(meteorobs) RE: Leonid "gusts'-the 1997 Japanese Video!

To: meteorobs@jovian.com
Subject: (meteorobs) RE: Leonid "gusts'-the 1997 Japanese Video!
From: Dave English <prospector@sd.znet.com>
Date: Wed, 03 Nov 1999 09:50:15 -0800
Organization: none
Reply-To: meteorobs@jovian.com
Sender: owner-meteorobs@jovian.com

Steve,

       Your second ping may be the outside wall of the shock structure 
created by the meteor, your third ping, other shock structures. With 
patience and testing you may be able to decipher the stuctues of some 
meteor shock waves from some frequencies. I would look up the four 
meteors in Oct. that you said had double pings within 20 minutes, this 
is your key to understanding the radiant and speed that produces 
multible pings.

       During the summer and fall of 1997 I saw several shock 
structures from unborn meteors (or so I believe). At altitude the 
structures would be about 400-1000 feet wide, visually they were 4 to 
8 minutes arc wide. I also twice have seen meteors after seeing shock 
wave fragments first, see my post of 10 July 1999, also the post about 
pre-meteor trains of 18 July that I reposted from Alastair McBeath. I 
believe at times you may detect these shock wave fragments and maybe 
pre-meteor trains too.

       By developing observation techniques and sharing it with others 
you could, with research and testing, possibley explore and define 
shock wave structures created by metors. You have a primitive RADAR, 
RAdio Direction And Range finding, certain frequencies should give 
better results than others and receiving anntennas certainly a 
consideration in designing something to define structure. Could an old 
TV dish be adapted to receive bounced signals? 

                           Dave English

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