Dust Storm |
Dust Storm |
Oct 18 2005, 05:47 PM
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Junior Member Group: Members Posts: 71 Joined: 11-May 05 From: Colorado USA Member No.: 386 |
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Oct 31 2005, 05:01 PM
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Senior Member Group: Members Posts: 3009 Joined: 30-October 04 Member No.: 105 |
Here is another evaluation of the sky brightness. Using two "similar" Rear Hazcam images, I used the bottom of the solar panel as a greycard to measure the incident light from the ground onto the panel. Selecting two 75x75 pixel apertures on the right and left sides of the panel in each image and averaging the value in each aperture, I adjusted the brightness of the two images so that the value of each aperture was the same in both images. This way, I ensured that the "greycards" had the same value and this allowed me to evaluate the relative intensities of the shadowed areas in the foreground. This is meatball photometry since it disregards a lot of variables, but I think it suggests that the shadows are brighter on Sol 627.
FWIW^2. --Bill -------------------- |
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