MSL - Astronomical Observations, Phobos/Deimos, planetary/celestial observations and more |
MSL - Astronomical Observations, Phobos/Deimos, planetary/celestial observations and more |
Jun 29 2013, 05:25 PM
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#31
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Senior Member Group: Members Posts: 4247 Joined: 17-January 05 Member No.: 152 |
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Aug 21 2013, 10:25 PM
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#32
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Senior Member Group: Members Posts: 4247 Joined: 17-January 05 Member No.: 152 |
Here's what I dreamed of doing 7 years ago - I've subtracted the average of the 8 post-transit RLB hazcam frames from each transit frame, then added 128 and did a small symmetrical stretch. So neutral grey means the same as after the transit, dark grey means darker, and light grey lighter than after transit:
As the transit ends, everything goes to neutral grey, with the last bit of shadow fading off into the east. The sky looks brighter during the transit (first two frames) than after, which can't be true of course. So what's probably happening is that different exposures, or more likely just different auto-stretching, are being applied. We'll have to wait for PDS (or a press release) to see how much the sky darkened during the transit... |
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