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REPORT COPYRIGHT VIOLATION IN REPLY
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Message Subject
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"LOOK-NOW"---3 Days of Darkness Approach! NASA Stereo Behind HI1: 12/21/2012 it All Goes Dark!
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Poster Handle
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Anonymous Coward |
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Post Content
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Taking the date range back to 12/1/2012 yields no similar images to the dark ones produced since 12/17. However, there was a much smaller darkening event on 12/8/2012.
Quoting: Anonymous Coward 30420838 Taking the range back to 1/1/2012 yields no similar dark images. However, it appears that the center of the galaxy is visible in late April through early May. No similar darkening is visible during this month exactly one year ago, dispelling the possibility that the darkening is a seasonal effect. However, a large comet can be seen streaking away from the sun on STEREO Ahead/Behind HI1. Another characteristic of the dark images produced since December 17 is that the image resolution appears to be much lower than all previous images dating back to at least mid-December, 2011. Three possible explanations: 1. An imaging sensor issue has degraded sensor sensitivity since December 17 requiring pixel-binning to enhance image brightness. This would explain the image darkening effects as well as the degraded image resolution. 2. An opaque cloud is emanating from the sun. This cloud is associated with increased radiation levels causing STEREO Behind to send back images at lower resolutions in order to overcome elevated background noise. 3. Due to lack of resources, STEREO behind has been switched to conservative settings over the holidays, resulting in degraded image quality.
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