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| DRHOECKER (OP) User ID: 16728269 11/14/2012 08:39 PM Report Abusive Post Report Copyright Violation | OK WHAT MAKES FREQUENCY When a meteor strikes Earth’s atmosphere it decelerates rapidly. The friction created by the air causes the meteor to burn up at extremely high temperatures creating the white “shooting star” that we are all familiar with. This process also ionises the air along the trail making it possible to reflect radio waves. Utilising a high powered VHF radar signal sent into the sky, we are able to detect reflected waves from these ionisation trails. Because the meteor is moving, the reflected signal is shifted in "frequency "from the original, by an amount according to it’s speed. This shift is also heard as an audible ping by the station operator. Our system translates the reflected wave into three main parameters - Amplitude (strength), Frequency shift (Doppler shift) and decay time. This allows us to determine the relative size of the meteor strike (vertical scale) and the relative approximate speed and deceleration (amount of shift and width of the trace). SUBSTITUTE METEOR WITH RADIO WAVE. UNDERSTAND? WHAT I WROTE WAS THAT . I KNEW YOU WOULD NOT UNDRSTAND THE SUN IS COPYING THE CENTER OF CREATION BUT SMALLER . |