Collection of High Angle Tracks/Low Angle Tracks

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greuti
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Joined: Fri Aug 11, 2006 10:11 am
Location: Switzerland

Post by greuti »

Just sifted through the whole "I think I've found a track, what do you think?" thread. Something that we should have do long ago. There are a couple of missing (and well-known) nice low angle tracks that were posted before the special LATrack thread was born. Also your recently found movie 6125350V1, fjgiie.

http://stardustathome.ssl.berkeley.edu/ ... d=451142V1
http://stardustathome.ssl.berkeley.edu/ ... =5492352V1
http://stardustathome.ssl.berkeley.edu/ ... =6150862V1
http://stardustathome.ssl.berkeley.edu/ ... =6389213V1
http://stardustathome.ssl.berkeley.edu/ ... =6842109V1
http://stardustathome.ssl.berkeley.edu/ ... =9982449V1

I think they all are/have low angle tracks, though I'm not quite certain by 6389213V1. Any opinions?

stardust1
Posts: 161
Joined: Sat Aug 05, 2006 2:08 pm
Location: Germany

Post by stardust1 »

Reviewing my events I found this one:

Movie 8894764V1 66/9/Indeterminate

-stardust1
Wir leben in einer Zeit vollkommener Mittel und verworrener Ziele. (Albert Einstein)

greuti
Posts: 200
Joined: Fri Aug 11, 2006 10:11 am
Location: Switzerland

Post by greuti »

Nice one! The particle even splited in two pieces and a smaller one entered further in.

stardust1
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Joined: Sat Aug 05, 2006 2:08 pm
Location: Germany

Post by stardust1 »

I thought of 2 seperate tracks and called it "low-angle-stereo-hit"
[edit] working title: "Shoemaker´s sons" [/edit],
because I can´t see a common entry point.
Last edited by stardust1 on Wed Dec 20, 2006 1:27 pm, edited 1 time in total.
Wir leben in einer Zeit vollkommener Mittel und verworrener Ziele. (Albert Einstein)

greuti
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Joined: Fri Aug 11, 2006 10:11 am
Location: Switzerland

Post by greuti »

If it splited during entering, then it could happened in the visible single track - and "the two tracks" additionally superpose each other now.

There're images of splited particles in aerogel wherein the pieces got quite a bit drift to each other.
http://stardust.jpl.nasa.gov/images/2trackposter.jpg

stardust1
Posts: 161
Joined: Sat Aug 05, 2006 2:08 pm
Location: Germany

Post by stardust1 »

greuti wrote:If it splited during entering, then it could happened in the visible single track - and "the two tracks" additionally superpose each other now.
There're images of splited particles in aerogel wherein the pieces got quite a bit drift to each other.
http://stardust.jpl.nasa.gov/images/2trackposter.jpg
Thanks greuti.
You are surely right. Perfectly illustrating picture.

-stardust1

P.S.: The mentioned working title must be: "Shoemakers lost sons"
Wir leben in einer Zeit vollkommener Mittel und verworrener Ziele. (Albert Einstein)

greuti
Posts: 200
Joined: Fri Aug 11, 2006 10:11 am
Location: Switzerland

Post by greuti »

stardust1 wrote: P.S.: The mentioned working title must be: "Shoemakers lost sons"
Very nice nickname :). And who knows, in addition to its look it also could be likely a particle lost from a comet.

greuti
Posts: 200
Joined: Fri Aug 11, 2006 10:11 am
Location: Switzerland

new findings?

Post by greuti »

Long ago that someone posted a new finding of a low angle track.

If you have one in your event list that is not yet listed here, please place it here or in the other thread... thanks!

sssand2
Posts: 11
Joined: Wed Feb 21, 2007 11:59 am
Location: Colorado, USA

What are the key identifiers to look for?

Post by sssand2 »

Hi,
I am fairly new to the search and I appreciate this list as it shows me some other tracks to look for. However, when I scan some of the movies listed, I don't really see a track. Some I can see fairly obviously. What are the key features of a LAT to help identify it as such? Would it be possible for at least some of the less obvious movies to state where the LAT is? Thanks for your help!

Steve

sssand2
Posts: 11
Joined: Wed Feb 21, 2007 11:59 am
Location: Colorado, USA

Is this one?

Post by sssand2 »

Does this movie contain a LAT? I think there might be one toward the upper right. Thanks!

http://stardustathome.ssl.berkeley.edu/ ... =3082201V1

Steve

sssand2
Posts: 11
Joined: Wed Feb 21, 2007 11:59 am
Location: Colorado, USA

possibly another

Post by sssand2 »


BruceHull
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Joined: Mon Mar 05, 2007 11:18 am
Location: Silver Spring, MD USA

...and possibly another?

Post by BruceHull »

I am not sure about this image due to the curve in the track.

http://stardustathome.ssl.berkeley.edu/ ... =7960825V1

fjgiie
DustMod
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Location: Hampton, SC, US

Post by fjgiie »

Hi BruceHull,

On 7960825V1 I would say that is a surface feature like a crack or something. On your other movie 5246339V1, it's probably a good idea to click in that bottom right corner. The object is below the surface and there is not enough focus to see much so I would click something.

Nikita
DustMod
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Location: Indiana, USA

Post by Nikita »

Don't be surprised if 5246339V1 gets rescanned. It is a tricky one and I suspect some surface stuff, but they will probably rescan before deciding.
Again, I would have clicked too, just to flag them if nothing else!
Good luck!
From dust we come

greuti
Posts: 200
Joined: Fri Aug 11, 2006 10:11 am
Location: Switzerland

Re: What are the key identifiers to look for?

Post by greuti »

sssand2 wrote:Hi,
However, when I scan some of the movies listed, I don't really see a track. Some I can see fairly obviously. What are the key features of a LAT to help identify it as such?
Hi Steve,

Yea some are very small or short. They even leave a doubt whether they are real tracks or only a deeper scratch from a surface particle.

The key feature of a LAT in the Virtual Microscope is the focused part of it runs up and down along the track in the aerogel depend on your focus bar position (beneath the surface). In other words, when a particle is entered, then it left a tube in the aerogel depend on its size and relative velocity and impact direction. A tube where only a section of it is in the focus at a time.

Some of the LATs are commented in the Low Angle Track thread and earlier in the "I think I've found a track, what do you think?" thread.

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