Author Topic: Upper Atmosphere Research Satellite (UARS) - Re-entry  (Read 111548 times)

Offline Pheogh

  • Full Member
  • ****
  • Posts: 895
  • Liked: 5
  • Likes Given: 2
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #220 on: 09/24/2011 03:59 AM »
I'm about an hour south of Portland.  I assume it's not naturally visible.  Are we thinking there might be some plasma?  Would it be visible this far south?  (Passing between Portland and Seattle)

don't be so sure its passing 60 degrees max elevation NNW over Portland according to heaven above in about 20 minutes.

Offline iamlucky13

  • Full Member
  • ****
  • Posts: 1660
  • Liked: 102
  • Likes Given: 93
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #221 on: 09/24/2011 04:00 AM »
I'm also watching in Seattle...

Offline Lee Jay

  • Elite Veteran
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 6691
  • Liked: 1000
  • Likes Given: 140
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #222 on: 09/24/2011 04:01 AM »
For all you watching naked eye, make sure you go out and get dark adapted at least 10 minutes before you expect to see something.

Offline JimO

  • Veteran
  • Full Member
  • ****
  • Posts: 1886
  • Texas, USA
  • Liked: 312
  • Likes Given: 81
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #223 on: 09/24/2011 04:02 AM »
Pacific NW observers -- keep your eyes peeled! You have this pass and if it survives, another pass [crossing coast north of Vancouver Island] 93-95 minutes later. Listen also for any SOUNDS -- hissing or rhythmic pulses -- that often occur with bright bolides. See 'electrophonic sounds' o the 'net. We've heard them in the past during shuttle entries across Texas.


Offline James P

  • Member
  • Posts: 8
  • Liked: 0
  • Likes Given: 0
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #224 on: 09/24/2011 04:02 AM »
"If" this thing gets close to making a pass over Idaho, where would it be visible in relation to Boise, Idaho? I doubt it will make it that far, but would like to try see it if it does.

Offline ginahoy

  • Full Member
  • *
  • Posts: 160
  • Liked: 5
  • Likes Given: 1
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #225 on: 09/24/2011 04:02 AM »
I'm about an hour south of Portland.  I assume it's not naturally visible.  Are we thinking there might be some plasma?  Would it be visible this far south?  (Passing between Portland and Seattle)

There would only be plasma if it's begun its reentry as it vectors closet to you. Look to the NW close to the horizon between 9:19 to 9:20 PDT

Offline JimO

  • Veteran
  • Full Member
  • ****
  • Posts: 1886
  • Texas, USA
  • Liked: 312
  • Likes Given: 81
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #226 on: 09/24/2011 04:05 AM »
For all you watching naked eye, make sure you go out and get dark adapted at least 10 minutes before you expect to see something.

Good advice -- also realize the fireball trail could be low altitude, keep scanning horizon north and south. Direct overhead pass would be unlikely.

SWLs in area -- monitor ATC conversations with airliners. Pilots often spot bright fireballs and discuss them with ground. Today's NOTAMS specifically directed them to report them immediately, so eavesdrop. If you have any friends who are shortwave listeners, call them to alert them to monitor.

Offline ginahoy

  • Full Member
  • *
  • Posts: 160
  • Liked: 5
  • Likes Given: 1
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #227 on: 09/24/2011 04:07 AM »
"If" this thing gets close to making a pass over Idaho, where would it be visible in relation to Boise, Idaho? I doubt it will make it that far, but would like to try see it if it does.

Boise is way too far SW of the ground track. Generally, for 10 degrees above the horizon, the visibility circle has a radius of about 300 miles, but less at this altitude.

You can check the ground track by drawing a line between Morton, WA and Calgary.

Offline James P

  • Member
  • Posts: 8
  • Liked: 0
  • Likes Given: 0
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #228 on: 09/24/2011 04:11 AM »
"If" this thing gets close to making a pass over Idaho, where would it be visible in relation to Boise, Idaho? I doubt it will make it that far, but would like to try see it if it does.

Boise is way too far SW of the ground track. Generally, for 10 degrees above the horizon, the visibility circle has a radius of about 300 miles, but less at this altitude.

You can check the ground track by drawing a line between Morton, WA and Calgary.

Thanks! Makes sense where it is so low now.  I had my doubts it would be visible, but didn't want to miss out just in case it was.

Offline Lee Jay

  • Elite Veteran
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 6691
  • Liked: 1000
  • Likes Given: 140
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #229 on: 09/24/2011 04:12 AM »
Here are some ground tracks, based on the 22:15 TLE (local times).
« Last Edit: 09/24/2011 04:13 AM by Lee Jay »

Offline dcbecker

  • Member
  • Full Member
  • *
  • Posts: 168
  • Northern NJ
  • Liked: 0
  • Likes Given: 0
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #230 on: 09/24/2011 04:15 AM »
For all you watching naked eye, make sure you go out and get dark adapted at least 10 minutes before you expect to see something.

Good advice -- also realize the fireball trail could be low altitude, keep scanning horizon north and south. Direct overhead pass would be unlikely.

SWLs in area -- monitor ATC conversations with airliners. Pilots often spot bright fireballs and discuss them with ground. Today's NOTAMS specifically directed them to report them immediately, so eavesdrop. If you have any friends who are shortwave listeners, call them to alert them to monitor.

can listen  to live Seattle area ATC at
http://www.liveatc.net/search/?icao=sea
Dan

Offline leclaire

  • Member
  • Member
  • Posts: 19
  • Liked: 0
  • Likes Given: 0
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #231 on: 09/24/2011 04:15 AM »
You guys should be watching the twitter feed.
http://twitter.com/#!/UARS_Reentry

Looks like it's going around again.

Offline martin_nv

  • Member
  • Member
  • Posts: 43
  • Vancouver, Canada
  • Liked: 7
  • Likes Given: 25
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #232 on: 09/24/2011 04:22 AM »
No sighting in Vancouver.

Offline JimO

  • Veteran
  • Full Member
  • ****
  • Posts: 1886
  • Texas, USA
  • Liked: 312
  • Likes Given: 81
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #233 on: 09/24/2011 04:22 AM »
Here are some ground tracks, based on the 22:15 TLE (local times).

Lee Jay, these are terrific -- I was trying to eyeball the tracks off the aerospace corporation site.

Can you make similar tracks for the Atlantic coast end of those two passes? There are plenty of potential observers there, on the ground, on the water, and in the air.

Thanks!

Offline Lee Jay

  • Elite Veteran
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 6691
  • Liked: 1000
  • Likes Given: 140
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #234 on: 09/24/2011 04:27 AM »
Local times
« Last Edit: 09/24/2011 04:29 AM by Lee Jay »

Offline Lee Jay

  • Elite Veteran
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 6691
  • Liked: 1000
  • Likes Given: 140
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #235 on: 09/24/2011 04:29 AM »

Offline JimO

  • Veteran
  • Full Member
  • ****
  • Posts: 1886
  • Texas, USA
  • Liked: 312
  • Likes Given: 81
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #236 on: 09/24/2011 04:33 AM »
These are great -- and no, they're about where I guestimated roughly, but much more precise and useful for alerting assets in the area.


Offline jcm

  • Senior Member
  • *****
  • Posts: 3004
  • Jonathan McDowell
  • Somerville, Massachusetts, USA
    • Jonathan's Space Report
  • Liked: 571
  • Likes Given: 414
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #237 on: 09/24/2011 04:36 AM »
Tweet from NASA:  It's possible that #UARS is down by now. (Everybody OK out there?) We're waiting for confirmation from US Strategic Command.

(I wouldn't read too much into this yet - jcm)
-----------------------------

Jonathan McDowell
http://planet4589.org

Offline danduc

  • Full Member
  • *
  • Posts: 116
  • Liked: 0
  • Likes Given: 0
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #238 on: 09/24/2011 04:38 AM »
At 3:28, it will be in my backyard :D

Thanks for all the work guys.

Dan

Offline ginahoy

  • Full Member
  • *
  • Posts: 160
  • Liked: 5
  • Likes Given: 1
Re: Upper Atmosphere Research Satellite (UARS) - Re-entry
« Reply #239 on: 09/24/2011 04:42 AM »
Just in case anyone's wondering, the time ticks on Lee Jay's maps are EDT (At first, I wasn't sure what he meant by local time).

Tags: