Topographical Diversity inside of 500 m Radius MER Landing Spots: Comparison Among Landing Ellipses

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RS - 2. Reason for Study. Activity thing from last MER Athena group meeting: Evaluate the likelihood of arriving inside of wanderer cross separation of

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´╗┐Topographical Diversity inside 500 m Radius MER Landing Spots: Comparison Among Landing Ellipses Robert Sullivan Jon Branscomb R. Alan Faquet Michael Fergen John A. Peterson Larry Soderblom Steve Squyres

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Purpose of Study Action thing from last MER Athena group meeting: Evaluate the likelihood of arriving inside wanderer navigate separation of "intriguing territory" in the main hopeful landing ovals. + = neighborhood high logical intrigue (e.g., layered outcrops, bizarre surface materials)

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Approach to Problem Apply 500 m span "landing spots" all through the main competitor landing circles as indicated by the proper likelihood work Evaluate the potential science intrigue and differing qualities in each of these spots utilizing MOC pictures, where accessible. Hurricane ep82a

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Image Preparation MOC pictures arranged by USGS (L. Soderblom, M. Fergen) 16-bit ISIS 3D shapes 8-bit TIFF with albedo scaled 0.0-0.4 - > 0-255 DN (with a couple of special cases) 500 m span landing site spots dispersed crosswise over landing circles (J. Branscomb) Size and introduction of landing circles as indicated by Golombek & Grant reminder of September 6 (prior trials/work utilizing prior estimating was disposed of). Most recent circles are 5-10% bigger. Eos Chasma vm41a MOC e0300738 Spots 1-6

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Evaluation Criteria Smoothness. No points of interest for route, no place to move for a nearby field-geologist diagram Dustiness. (e.g., as demonstrated by tidy fallen angel tracks) Might need to do a great deal of RATing for IDD apparatuses to be gainful; ghostly efficiency of Pancam and MTES debased Homogeneity of albedo or potentially morphology Dunes circulated firmly enough to hamper directional opportunity, diminishing achievable assorted qualities inside spot Surface morphologies in degradational states just (e.g., all holes are shallow, infilled, with unrecognizable ejecta covers and low, corrupted edges) ==> less likelihood of finding reasonable shake tests Ratings utilized a whole number size of 1 (most noticeably bad) to 5 (best). Criteria were set up amid trial practices utilizing pictures from all ROTO circles. Elements diminishing the potential logical estimation of an arrival spot:

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Evaluation Criteria Relief which uncovered layering or characterizes layering Relief outside to the detect that could even now be seen by Pancam and MTES Albedo contrasts recommending the nearness of bedrock exposures of more than one topographical unit and in addition insignificant dustiness Dunes made out of material that is seems, by all accounts, to be not quite the same as the substrate on which they rest (yet hills not all that thickly conveyed as to genuinely debase directional opportunity) Well-protected confirmation for procedures (e.g., liquid disintegration, incline advancement, affect cratering, magma stream emplacement) that could give essential data about how these procedures work on Mars Impact holes adequately all around saved to expand the potential for finding obstructs inside persistent ejecta (get rational shake tests) Factors expanding the potential logical estimation of an arrival spot:

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Evaluation Criteria Hematite plenitude (TES delineate) wealth (TES outline) plenitude (TES outline) perils Potentially disputable translations with respect to subaqueous versus subaerial affidavit of layered sedimentary units Characteristics that were not figures these assessments The accompanying attributes are vital, however are left as future layers of investigation that can be convolved later with the aftereffects of this review. Picture subtle elements discovered just inside each arrival site (or promptly in view from inside site limits) were underscored over local topographical translations. For instance, two locales with indistinguishable appearances, one with solid hematite plenitude, one without, will get a similar rating.

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Evaluation Criteria Characteristics that were not considers these assessments (proceeded with) Likewise, basic landing risk appraisals are left to be superimposed later on the consequences of this review once particular, refined peril criteria are accessible. For instance, layering uncovered in unmistakable help will build the logical enthusiasm of a site, in spite of the danger such alleviation may posture to a protected landing; future appraisals committed particularly to landing perils may preclude the site on those grounds regardless of its logical potential.

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Example of a "1" "Overwhelmed by firmly divided duneforms/floats, corrupting EW trafficability. No different elements, alleviation. No albedo contrasts." (Melas vm53a, picture e0200270, spot#5)

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Example of a "1" "Almost featureless plain, with just unobtrusive, vague alleviation. No albedo contrasts." (Eos Chasma vm41a, picture e0300738, spot#2)

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Example of a "1" "Smooth, about featureless plain. Pits are not very many, little. Little, somewhat brighter patches happen in N." (Hematite tm10a, picture e0101056, spot#4)

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Example of a "2" "Smooth, about featureless plain in E, S, W, yet incline soften into shallow discouragement happens up N, reaching out past the N edge to the misery's inside 1 km from N edge. Inside site, unclear patches of brighter material in focus and maybe along incline soften up N, optional pit group in SW (biggest ~50 m).." (Hematite tm10a, picture m0301632, spot#2)

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Example of a "3" "Rough, yet vigorously dissolved territory. Little disengaged plateaus don't show clear sheet material on their dividers, however in any case a generally reliable stature among them proposes remainders of a solitary layer that is being or was being stripped. Curved up incline breaks are adjusted, recommending the nearness of a mantling layer overwhelm the lower-lying zones. No albedo contrasts." (Gusev ep55a, picture e0301511, spot#3)

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Example of a "4" "Two units: S third of site made out of prodded handles seems, by all accounts, to be currently exhumation from underneath somewhat less tough unit in N 66% of landing site." (Gale ep82a, picture e0402461, spot#3)

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Example of a "5" "A few clearly layered units uncovered on the premise of both albedo differentiations and differential disintegration. Firmly separated splendid duneforms/floats in extraordinary N and W can be effectively maintained a strategic distance from." (Melas vmBsite, picture m2301183, spot#7)

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Example of a "5" "A few units recognized on the premise of albedo and textural contrasts. Firmly divided duneforms/floats in W effortlessly maintained a strategic distance from if fundamental. Awesome." (Melas vmBsite, picture m0804367, spot#1)

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Summary of Results

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Summary of Results

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