From: Jim Wooddell <[email protected]>
Subject: Re: [meteorite-list] 2nd Report from Strewnfield in Edgewood
Texas
To: "Marc Fries" <[email protected]>,
[email protected]
Date: Tuesday, February 7, 2012, 6:50 PM
Hi Marc and Steve and all,
My comment that the radar information was off was because of
an error in the camera location to begin searching the radar
data?
Garbage in = Garbage out.
Rob figured that out and Jim Gamble confirmed Rob's
findings.
So, my statement seems to be true in at least one
instance. Not the fault of the radar and I felt the
frustration!
I think fine tuning on where the information to research
comes from is key and it's improving all the time.
Marc, do you have HAS numbers I could bum? I am not
actively searching this one, just want to see what you are
seeing.
It's a little surprising that this fireball was not clearly
distinguished and Id'ed on radar in my mind. Why do
you think that is???
As a point of information, at least on the Sky Sentinel
network, the node operator can create a movie, regardless of
the "event" capture timing.
I can set the event capture to a very low time.
Because it is there to capture an event, all I need is the
beginning time to then go back and make a movie that will
"see" the entire event plus added time prior and after to
determine any kind of flash, etc., many seconds after the
event leaves my horizon. It's easy and only takes a
few minutes to do. IOW's, the movie, is only dependent
on the event capture to get a relative time to begin...and
that's it.
Knowing this, the radar guys (me included) can then call or
email the node operator directly and get the correct
information and data....the keyword being "directly".
Some operators, like me, may even order up the HAS data and
have that being processed, so that order number can be
shared as well, which can save some time as well when
contacted!
In regards to the sonic booms, that's great to hear all
the witnesses heard it. However, have there been
any time delays recorded? I have not seen any posted.
Kind regards,
Jim
Jim Wooddell
https://k7wfr.us
Parker Sentinel SkyCam
----- Original Message ----- From: "Marc Fries" <[email protected]>
To: <[email protected]>
Sent: Tuesday, February 07, 2012 10:16 AM
Subject: Re: [meteorite-list] 2nd Report from Strewnfield in
Edgewood Texas
> 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)
>>>>>
>>>>>
______________________________________________
>>>>>
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>>>>
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