MAHLI capabilities |
MAHLI capabilities |
Oct 16 2011, 09:45 AM
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#1
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Junior Member Group: Members Posts: 62 Joined: 11-July 11 Member No.: 6058 |
Forgive what may seem a silly question from one whose grasp of this type of thing is less than perfect:
What are the possibilities (not probabilities!) of MAHLI being able to detect the biosignatures for which MSL is looking as part of its mission goals? What might such biosignatures look like on a microscopic scale? I gather that, even at its highest resolution, most microfossils would at best appear only the size of a pixel or two. Any info on this would be greatly appreciated. |
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Oct 16 2011, 01:21 PM
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#2
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
Note from self:
<Admin mode> "Seryddwr, let's not stray into areas noted under rule 1.3" </admin mode> Google is always our friend Your best information on MAHLI's capabilities are going to be found right here in the: MSL Science Corner and the MSL Website Instrument pages. From the MSL Science Corner: Image Resolution. The MAHLI design permits imaging over a range of spatial scales between about 13.9 microns/pixel and infinity. Malin Space Science Systems follows a strict definition for resolution of in-focus images wherein the optical blur circle is equal to or less than one pixel across. Acquiring images with 13.9 micron per pixel under actual operational conditions on Mars will likely be challenged by as-yet unmeasured uncertainties in the ability to place the camera using the robotic arm. |
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Oct 16 2011, 07:26 PM
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#3
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Junior Member Group: Members Posts: 62 Joined: 11-July 11 Member No.: 6058 |
Well, I was trying not to...! - but I take your point. It's good to know what a great improvement on the resolution of Spirit and Opportunity's instruments MAHLI will be.
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Oct 16 2011, 08:35 PM
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#4
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Junior Member Group: Members Posts: 52 Joined: 1-March 11 From: Houston, USA Member No.: 5860 |
From the MSL Science Corner:
Image Resolution. The MAHLI design permits imaging over a range of spatial scales between about 13.9 microns/pixel and infinity. There's a chart here: http://www.h2odistributors.com/chart-particle-sizes.asp showing the size of common inorganic and organic particles. The rover won't have the luxury of imaging polished flat surfaces that one can do in laboratories on Earth, and with which one can go to higher resolutions. The electron microprobe I used in school had a coincident optical microscope with sub-micron resolution; it was easy to see the effect of the electron beam, which was something over a micron wide. Clay particles are smaller than 2-4 microns, too small for MAHLI, but all sand grains and some silt particles should be within its capabilities. |
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