Anyway this power is much lower the power needed to observe 'normal whistler' man-generated. Reason is simple: requred energy 'expanded' in time. Seems factor should be ~10^4 or more? Regards, Alexan
Dear LF, let's describe yet another kite-ant design for 9 kHz. Let it be trianle loop elevated by a kite up to 100m. Base of triangle (parallel to earth) assumed as 200m, height -- 100m, wire -- 2mm
HAM communications should NOT be reliable communications, Mal. Certanly for professional communications this is very funny idea. But we are about HAMing. This is PLAY, but it is a nice play:-) Regard
It is one point yet. Let's wait for 3-4 at least. True, true. I am familar with such problems but mainly in condensed matter (particulary magneto-optics) not in plasma physics. But electrodynamics it
Paul, can you give a reference (http is better, say arxive.org) to some review paper on cooperative effects in ionosphere? What does it mean? You mentioned 'cooperative D-layer' before. But i have ne
OK. I had misunderstand you. Certanly it will be good if amateurs cooperate with researchers. It seems to me vlf (or may be lf at least) is the only area where HAM's experiments can have some reseach
Anyway this is a new record on 9 kHz:-) Congadulations! Remember, this is well out of near reactive zone. Thus field decreases as 1/D and if you increase voltage to 20 kV then distance will be 20:1.6
Oh, sorry. I undestand that there was some signal but decode nothing. This is a mistake. 1.3 uV/m seems to yeld some weak trace in long QRSS. Somthing with rx part or noise is higher then we expected
Certanly exponential factor exp(-r/a) should be present. I mentioned this before. But i have no ideas how to estimate roughly (at least) parameter (length) a. Intuitively i expect a = few of 1000s km
Dear Markus, your calculations are fully adequate only while ionosphere does not work. I.e. for less then about 100 km (very approximative). At 180 km and 800 km ionosphere influence is certanly wort
To decrease frequency seems not good idea on my opinion. Noise decreases but radiation should decreases much more. This is intuitivelly but. Regards, Alexander
Paul, QRSS10 dots means 10 sec radiation then 10 sec pause. Then again 10 sec radiation and so on. I expect when signal was not broaded at the begining it was Stefan's tuning. After 16:30 as Markus m
Dear Paul, i tried send answer to your mail but it is unsecessfuly. Mail rejected i din't know why. Someone wrong with your mail box? Just now i leave my home and i'll be offline for a week or so. I'
By the way one can imagine some 'reverse whistler' if TX radiate apropriate FM signal which is 'de-chirped' by dispersion in ionosphere. Can you roughly estimate radiated power needed to observe such
Dear Stefan, there was no such a problem (seems to me) in Markus experiment with 10kV. May by with 20kV... But anyway corona protected rings (rather small i think) to be usefull on the ends of wire.
(JMarkus, you got Stefan's sigs in QRSS10, not in QRSS100?? True? Wow! (B (JOn Mon, 15 Mar 2010, Markus Vester wrote: (B (J> (B (J> talked to Stefan on the cellphone about an hour ago. You can imagin
Such scepticist you are, Mal. Any data can be analysed. By the way frquency is some ID by itself. And certanly we are looking for more proof. Regards, Alexander
