Spirit cleaner? |
Spirit cleaner? |
Jul 8 2007, 06:08 PM
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#91
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Member Group: Members Posts: 133 Joined: 3-June 06 From: the jungle of Nool Member No.: 799 |
Giving another talk later this week and would appreciate advice on this pic I've made for it... Sky too blue? Not blue enough? Not going for 1000% scientific accuracy this time, just wanting to try and put across the beauty of Mars... Stu, I would make the sky bluer around the sun. It is, after all, a Martian sunset. I noticed that the sundial shadows are most distinct in the L6 image when the base image was taken - which means the direct light was bluer than the indirect light. |
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Jul 8 2007, 06:49 PM
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#92
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Thanks hort, bluer it shall be I was just unsure about the optical effect of all the "storm dust" in the atmosphere, you know?
Wish I could see that for real... how cool would it be to see that Sun sinking behind those hills and then see Earth shining in the twilight... Hey, just noticed this is my 1000th post! -------------------- |
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Jul 10 2007, 10:27 PM
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#93
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Senior Member Group: Members Posts: 1619 Joined: 12-February 06 From: Bergerac - FR Member No.: 678 |
New pics on the exploratorium for Spirit
Look at the panel : http://qt.exploratorium.edu/mars/spirit/na...CMP1665L0M1.JPG It seem to be cleaned, isn't it? -------------------- |
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Jul 10 2007, 10:46 PM
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#94
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
Yep, another cleaning event for Spirit's solar panels.
Spirit's forward hazcams weren't so lucky http://qt.exploratorium.edu/mars/spirit/fo...CMP1214R0M1.JPG |
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Jul 11 2007, 02:49 AM
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#95
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Member Group: Members Posts: 184 Joined: 2-March 06 Member No.: 692 |
Yikes! Thats a spectacular and unique amount of dust accumulation. I wonder what percentage of total erosion and deposition occurs during these periods of near global dust storms?
Brian |
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Jul 11 2007, 03:35 AM
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#96
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Member Group: Admin Posts: 468 Joined: 11-February 04 From: USA Member No.: 21 |
Looks like the winds picked up sometime between 1247 and 1248, which might have also been the event that dusted up both front hazcams.
Here's the capture magnet, in L4: |
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Jul 11 2007, 03:46 AM
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#97
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
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Jul 11 2007, 07:44 AM
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#98
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
The Silica Valley tracks have been virtually wiped out in the last couple of weeks. Amazing stuff.
Doug |
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Jul 11 2007, 09:16 AM
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#99
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Member Group: Members Posts: 307 Joined: 16-March 05 Member No.: 198 |
Yep, another cleaning event for Spirit's solar panels. Spirit's forward hazcams weren't so lucky http://qt.exploratorium.edu/mars/spirit/fo...CMP1214R0M1.JPG That raises the question of whether there would be any useful advantage in having dust covers (or some equivalent) for cameras in future (long-lived) Mars landers like MSL. Or would such things be more trouble than they were worth? (Eg one more thing to break down on an aging lander.) ====== Stephen |
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Jul 11 2007, 09:23 AM
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#100
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
1200 sols without significant dust deposition on lenses - and workarounds for when there are anyway (new flatfields onboard etc). For a 600ish sol Primary mission for MSL - such a thing isn't going to be necessary or required. Yes - I know it will likely last MUCH longer, but the primary mission is what you design for.
Doug |
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Jul 11 2007, 11:31 AM
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#101
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Senior Member Group: Members Posts: 1619 Joined: 12-February 06 From: Bergerac - FR Member No.: 678 |
I don't know where put this : here or on the Storm topic?
But, I've updated my following of sky opacity from Spirit site. Here is the picture : The rising dust quantity is particulary clear on the Sol 1248 (see Grissom Hill). -------------------- |
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Jul 11 2007, 02:34 PM
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#102
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Senior Member Group: Members Posts: 2920 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
The rising dust quantity is particulary clear on the Sol 1248 (see Grissom Hill). Clear is actualy not the right word ! -------------------- |
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Jul 11 2007, 02:36 PM
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#103
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Senior Member Group: Members Posts: 2920 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
... but the primary mission is what you design for. Doug May be OT but do you know the margin engineers actualy take? Is it 2x? 10x? -------------------- |
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Jul 11 2007, 03:02 PM
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#104
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
I'm sure I heard 3x (i.e. 270 sols for MER )
Doug |
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Jul 11 2007, 03:14 PM
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#105
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
I've updated my following of sky opacity from Spirit site. Here is the picture : Thanks for that, Ant. Do you know how consistent the local times of day are for the individual frames? Ie, are they all taken at near 12:00, for example?These images are autostretched, of course. Once the calibrated data are in, I'd love to see a version of your montage using absolute illumination levels, so you could directly see how much darker it got during the storm. |
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