The geomagnetic field has again been dead quiet (Kp=0) over the past day, affording a useful opportunity to create a 14MHz reference WSPR reception curve for VK3QN, beaming 130 long path to Europe.
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Dead quiet field.
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14MHz reception of VK3QN, WSPR (5W). TX: fixed 12 ele (130 degrees). RX: vertical delta loop.
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The first peak at around 06:30UT is when I have just emerged into the greyline, with VK3 still in afternoon daylight, and represents the longpath signal:
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06:30UT Image: DX Atlas, with permission.
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The second peak about 09:00UT is when VK3 goes into his evening greyline. Proppy HF shows that this situation is most likely to be a weakening long path signal, supplemented with a fair degree of shortpath leakage from the back of the beam:
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09UT
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The irregular, weakest peak at 11-12UT is now probably solely shortpath leakage from the rear of the large 12 element array. At 12:40UT, the signal from VK3QN is lost altogether:
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12UT
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