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Unmanned Spaceflight.com > All posts by a member| Posted on: Mar 26 2006, 10:08 AM | |
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Founder  Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1 
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I look forward to Musk getting it right on the 2nd or 3rd attempt and proving Bell wrong. Doug |
| Forum: Private Missions · Post Preview: #47686 · Replies: 511 · Views: 310795 |
| Posted on: Mar 26 2006, 10:03 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Not that much cheaper if you wanted to do anything of any value - if you wanted a chance of it working.. You would need dexterity, very very fine manouverability....and let's face it.....just launching a replacement's probably going to be cheaper  Doug |
| Forum: Venus Express · Post Preview: #47685 · Replies: 91 · Views: 187959 |
| Posted on: Mar 25 2006, 10:40 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (BruceMoomaw @ Mar 25 2006, 09:50 PM)  or you can interpret it to mean that we need small orbiting emergency-repair robots capable of tugging on stuck parts. You mean something in the style of the robotic hubble mission which you love to hate Doug |
| Forum: Venus Express · Post Preview: #47614 · Replies: 91 · Views: 187959 |
| Posted on: Mar 25 2006, 10:38 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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They're not that similar really. Ignore the 'outer' circle - every crater has that - and all that's similar between them on the inside is the evidence of a lower layer, with a bias to one side. That's all really. Doug |
| Forum: MRO 2005 · Post Preview: #47613 · Replies: 224 · Views: 152033 |
| Posted on: Mar 25 2006, 08:53 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (RGClark @ Mar 25 2006, 08:01 PM) I believe that daytime temperatures alone with the presence of salts are sufficient to melt this ice seasonally. So where are the lakes, bogs, the mud, to put it bluntly - the evidence for it? Because this isnt it - this is just dry dust being dragged through. And why do all the leading authorities on Mars disagree with you? What astonishing revelation have you discovered which they have overlooked? ODug |
| Forum: Spirit · Post Preview: #47591 · Replies: 260 · Views: 197466 |
| Posted on: Mar 25 2006, 07:01 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (Phil Stooke @ Mar 25 2006, 06:37 PM) I have only just discovered this thread - don't let it die! - so, OK, I will get my photo organized... and let's hope we can still do it. I am also hoping to be in the UK late June/early July, visiting family. Phil Oo - which bits of the UK? Doug |
| Forum: Chit Chat · Post Preview: #47582 · Replies: 299 · Views: 174526 |
| Posted on: Mar 25 2006, 07:00 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Vortex like aeolian work from prevailing wind and local topography combined with similar sub surface layering? Doug |
| Forum: MRO 2005 · Post Preview: #47581 · Replies: 224 · Views: 152033 |
| Posted on: Mar 25 2006, 05:20 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (RGClark @ Mar 25 2006, 04:29 PM) Now imagine these twenty pound wheels, warmer than surrounding temperatures, scraping across snowflakes on the ground. Bob Clark Let's go totally and utterly nuts - let's say the temperature increase is as much as 5 degrees ( I doubt it would be 1/10th of that) You're only raising things to a temperature they would have exceeded, regularly, for prolonged periods, all summer. If you're suggestion is that wheel friction is causing an increase in temperature of a few degrees, thus melting ice content of the soil, then that same ice would have been melted just by the warmer temperature of the summer, for hundreds of sols, across the whole planets equatorial regions. Doug |
| Forum: Spirit · Post Preview: #47549 · Replies: 260 · Views: 197466 |
| Posted on: Mar 25 2006, 04:27 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (mars loon @ Mar 25 2006, 04:04 PM) Did the blanket play a role? Was the engine damaged? Did the nozzle fail? Tune in next week to find out..... (sorry - it just sounded like it needed that )I think getting a better Oxygen farm onto the island will now become a matter of urgency, so they can produce enough to support the boil off during tanking. Doug |
| Forum: Private Missions · Post Preview: #47541 · Replies: 511 · Views: 310795 |
| Posted on: Mar 25 2006, 04:19 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (alan @ Mar 25 2006, 04:10 PM) 46 images down from spirit, I guess this means that Odyssey is back. Or they just did a 4 hr DTE HGA pass and her battery's now flat The same site at which you can get UHF session data, also has uplink data for Odyssey. It's not up to date yet, but this is what was done last time Odyssey safed. CODE 0796506249:0 2005-087T19:40:39 ci2997 d:/seq/crc_check_file_seq_pt1 RELATV CF6DDCD5 0796584494:1 2005-088T17:24:44 ci2998 d:/seq/crc_check_file_seq_pt2 RELATV CCA359FA 0797013133:8 2005-093T16:28:43 ci2262 d:/seq/safe_mode_daily_diagnostics RELATV 47A47FFE 0797091539:9 2005-094T14:15:29 ci2262 d:/seq/safe_mode_daily_diagnostics RELATV 47A47FFE 0797188568:1 2005-095T17:12:37 ci3007 d:/seq/rexmit_050405_upgo RELATV 3C447CF7 0797189118:1 2005-095T17:21:47 ci2262 d:/seq/safe_mode_daily_diagnostics RELATV 47A47FFE 0797197803:1 2005-095T19:46:32 ci2698 d:/seq/heap_reinit RELATV 53EA825F 0797203805:1 2005-095T21:26:34 ci3005 d:/seq/map_sm_recovery_upgo RELATV 939F56E1 0797268565:2 2005-096T15:25:54 ci2951 d:/seq/map_sm_recovery_reinits RELATV F115581C Doug |
| Forum: Spirit · Post Preview: #47540 · Replies: 260 · Views: 197466 |
| Posted on: Mar 25 2006, 04:11 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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I've always thought it was 2 that was the most widely accepted theory? I'm sure Phil can fill us in though being a small-body-guru . My un-pro take on thigs ; Deflection by jovian gravity could put a small asteroid into an orbit whereby a close slow flyby of Mars would result in a capture. Over millions of years - just about any orbit ends up being near circular and equatorial. They are in decaying orbits - they wont be around for many hundreds of millions of years - so I don't think they could have formed when the planet did or that process would have already occured. If they accreted from ejecta, a coming together of debris would produce a loose rubble pile - then Phobos surely wouldnt be strong enough to have withstood the impact that caused Stickney? Interesting debate all the same Doug |
| Forum: Mars · Post Preview: #47538 · Replies: 61 · Views: 156225 |
| Posted on: Mar 25 2006, 03:59 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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The easy answer is that they're not the same pixel resolution. Doug |
| Forum: MRO 2005 · Post Preview: #47532 · Replies: 224 · Views: 152033 |
| Posted on: Mar 25 2006, 03:57 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Under 1/3rdG , we're talking less than 10kg per wheel, spread over something like 50-100 sqcm. Take a 10kg weight, drag it thru sand, very very slowly, and the net result is NOTHING. If there's any heating at all, I'd be astonished if it was more than a single degree. To suggest that the friction of wheel drag would cause heating to generate liquid state water is just silly. Consider the daily temperature swing, it's already 50 degrees+, and if you include the fact that we're approaching winter - then we'd have had much warmer temperature in the last 300 sols than anything the frankly laughable concept of wheel drag temperature increases. If one or two degrees now can liberate liquid water onto the surface - then Gusev would have been a muddy bog for the past 300 sols. You're just grabbing at straws. Doug |
| Forum: Spirit · Post Preview: #47531 · Replies: 260 · Views: 197466 |
| Posted on: Mar 25 2006, 09:54 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (mcaplinger @ Mar 25 2006, 12:54 AM) I have to give the HiRISE team credit, this image is very nice. Now.... Now now now, 5 of the 8 cameras at Mars Orbit are MSSS instruments (for those that don't keep count. MOC NA, MOC WA, Themis Vis, CTX and MARCI from MSSS, Themis IR, HRSC and HiRISE are not ) - and they all contribute to the bigger picture in valuable and different ways Let some one else have some fun  (although I admit - occasionally I got MOC Gallery browsing just for fun, and not once I've I randomly clicked around and not found something that's made me go "Woah!" ) Anyhoo - the MOC image mentioned above, and the bottom corner of the HiRISE image Tried to match MOC onto HiRISE, then I realised that the MOC image is the one projected to a proper orientation, so I then matched HiRISE onto that instead. Doug |
| Forum: MRO 2005 · Post Preview: #47508 · Replies: 224 · Views: 152033 |
| Posted on: Mar 25 2006, 09:10 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (CosmicRocker @ Mar 25 2006, 06:54 AM) If there were significant water molecules this close to the surface and this close to the equator, they would have been detected by the orbiters, wouldn't they have? EXACTLY - and Odyssey hasn't done that. Nick has it right. [/color] QUOTE [color="black"]If more or less any random bit of Mars had saturated brines a few cm below the surface then there would be wetter areas with standing brine pools - lakes, streams, swamps and the like. The atmosphere of Mars is WAY too dry for that scenario - just the shallow brine would totally saturate the atmosphere through diffusion. Then you have to look at how the brine would be restored? It may "look" like mud, but there's no way it can actually *be* mud. Focussing on your desires and hopes rather than scientific reality may be warm and cosy but it's totally incorrect and will lead you up a long and painful blind alley. Mars is a very difficult planet to comprehend because [bold]it is not Earth-like[/bold]. All our human instincts and ideas are irrevocably shaped by our birth, education, and multi-million year Mammalian evolution on Earth. It is a hard buit profitable exercise to think yourself outside of that box. If you persist in believing only your eyes and your instincts, you will never understand Mars. http://www.habitablezone.com/nexus/index.asp?svcpt=space Personally - I see no evidence other that 'it looks a bit like mud' - and good scientific reasoning that it can't be. It's a no brainer.If it WERE such a material - where's the cohesion to the wheels? Doug |
| Forum: Spirit · Post Preview: #47506 · Replies: 260 · Views: 197466 |
| Posted on: Mar 25 2006, 09:03 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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You're asking Opportunity to be 'let loose' Slippage detection involves stopping every X metres, commanding a short drive, verifying progress with Visidom and then continuing the drive. Autonav and Blind Driving just don't cut it in this sort of terrain any more. Doug |
| Forum: Opportunity · Post Preview: #47504 · Replies: 3597 · Views: 3531676 |
| Posted on: Mar 25 2006, 09:01 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Just a thought - would RAL png's be a suitable radiometricly calibrated alternative to the FFL's? Doug |
| Forum: Tech, General and Imagery · Post Preview: #47503 · Replies: 42 · Views: 46078 |
| Posted on: Mar 24 2006, 11:56 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Things like google video will let you host it. Doug |
| Forum: Private Missions · Post Preview: #47464 · Replies: 511 · Views: 310795 |
| Posted on: Mar 24 2006, 11:55 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Well - MOC imagery would exceed this resolution - but we've not found any overlapping parts yet. It's bound to be in some Themis VIS images at 18m/pixel though - to this HiRISE imagery is 6x better than that. This imageyr is utterly superb news not because of the image itself, but because it means the camera works properly, in the right sort of environment, doing what it was designed to do. It means that, aerobraking allowing, we're going to have some really very very good imagery in a few months time Do we know if they took the blue-green or near-IR with this test run? Perhaps they're saving the release of that for the mars madia event mentioned at the HiRISE website. Doug |
| Forum: MRO 2005 · Post Preview: #47463 · Replies: 224 · Views: 152033 |
| Posted on: Mar 24 2006, 10:42 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (crabbsaline @ Mar 24 2006, 10:38 PM) Are you sure it wasn't just normal rotation, Doug? TO me - it looked like it was going sideways, like the little onboard videos you see of model rockets, but after apogee. "We did lose the vehicle," says Gwynne Shotwell, SpaceX vice president of business development. http://www.spaceflightnow.com/falcon/f1/status.html I just hope they find a root cause quickly and have another go - I really want this vehicle to work. Doug |
| Forum: Private Missions · Post Preview: #47440 · Replies: 511 · Views: 310795 |
| Posted on: Mar 24 2006, 10:30 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Well - the webfeed seemed to die after launch - but the onboard camera showed a few seconds of what looked like a tumbling vehicle.  Doug |
| Forum: Private Missions · Post Preview: #47431 · Replies: 511 · Views: 310795 |
| Posted on: Mar 24 2006, 10:02 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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WMV's are hard to record Elon just came on the net and said that the weather is green, fuel's nearly ready to go - all just about go for launch. Doug |
| Forum: Private Missions · Post Preview: #47428 · Replies: 511 · Views: 310795 |
| Posted on: Mar 24 2006, 09:49 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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It was tests way over the operational pressures of the tank that caused it to go. Like finding a tyre for a family hatchback blows at 200 mph. Doug |
| Forum: Cometary and Asteroid Missions · Post Preview: #47421 · Replies: 248 · Views: 189779 |
| Posted on: Mar 24 2006, 09:41 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Hmm - dark side perhaps for noise? Or badly smeared for flat fielding? Doug |
| Forum: MRO 2005 · Post Preview: #47418 · Replies: 224 · Views: 152033 |
| Posted on: Mar 24 2006, 09:21 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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I can see the joins Doug |
| Forum: MRO 2005 · Post Preview: #47411 · Replies: 224 · Views: 152033 |
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