(meteorobs) Utah, Wyoming, Idaho Bolide 18NOV09 (Thomas Ashcraft

[drobnock]

Those seeking the combined vlf/vhf signature:

I listened to Thomas Ashcraft's  mp4/wmv formats below and played back
the recording using a sound editing program by Sonic which allows me to
listen to
segments of a wav. or mp4 recording pattern..

Within the Ashcraft recording during the video capture of the 18nov09
fireball I found a distinct damper wave signature,  stronger than the
the other seferics in the recording. The signature was in the time frame
of the meteor being visible on video.  The wave form has a larger
amplitude that the adjacent noise. It is a distinct click along the
lines of a seferic noise.

Please take the time to record the wav or mp4 and use a similar sound
editing program and look for the snap or crackle whilst the meteor is
shown.

George John Drobnock