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Message Subject SOLAR WATCH * 312 M & 25 X FLARES starting 3-7-2011 (Updated Daily)
Poster Handle Spittin'Cesium
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Really? Have you looked at the slideshow for Stereo Behind HI1 with dates from the 17th through the 20th? I'm not talking about celestial bodies - it's a dark region that seems to grow (get closer) as the slides progress. [link to stereo-ssc.nascom.nasa.gov] Just look, please.

It may be nothing, but I'd love a more expert opinion than my own. Looks odd to me.
 Quoting: Anonymous Coward 30177359


Don't bother man. This guy seems like a cool chill dude, but I think he needs to humble himself to the universe.
 Quoting: Da fuq


It would take two seconds for someone on this thread (with more experience than the casual watchers like myself) to confirm or deny that there is an anomaly. I really didn't think it was a big deal to ask that of Hugh or someone else on this thread.

To recap, it's the slideshow for Stereo Behind HI1 dates 20121217 through 20121220 showing a dark region that seems to grow (get closer) as the slides progress.

[link to stereo-ssc.nascom.nasa.gov]
 Quoting: Anonymous Coward 30177359


I'm more than sure you noticed that he completely ignored your claim of the dark region. Because it is foreign to him.
 Quoting: Da fuq


Take it easy Da Fuq - Hugh may be trying to find out for all you know,these things can take time you know.

Anyhow,I have been checking around a little myself to give a explanation for the apparent Dark patch(just because we see something it doesn't always mean it is a true image)anyway,it could be a Number of different reasons,I'll start by posting the scheduled events for the Instruments,here -

Scheduled activities for Week 51:

M Dec 17 (352)
T Dec 18 (353) Ahead: SECCHI stepped calibration roll, 10:15 UT
W Dec 19 (354)
T Dec 20 (355) Behind: Momentum dump, 21:00 UT
F Dec 21 (356)
S Dec 22 (357)
S Dec 23 (358)

So that is for Behind for Today but I think it may be something else,for instance 'Background Subtraction' -

Snipped -

'The instrumental background is derived from an examination of images over several weeks both before and after the observation. Thus, for the most recent images, only preliminary backgrounds can be applied. This sometimes causes too much to be subtracted from some regions, making these areas dark. To get around this problem, the coronagraph images are regenerated at intervals of 15 and 35 days after the observation, when better backgrounds are available' [link to stereo.gsfc.nasa.gov]

But it could be caused by a Number of different reasons,you could try looking and reading through this [link to stereo.gsfc.nasa.gov] to understand better what goes into producing these images.

Or I could show you other examples of the exact same thing happening at other times like this [link to 1.bp.blogspot.com] <--- That's from March 12th 2012 [link to astroblogger.blogspot.co.uk] .

Here is the video of that -



You'll notice at the end of the video the Dark patch disappears,this leads me to believe that it is simply due to a non-fully processed image,it can take up to 35 Days to have the images fully processed and corrected for any subtractions/mixed instrument images etc.

This is all part of having the ability to see almost raw data in real time.

Try not to be so hasty to jump down someones throat because they didn't yet try and answer your ponderation,cool?

Cool.

sun
 
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