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Sferic detection and localisation with DSP
Hi,
My project is to realise an handheld lightning locator designed around a Digital Signal Processor. From what i learnt about lightning, i think i can detect storm by detecting sferic signals. For the detection, i think that just an antenna+ADC+ FIR filter will be enough but for the localisation i don't know how to do. Should i make a FFT? I thought that as the high frequencies of the sferic signal (about 7-8 KHz) move more rapidly than the lowest, i could determine the distance of the storm from the determination of the time between the arrival of the high frequencies and the lowest ones. What do you think about that? Does a FFT allow me to do that? I'll be grateful for your help!! Thanks. |