[sheeny (Al)]

Here's today's effort. I found a couple of meteors in yesterday's infrasound trace.


The one at 07:09:36 UTC I believe entered the atmosphere past me (in the direction of travel) hence the negative phase.


The one at 04:05:57 UTC is very slow. This is because 04:07 UTC is 15:07 AEDT so at this time of the afternoon both the motion of the earth around the sun and the rotation of the earth on it's axis are working to slow the relative speed of the meteor. Meteors are rarely detected this time of day visually so it appears slower than "normal".


Slow meteors don't punch such a big hole in the atmosphere so the dominant signal period is less.


Also of interest in this wave form is the apparent change of phase after the first cycle. Purely speculation on my part, but I wonder if this indicates the point of closest approach to the observer - i.e. towards until that point and then further away after.


The sub classification "a" means there is a decaying oscillation following the primary signal.


Al.