Lightning oscillations
#7
Jim, if you're wearing 'sombreros' (Mexican Hats), you're getting skywaves... generally it's a 'skywave' if it's further than about 80lm /50mi. One issue with detecting Skywaves, is the time of group arrival Zero Crossings are also distorted, So in addition to 'built in" distance and timing location deviation, the TOGA iterations also won't be as accurate... so location accuracy suffers. (One reason so many primary detectors are used, along with another 6-8 secondaries, for computation...

Pasense
The Primer might get extended... but there is not much than can be added that isn't already referenced somewhere,... being a hobby... and certainly no extensions should be made without input and approval of the developers, simply because this is built around a specialized, hobby concept... though it certainly ranks with most any commercial system... beyond the basics, it's pretty much up to each of us to experiment, study, etc.  especially troubleshooting and 'noise'..;. those can't often be done long distance... each operator has to figure it out.

About polarity and strength, type of stroke ... Both Red and Blue theoretically, by design, as far as we know, CAN supply data for polarity, and stroke type (CG, IC, CC) ... however, strength of a strike in any system would always be a 'best guess'... as with altitude. altitude is a real dream world... almost impossible...

For polarity, the BLUE virtually has that built in... the third channel H field can be used with the third antenna oriented to detect the horizontally polarized H impulse..eg, ferrites are normally mounted horizontal, responding to the more common Vertically Polarized impulses... the third antenna could mount Vertically, for detection of NEARBY horizontally polarized strokes. Experimentation encouraged, but the system isn't yet set up for it, because...
.. a big IF.... everybody operated with the same antennas, similar configuration,for starters, the polarity algorithms etc might already be implemented along with betas for CC, IC types.. Another drawback is Egon, Richo, and Tobi have full time vocations and lives outside Blitzortung, so are limited at many times on their available time and energy for development and implementation. 

The illustrated signals you asked  about are H channel 1 signals from my system red, The E channel signals would be similar, with some phasing differences.  Note that E channel is really designed  Vertically polarized sigs  <800km or so not distant signals.  The goal was to use that in some of the advanced stroke parameters. Many operators are using that field for distant, so there is a big variance in data assumptions.

Speculation: The term "H field" for the magnetic portion is probably used so everything references to "vacuum", and allowing for antenna type differences... also the math computation may be simpler overall, rather than trying to derive everything necessary for thousands of stations, that would be required for "B"... then you've got the 'bound' fields,, "M", and remembering that changes in B produce changes in E and vice versa... and... and.. so, we just use H for discussion simplicity.... sort of like NOT referring to "Tuning up my station"... we don't wont any 'tuning'... we 'optimize.. Rolleyes

Stations: 689, 791, 1439
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Messages In This Thread
Lightning oscillations - by jimlucke - 2017-01-13, 15:37
RE: Lightning oscillations - by RichoAnd - 2017-01-14, 11:40
RE: Lightning oscillations - by jimlucke - 2017-01-15, 11:05
RE: Lightning oscillations - by cutty - 2017-01-15, 16:41
RE: Lightning oscillations - by jimlucke - 2017-01-16, 17:59
RE: Lightning oscillations - by pasense - 2017-01-16, 18:29
RE: Lightning oscillations - by cutty - 2017-01-16, 19:12
RE: Lightning oscillations - by jimlucke - 2017-01-17, 11:38
RE: Lightning oscillations - by allsorts - 2017-01-20, 01:46



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