Opportunity Route Map |
Opportunity Route Map |
Feb 11 2005, 08:11 AM
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The Insider Group: Members Posts: 669 Joined: 3-May 04 Member No.: 73 |
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Aug 21 2006, 01:47 AM
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Member Group: Members Posts: 656 Joined: 20-April 05 From: League City, Texas Member No.: 285 |
Best guess at the location of Hawking Rock:
http://www.clarkandersen.com/R1500822_NWVi...mpp_Hawking.PNG (big file, about 4.5 Megs, uncompressed) This is a rescaled version of image R1500822 (the map projected version), scaled to 0.5 meters per pixel. It seems in reasonable agreement with the azimuths as reported by the AlgorimancerPG application. I managed to find a single image showing Hawking from Sol 887, combined with another from Sol 904, yielding about an 80 meter baseline. Performed wide baseline photogrammetry to Hawking to yield the single-pixel hilighted positions. Results of 4 calculations are shown (single colored pixels). I would lean towards the lower two "corrected azimuth" versions (w/corrections referenced to the Twin Peaks yielding +0.33637284 azimuth degrees for Sol 887 and +0.086453315 azimuth degrees for Sol 904 (azimuth correction will be available in APG 3.3, not yet posted). I would allow a bit of leeway in the east-west dimension to allow for error in the image projection, but feel pretty confident about the north-south position (to within a few meters). Bearing in mind that illumination is from the left in this image, several features immediately east and west of the lower two pixel positions may in fact be Hawking, but for the moment I'm leaning towards the dark E-W linear feature immediately to the left (west) of the lower pixel pair, which terminates at the pixels, as Hawking + shadow. In ImageJ, with the image processed to apply a shadow illuminated from the Northwest, that feature stands out nicely. It would be interesting to look at azimuths to Hawking from more recent Oppy positions, but for now there is some fuzziness in those positions, and no good horizon reference to calibrate the azimuth. |
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Aug 21 2006, 03:57 AM
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Member Group: Members Posts: 477 Joined: 2-March 05 Member No.: 180 |
Best guess at the location of Hawking Rock: http://www.clarkandersen.com/R1500822_NWVi...mpp_Hawking.PNG (big file, about 4.5 Megs, uncompressed) Just a side note, Irfanview can compress (losslessly) PNG files quite well. Get the Plugins pack and you can use PNGOut, which can really compress PNG files. I ran your file there through Irfanview with PNGOut, and it's down to 2,684,928 bytes. And now back to your regularly scheduled thread.... |
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