From: Marc Fries<[email protected]>
Subject: Re: [meteorite-list] 2nd Report from Strewnfield in Edgewood Texas
To: [email protected]
Date: Tuesday, February 7, 2012, 5:16 PM
Rather quietly and "behind the
scenes", there has been a lot of work
developing the use of weather radar to detect meteorites, by
Rob Matson,
Jake Schaefer, myself, my brother, and others. It's
been a tall
learning curve but I think we've made a lot of
progress. In my opinion,
the biggest "unknown" left at this point is to figure out
what size of
meteorites and/or other debris actually show up best in
radar data. The
radar reflections we see are not only reflections off of
solid objects
but also from atmospheric turbulence. And we also have to
unravel the
knot of reflections in the Mie scattering regime, where the
reflected
signal strength varies widely - and nonlinearly - with the
size of the
reflector. The upshot is that we are still working on
sorting out what
radar reflection equates to what size of meteorite. If we
see a radar
reflection, is it from search-worthy stones or just a cloud
of ~1g
rocks, or even ablation spherules? A good part of that is
just a matter
of timing, but not all of it. Lorton, for example,
produced a strong
radar signature in TDWR radar data but nothing was found
beyond the
original doctors'-office-smasher, suggesting that we were
looking at a
swarm of tiny rocks....? The same is true for the
Jacksonville, IL event.
This DFW fireball appears to come from a well-consolidated
object that
survived a long "burn" time with little in the way of
fragmentation.
West, TX, by comparison, fragmented extensively and produced
a
beautiful, easy to follow set of radar signatures. My take
on the DFW
fireball is that we're looking for a small number of large
rocks that
reached the ground quickly, producing a short-lived radar
signature that
requires some degree of luck to figure out. ...or are
we looking at 1g
stones that no one is going to find? Just having that
answer in hand
will tell us a lot about where to look.
Still working on it...
Cheers,
Marc Fries
On 2/7/12 8:46 AM, Steve Dunklee wrote:
The radar data is not off. It is just not understood by
most people how the parabola of a fall can cause the actual
landing area to be up to 12 miles away from the radar data.
If you stick a french curve in an apple to represent the
west to east fall. the termination point is north to
northwest of the radar data.
Cheers
Steve Dunklee
--- On Tue, 2/7/12, Jim Wooddell<[email protected]>
wrote:
From: Jim Wooddell<[email protected]>
Subject: Re: [meteorite-list] 2nd Report from
Strewnfield in Edgewood Texas
To: "Dennis Miller"<[email protected]>,
[email protected],
[email protected]
Date: Tuesday, February 7, 2012, 4:29 PM
Hi All!
I thought it was determined the Radar data was
off???
And, it really is not a strewn filed until one is
actually
found!
Cheers!
Jim
Jim Wooddell
http://k7wfr.us
----- Original Message -----
From: "Dennis Miller"<[email protected]>
To:<[email protected]>;
<[email protected]>
Sent: Tuesday, February 07, 2012 8:55 AM
Subject: Re: [meteorite-list] 2nd Report from
Strewnfield in
Edgewood Texas
Nice! I am so glad you didn't set the public
price too
high, like
Thousands
for Ash Creek. :-) I do hope you are successful
in your
hunt. Keep us
posted.
Missed you in Tucson! Again, Good Luck!
Dennis Miller
From: [email protected]
To: [email protected]
Date: Mon, 6 Feb 2012 22:17:55 -0700
Subject: [meteorite-list] 2nd Report from
Strewnfield in Edgewood Texas
Nothing has been found where the radar data
said it
might be. Torvald
and Donavan have left the zone replaced by
Stephen
Thompson out of
Fredricksburg TX who is an expert on Sonic
Boom
characteristics.
I've been lucky enough to get some media
attention
to try to motivate
the public to assist here is today's
interview on
TV. This is the 5 TV
interview I've given since arriving.
http://dfw.cbslocal.com/video/6713580-meteor-hunters-scouring-north-texas/
We spent the day interviewing more
witnesses&
compiling and extending
the range of sonic boom farther to the east
to
include Wills Point, and
southern Lake Tawakanii.
We'll do some field samplings tomorrow east
of 19.
Also as a warning. I've heard from a local
that the
landowner who owns
the land in the north where the upper radar
blip
is, has gotten very
hostile to all outsiders. The local warned
me to
tell everyone to stay
off that property. He thinks the landowner
may
shoot to wound or maim.
So I'd like everyone to take that threat to
heart.
At this point, we have two new important
observations and think the
strewnfield to be east of 19 now.
At this point, there have been no Z
sightings, but
the Black Panther
remains a constant threat. 5 dogs were
killed.
Also, the park rangers
at the state park warned us that a mountain
lion
has been spotted in the
area.
Some sonic boom activity has been traced
back to
some individual using
some kind of reactive explosive that
detonates when
shot by a bullet.
The local police has informed us this has
been a
bit of a problem for
weeks. Consequently, it really screws up
our
acoustical survey.
and a mention and big hand to Dirk Ross,
David
Gonzales, and Marc Fries
for giving us back support.
-mccartney taylor& stephen
thompson
(meteorite hunter) (offical panther bait)
______________________________________________
Visit the Archives at
http://www.meteoritecentral.com/mailing-list-archives.html
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
______________________________________________
Visit the Archives at
http://www.meteoritecentral.com/mailing-list-archives.html
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
______________________________________________
Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
______________________________________________
Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
______________________________________________
Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
