QuantumLogic
Jedi
Re: Explosion hits fertilizer plant north of Waco, Texas
That makes sense with the solar exposure affecting the ion count in periods of light vs. periods of darkness. With your knowledge, any idea as to what could cause a data gap in instrumentation like this? This is beginning to take the thread off topic, so this will be my last question on this. Thanks for the explanations.
LQB said:QuantumLogic said:LQB said:QL - Nuc weapon technology has certainly progressed in who knows what areas - but suppressing the EMP would be a very tough one. I don't really know, but I doubt it.
30+ years ago I did design work on a NEMP detection and geolocation system that used HF (1-30MHz) antenna arrays in remote areas of the world and combined their detections via the signal bounce from the ionosphere. The purpose was to locate the source of the detonation and use the HF response to diagnose the type of detonation and infer design characteristics of the bomb. There was never an issue with signal-to-noise ratio.
That is very interesting work you did. The reason I ask is because I was looking at a 1-30 MHz spectrum waterfall chart this morning and noticed something odd. It is a gap in data that lasts approximately 45 minutes. But to me the time index seems off from matching up with the West, Texas event. Would you mind looking at this since you have prior experience with this. I realize the data gap could be caused by any number of things, so it may be nothing.
The vertical periodicity you see (with freq) are probably PRF lines associated with the pulsed waveform spectrum. These are modulated in time (x-axis) by day/night variations in the ion content of the various layers of the ionosphere. Look along the vertical axis at t=00 and t=24 - they are essentially the same. So the variations you see in between are due to day/night ionosphere variations. That is the best I can do without knowing more about the waveform and the measurement.
That makes sense with the solar exposure affecting the ion count in periods of light vs. periods of darkness. With your knowledge, any idea as to what could cause a data gap in instrumentation like this? This is beginning to take the thread off topic, so this will be my last question on this. Thanks for the explanations.