[meteorite-list] 2nd Report from Strewnfield in Edgewood Texas

From: Jim Wooddell <nf114ec_at_meteoritecentral.com>
Date: Tue, 7 Feb 2012 11:50:59 -0700
Message-ID: <69C28C76BF014F44A2298EB54095E27E_at_Grande>

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" <mfries8 at hotmail.com>
To: <meteorite-list at meteoritecentral.com>
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<nf114ec at npgcable.com> wrote:
>>
>>> From: Jim Wooddell<nf114ec at npgcable.com>
>>> Subject: Re: [meteorite-list] 2nd Report from Strewnfield in Edgewood
>>> Texas
>>> To: "Dennis Miller"<astroroks at hotmail.com>,
>>> mccartney at blackbearddata.com, meteorite-list at meteoritecentral.com
>>> 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"<astroroks at hotmail.com>
>>> To:<mccartney at blackbearddata.com>;
>>> <meteorite-list at meteoritecentral.com>
>>> 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: mccartney at blackbearddata.com
>>>>> To: meteorite-list at meteoritecentral.com
>>>>> 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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Received on Tue 07 Feb 2012 01:50:59 PM PST