12 Aug 2009

10m WSPR QRP DX - Perseids MS?

I ran WSPR with 5W out (20%) on 10m overnight and was heard twice by F4VNS in JN36hc (see report screen). Although I did not decode anyone on 10m overnight, this may be because there were few stations active on 10m WSPR. The few whispy traces seen suggest doppler shifting (possible MS)?

Anyone know when the Perseids peaked in Europe? I wonder if between 0230 and 0430z?


g4ilo said...

That's very interesting, Roger. I would have said that WSPR was unsuitable for MS because it is a weak signal mode designed for relatively steady propagation whereas MS gives you short bursts of fairly strong signals. Therefore the 2 minute cycle is far to long for the average meteor burst. JT6M is not such a weak signal mode but it is designed to get the message across in a much shorter period taking advantage of short bursts. However the weak fuzzy wandering traces shown on the screenshot make MS a plausible explanation.

Roger G3XBM said...

My theory is the Perseids shower would have given some very long bursts and maybe these were just long enough for a couple of WSPR transmissions to make it via the ionised trail. Or it could have been a short spor-E opening. It would be good to see a screenshot from F4VNS of my signals at 0250 and 0430. I note one has -3 drift which could be Doppler to some degree?