was brown and black. Because of the GEM's - one couldn't really see if the insulation around the base of the first stage was burning as it did with an earlier Delta IV however.

Doug
  Forum: Earth Observations · Post Preview: #55665 · Replies: 13 · Views: 15335

djellison
Posted on: May 24 2006, 02:58 PM


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On a quad - that's GENIUS - hmm...going to have to think of something. Would it look out of place if I was sailing a dingy on Ullswater...after all, Gusev USED to be a lake smile.gif
http://www.lakesail.co.uk/home/index.asp?scid=4

Doug
  Forum: Chit Chat · Post Preview: #55561 · Replies: 299 · Views: 174526

djellison
Posted on: May 24 2006, 01:31 PM


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What one does is work out a range to a feature in both pre-drive ( i.e. yestersol) and post drive ( tosol ) imagery, and the difference is the distance covered.

Doug
  Forum: Opportunity · Post Preview: #55550 · Replies: 1472 · Views: 708277

djellison
Posted on: May 24 2006, 01:17 PM


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Well - give them twice as much money to have twice as many people so they can shift work a full 24/7 schedule and I'm sure the MER team would be only to pleased.

It's a lack of taxpyers funds that mean they have to maintain a skeleton crew.

Or would you rather the scientists and engineers actually work 7 days a week, 365 days a year, on Martian time, for two and a half years without a break?

The Tax Payers money was $850M for two 90 sol missions. They got that - operating a full 24/7 crew. Now - for approx another $50M - they've had a further 750ish sols out of each rover.

Wasting tax payers money? It's the bargin of the century!

Doug
  Forum: Spirit · Post Preview: #55546 · Replies: 175 · Views: 198975

djellison
Posted on: May 24 2006, 10:29 AM


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These might be usefull
http://www.unmannedspaceflight.com/index.p...pic=2456&hl=VST

http://www.unmannedspaceflight.com/index.p...pic=2380&hl=VST


Doug
  Forum: Tech, General and Imagery · Post Preview: #55532 · Replies: 197 · Views: 388447

djellison
Posted on: May 23 2006, 10:09 PM


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WOW - the ACTUAL STARDUST CAPSULE - it looks in amazing shape really...not too bad at all!

Doug
  Forum: Chit Chat · Post Preview: #55484 · Replies: 90 · Views: 68792

djellison
Posted on: May 23 2006, 02:17 PM


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Helen ( Member #2 ) and I ( Member #1 ) are off to the Lake District in 10 days time, so I'm waiting for then to get an appropriate sort of picture for the montage...hopefully we'll meet up with Stu and get him on board as well biggrin.gif

Emily probably wouldn't be overjoyed with a picture right now being on the montage for all time being at T-80 odd days.

Doug
  Forum: Chit Chat · Post Preview: #55408 · Replies: 299 · Views: 174526

djellison
Posted on: May 23 2006, 11:52 AM


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Massive solar arrays, lots of delicate instruments....if I was a PI on Rosetta, I'd be astonishingly wary of doing this at all. Even if the threat of a damaging impact because of a low impact speed isn't too bad - the potential to contaminate solar arrays and instruments remains high..even with near zero relative velocity.,

Maybe an impactor done a few months before arrival....but certainly nothing once it's arrived

Consider the HST images - that ejecta ended up covering a VAST area around the previous DI impact.

I would be astonished if the Rosetta guys were happy with this, even more so if the mission were selected.

Doug
  Forum: Cometary and Asteroid Missions · Post Preview: #55389 · Replies: 47 · Views: 53370

djellison
Posted on: May 23 2006, 11:39 AM


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Nope - nothing to do with software updates or identifying changes etc - it's studying the same patch of ground in different lighting conditions as mentioned in the last PC update.

This is L2&7 - remember that very low sun mosaic that we so popular..that was L2&7 as well ....and I'm sure there will be others.

Doug
  Forum: Spirit · Post Preview: #55386 · Replies: 603 · Views: 379795

djellison
Posted on: May 23 2006, 07:48 AM


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Pete just stood there...I wonder how many people had any idea who he was or what he'd done - did you get a chance to say hi?

Doug
  Forum: Chit Chat · Post Preview: #55364 · Replies: 90 · Views: 68792

djellison
Posted on: May 23 2006, 07:47 AM


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I said near rim back when I didn't know it was just the beaconey thing at the time smile.gif

Doug
  Forum: Opportunity · Post Preview: #55363 · Replies: 778 · Views: 414939

djellison
Posted on: May 23 2006, 07:26 AM


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QUOTE (Bobby @ May 23 2006, 08:01 AM) *
Please pressure these 3 to make a Vote by May 25...


Why? Truth be told, the only currently 100% honest answer is that we don't know - we don't have the right sort of data, we're not close enough to make a clear cut call. I've not seen anything that makes it obvious, and until I do - I won't get off the fence.

Doug
  Forum: Opportunity · Post Preview: #55359 · Replies: 778 · Views: 414939

djellison
Posted on: May 23 2006, 07:23 AM


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Is NASA HQ is really going to select a mission from which the bulk of the science is done by a foreign spacecraft with foreign instruments and foreign PI's? I'm sure there's plenty of US involvement within Rosetta - but I can't see the cheque-writers going for it in any way.

Furthermore - the ejecta would surely be a big risk for Rosetta, look at the HST images from the first DI, and any damage caused would of course have been entirely predictable and obvious eh Bruce. smile.gif

Doug
  Forum: Cometary and Asteroid Missions · Post Preview: #55357 · Replies: 47 · Views: 53370

djellison
Posted on: May 22 2006, 03:47 PM


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I am a BAA member - give me some specifics and I'll try and get to the BAA library next time I'm down with my laptop+scanner

Dorp me an email with the Info phil, and I'll see what I can do.

Doug
  Forum: Mercury · Post Preview: #55284 · Replies: 116 · Views: 419359

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