[sheeny (Al)]

Back from a week away, I decided to do a little infrasound survey on last night's data to see if i could detect a change in the rate of meteors after eta Aqu rose. Looks to have detected the change, though obviously not all meteors that would have been visible were detected and identified by infrasound.


To do the survey, I set up a 0.5 to 10 Hz bandpass filter and scanned the helicorder about 15 to 20 minutes at a time looking for sharp spikes that are balanced above and below zero. I noted the minute these occurred then came back later to zoom in to the wave form and check that it is an N wave (or multiple), check it's not a seismic triggered event and to classify the meteor type. No analysis of the meteor signal was done to split component particles if any were evident.


I need to set the camera up for some star trails and capture some meteor images to correlate to the infrasound.


Al.