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Stereo
djellison
post Jan 17 2007, 01:04 PM
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QUOTE (jamescanvin @ Jan 8 2007, 12:24 AM) *
Yep I can download the files as well, but I don't think that is because the embargo is over but rather a fault with the archive. I've emailed someone about it for clarification and until we hear otherwise I don't think it's appropriate to post any of the SECCHI images on UMSF.


I emailed Michael Kaiser about this - asked if the stuff was supposed to be out, can we play with it, and what should be a proper credit line....

His response today:
Feel free -- we have no embargoes. Of course, we're still in instrument commissioning phase so a lot of the stuff is still pretty raw. Better stuff coming soon. As to credits...SECCHI is managed by NRL (Russ Howard, PI) and STEREO is managed by NASA/GSFC.

Yay for the Stereo team smile.gif
Doug
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ngunn
post Jan 17 2007, 02:04 PM
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QUOTE (Bob Shaw @ Jan 9 2007, 08:47 AM) *
Anybody know if Stereo will be able to see comets as they pass the Sun in er, stereo?
Bob Shaw


I don't see why not. The craft may still be pretty close to Earth now but as they spread apart along the Earth's orbit they should do that job very well, I would think.
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edstrick
post Jan 18 2007, 11:34 AM
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It's unfortunate that McNaught was too early for full commissioning of the instruments and for there to be any significant baseline batween the two spacecraft. We'd have 3-d information on the "isochron" bands you can see in the Stereo images that have shown up on the net.

Each isochron striation is the result of an impulsive dust release from an "event" at the nucleus, spreading out along the tail as light pressure sorts fine particles from coarser and coarser particles. Comet West showed such bands spectacularly.
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djellison
post Jan 19 2007, 01:14 AM
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Wow...just wow.
Date, Spacecraft and Instrument all obvious from filename.

Doug
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djellison
post Jan 19 2007, 12:40 PM
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This is from A on the 5th
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fredk
post Jan 22 2007, 12:14 AM
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This imagery is incredible - I'm drowning in 32bits/p!

Here's an animation of the past 8 days or so of imagery of McNaught, one frame per day. All images are logarithmically scaled and then shifted linearly to set black level (totally arbitrary, but it works). This is a zipped avi file, to make the 1MB limit.
Attached File  McNaught_stereo.zip ( 742.56K ) Number of downloads: 999

Incredible detail in the tail as it sails through Capricornus. Old striations becoming non-radial with the sun due to orbital motion superposed with newer radial striations. Insane. Ion tail clearly visible on the leading edge, as well. If I had time I'd do the full frame every 2 hours that are available...
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fredk
post Jan 22 2007, 12:30 AM
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Here's one uncompressed frame from the above animation, on the 16th:
Attached Image

That's Venus near bottom, and Mercury in the zodiacal light near the right of the frame.
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fredk
post Jan 22 2007, 03:06 AM
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Another animation, this time with all 12 frames from the 15th:
Attached File  McNaught_stereo_15b.AVI ( 947.5K ) Number of downloads: 484

You can follow individual features in the tail as they recede from the sun.
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Tman
post Jan 22 2007, 04:53 PM
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Wow!!! Like eagle wings on their way through the Universe - just visiting the solar system by circling our sun!

Thanks Fred!


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Guest_Sunspot_*
post Jan 24 2007, 11:21 PM
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Guests






Looking at filenames - how do we tell which are the Extreme UV 304 frame images... STEREO's equivalent of SOHO's EIT 304 (Orange)?
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djellison
post Jan 24 2007, 11:29 PM
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Beautiful anims Fred - what did you use for manipulating the FITS?

Doug
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fredk
post Jan 25 2007, 02:56 AM
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Thanks, Doug - I used ImageJ. I ain't no image wizard though, and ImageJ was all I had that worked. I like its ability to do math on pixel values and its ability to handle very deep bitdepths. It's a bargain, too.
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scalbers
post Jan 27 2007, 09:12 PM
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I see there are also some movies at this URL:

http://ares.nrl.navy.mil/sungrazer/index.p...t_news#McNaught


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Guest_Sunspot_*
post Mar 7 2007, 11:12 AM
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Does anyone know whether STEREO will have a similar policy to the SOHO mission regarding image release when everything is up and running, i.e. near real time image release. There are "beacon images" available but they are highly compressed for quick transmission.
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djellison
post Mar 7 2007, 11:13 AM
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They are already releasing stuff very rapidly - but as FITS images - they plan to get something better going eventually as I understand it.

Doug
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