Chatroom
 

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Bad Astronomy and Universe Today Forum > Science and Space > Space Exploration
Register FAQ Members List Calendar Mark Forums Read

   

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 04-June-2003, 09:40 PM
skywatcher skywatcher is offline
Established Member
 
Join Date: May 2003
Posts: 212
Default Whats going on with soho pics the sun is gone...

http://soho.nascom.nasa.gov/data/rea...e-eit_195.html
Reply With Quote
  #2 (permalink)  
Old 04-June-2003, 09:55 PM
ToSeek's Avatar
ToSeek ToSeek is online now
Vulcan Administrator
 
Join Date: Oct 2001
Location: Greenbelt, MD
Posts: 26,357
Default

Looks as if there might have been some problems with the instrument, but it seems to be better now. Tried to see what the other instruments were showing during the problematic time period, but didn't see any from then.
__________________
Everything I need to know I learned through Googling.
Reply With Quote
  #3 (permalink)  
Old 04-June-2003, 09:55 PM
Guest
 
Posts: n/a
Default

I don't know what happened.......but did you also notice that later on it looks like it blew up.

It looks like something happened with the instruments briefly.....but it seems to have been rectified.

-Justin
Reply With Quote
  #4 (permalink)  
Old 04-June-2003, 09:58 PM
beskeptical beskeptical is offline
Order of Kilopi
 
Join Date: May 2002
Location: Seattle, WA
Posts: 5,331
Default

I shouldn't venture an answer here because I don't know if this is the reason for the above failure. The satellite doesn't work when it is being bombarded by an X flare particle wave. There were a couple of solar X flares in around May 30th.
__________________
~~ ><>><> ~~ ><,,> ><,,> ...`;=;p d;=;' /\/\^/\ ^^ ^/\/\_
Democracy Now! - The lost art of investigative news reporting.
Reply With Quote
  #5 (permalink)  
Old 04-June-2003, 09:59 PM
Comixx's Avatar
Comixx Comixx is offline
Established Member
 
Join Date: Mar 2002
Location: Los Angeles / Phoenix
Posts: 346
Send a message via AIM to Comixx Send a message via Yahoo to Comixx
Default

Well, BA should answer this, because he would know...

If it's not a glitch, then I'd say they shielded the instrument for a few moments to let it reset/callibrate or some such. You can see the Sun's afterglow in the first few frames that the Sun does not appear at all, and it gradually fades. That would be my guess.

edit: Hey, reboot the EIT wouldja?
__________________
~Brad - Astropaparazzo
http://signaturedigitalimages.com
Reply With Quote
  #6 (permalink)  
Old 04-June-2003, 10:02 PM
beskeptical beskeptical is offline
Order of Kilopi
 
Join Date: May 2002
Location: Seattle, WA
Posts: 5,331
Default

Here's a pic of a new giant flare if the site doesn't auto update to other pics. If it does just look back for the ones of the event. You can't miss it.
http://sohowww.nascom.nasa.gov/data/...altime-c2.html
__________________
~~ ><>><> ~~ ><,,> ><,,> ...`;=;p d;=;' /\/\^/\ ^^ ^/\/\_
Democracy Now! - The lost art of investigative news reporting.
Reply With Quote
  #7 (permalink)  
Old 04-June-2003, 10:13 PM
beskeptical beskeptical is offline
Order of Kilopi
 
Join Date: May 2002
Location: Seattle, WA
Posts: 5,331
Default

Gee, now that I take a second look at the flare above, I realize it just happened and it is huge. But, I think it's on the far side of the Sun because it isn't showing up on the satellite monitors. Either we'll see a reading in the next few minutes or it is on the other side.
__________________
~~ ><>><> ~~ ><,,> ><,,> ...`;=;p d;=;' /\/\^/\ ^^ ^/\/\_
Democracy Now! - The lost art of investigative news reporting.
Reply With Quote
  #8 (permalink)  
Old 04-June-2003, 10:15 PM
kurtisw kurtisw is offline
Junior Member
 
Join Date: Jan 2003
Location: Austin, TX
Posts: 82
Default

From the SOHO realtime images main page:
"NOTICE: SOHO will be offpointed by 2 degrees until later today (June 4)"

Given that the sun is blurred in a couple of images (like the spacecraft was
moving), I think this is the explanation.

It looks like there was another offpointabout a year ago, with the purpose being to get flat fields for the camera.
Reply With Quote
  #9 (permalink)  
Old 04-June-2003, 10:21 PM
beskeptical beskeptical is offline
Order of Kilopi
 
Join Date: May 2002
Location: Seattle, WA
Posts: 5,331
Default

Well, I said I shouldn't try to answer. It did look like they had turned the satellite.
__________________
~~ ><>><> ~~ ><,,> ><,,> ...`;=;p d;=;' /\/\^/\ ^^ ^/\/\_
Democracy Now! - The lost art of investigative news reporting.
Reply With Quote
  #10 (permalink)  
Old 04-June-2003, 10:40 PM
Guest
 
Posts: n/a
Default

But I wonder what caused it to look like the sun was blowing up.

-Cpt Steiny
Reply With Quote
  #11 (permalink)  
Old 05-June-2003, 03:14 AM
Comixx's Avatar
Comixx Comixx is offline
Established Member
 
Join Date: Mar 2002
Location: Los Angeles / Phoenix
Posts: 346
Send a message via AIM to Comixx Send a message via Yahoo to Comixx
Default

Quote:
Originally Posted by CptSteiny
But I wonder what caused it to look like the sun was blowing up.

-Cpt Steiny
An instrument that is very sensitive to light was turned away from it's light source and allowed to adjust to the darkness. Then it was turned back towards the light and had to re-adjust to the brightness. Havent you ever gone from a dark room to bright sunlight and had the light seem to flare up brighter than ever? Same deal here, I would think, as the sensitivity re-adjusted to the bright light again.
__________________
~Brad - Astropaparazzo
http://signaturedigitalimages.com
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT. The time now is 09:39 PM.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2010, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.0.0
©  2006 Bad Astronomy and Universe Today