Tuesday 16 November 2021

G0 and G2 compared

 A very useful set of geomagnetic conditions over the past 48 hours, where we generally saw G0 on 14-15/11/2021, and about G2 on 15-16/11/2021.

This allowed a direct comparison of how the 10MHz WSPR (1W) signal to DP0GVN from Wales varied.  The difference in geomagnetic activity was slight, but the effects are still clear, notably in the couple of hours or so after 00UT, where under G0, there were no spots, but under G2, there were many. 

My signal was propagated at a weaker strength after midnight in the second day, at a minimum of around -19dB, whereas it was a weakest of -15dB on day 1 - a power difference of 2.5 times.  So the change wasn't simply down to difference in timing between the geomagnetic disturbances.

I've placed two days' worth of magnetometry plots above the WSPR data, which is NOT to the same timescale as the WSPR plot.  It is there simply for you to see the difference in the two days.

DP0GVN receiving my 1W, 10MHz WSPR signal.

Meanwhile, EA8BFK first saw an enhancement in my signal, also at 10MHz, and then a significant dip at aroun 00:30UT, quickly restoring by 01:00-01:30UT, and then undergoing actually quite interesting, periodic changes in strength.

EA8BFK receiving my 10MHz 1W WSPR signal (15-16/11/2021).



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