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OFMM Discussions for the OFMM project.

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Old 01-09-2012, 10:23 PM   #106
Urwumpe
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Quote:
Originally Posted by Loru View Post
 It's around 60 meter wide
Too big?
yes, 60 meters is a lot too much. 10-20 meters would be my estimate for a 250 kg TNT impact, but that depends a lot on the terminal velocity. Do you have a measurement from Orbiter already?

(On Earth, this projectile would make a 7m diameter simple crater, 1.34 meter deep, Mars should be close despite the lower gravity, since rock density is more important)

Last edited by Urwumpe; 01-09-2012 at 10:29 PM.
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Old 01-09-2012, 10:26 PM   #107
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I think about 2.5 km/s is the average impact velocity
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Old 01-09-2012, 11:05 PM   #108
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Are you using similar equation to estimate TNT equivalent of kinetic impact:

Code:
TNT Equivalent [kg] = m[kg] (0.5 * V^2) / 4.5e6
???

I got

173 kg of TNT for 2.5 km/s

and

250 kg of TNT at 3 km/s

From 600 km high orbit impact is around 3 km/s
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Old 01-18-2012, 11:54 PM   #109
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I don't know how well this could work, but could we use mars to help with parallax measurements to help refine the distances of stars? If it's enough of a change in distance, it could help us refine figures...

Side note: I have a sketchup model of a possible seismometer for us. It's simple, and solar powered. It would be a UCGO cargo, but I need the .skp turned into a .msh, and I can't do that and keep the textures. Any help would be welcome.
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File Type: zip seismometer.zip (257.2 KB, 3 views)
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Old 01-19-2012, 04:08 PM   #110
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This is what I have for now:


Finalized version is attached.
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File Type: zip seismometer.zip (257.7 KB, 2 views)

Last edited by MaverickSawyer; 01-19-2012 at 04:33 PM.
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Old 01-19-2012, 05:51 PM   #111
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I know cubes are easy but come'on - it was done in like 40 minutes


Last edited by Loru; 01-19-2012 at 05:53 PM.
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Old 01-19-2012, 06:18 PM   #112
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Hey, I tried. I'm not good at making complex stuff outside of Solidworks.
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Old 01-19-2012, 07:24 PM   #113
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Decided to give a go myself:


Around 2500 polys.

Done in around half an hour.
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Old 01-20-2012, 05:06 AM   #114
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Tried as well:



But seeing as we don't want to go down the "old OFMM path" (and I have yet to learn coding), I suggest someone else's seismometer.
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Old 01-20-2012, 05:40 PM   #115
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Who says there needs to be output? We just need the meshes, so we can use UCGO to pack them along, then place them. Something for the EVA people to do while out on the surface.
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Old 01-21-2012, 04:55 PM   #116
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surface science kit:
(from left to right: - mobile sat uplink dish, weather station, RTG, Scientist



underway: seismometer & drill.
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Old 01-23-2012, 05:15 PM   #117
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perfect!
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Old 01-28-2012, 07:49 PM   #118
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drilling some holes (on the right)

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Old 01-28-2012, 07:58 PM   #119
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Hmm... a drill core sample container might be a wise addition.
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Old 01-28-2012, 08:42 PM   #120
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I think we can use UCGO crate for that
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