clear skies! (last update 09-11-1999)
first results of VLF/ELF-monitoring
receiver located at D64354 Reinheim/Georgenhausen
... well, my first question: has anyone taken some recordings of electromagnetic vlf/elf-emission (in the audible band) during a fireball event? I'd like to compare it with my own recordings. Please return usefull links/urls where i can get some related sound-files (xxx.WAV). I`ve tried to receive a vlf-event during the late leonid meteor shower (unfortunately i missed the best time by a whole day). One impressive LEO (truly brighter than -5) was seen at this time (Nov. 18th - 3:30-5:30 UT). The total number of meteors seen through my 'frozen' window (8 LEOs, 2 SOs) is useless. Due to a technical problem, i couldn't monitoring the vlf-signal and the sky simultaneously - also i didn't take the correct time. Later on, i revised my tape and found a strange noise differing from a regular spheric (lightning event). It sounds like a 'swirling boomerang'. I dont belive that it is an echoed spheric due to its (nearly) constant amplitude. Was it the desired vlf-footprint of a fireball - or is there an other explanation? This year i should be better prepared for the main meteor showers!!! Thanks for all responses Hans Guenter
Fig. 1 Spectrogram of some events during
the leonid meteor
storm
Note: *.wav files will be available if postprocessed and resampled to a smaler size
event3.wav (placed between 5/6sec - 16k)