On Thu, 4 Nov 2010 10:21:12 +0100
"Albert" <[email protected]> wrote:
> Jay, LF,
> This is just what WSPR is designed for.
Albert, Jay, LF,
Indeed it is!
One last comment, looking at the figures......
In the last 7 days the best reports SNR of a W station on WSPR
was :
2010-10-31 04:44 WD2XSH/12 0.501151 -1 0 DM79gx 2 KL7UK/5 EM26ar 903
That's -1dB SNR for 2W ERP at 903km....
Compared to a Eu spot over a simlar path length:
2010-10-28 20:40 PA0A 0.503901 +12 0 JO33de 5 GM4SLV IP90gg 917
+12dB SNR fir 5W ERP at a distance of 917km
There were no "super strong groundwave" reports from W stations - in
fact nothing in +ve SNR figures at all.
The best SNR for a potential Groundwave path was:
2010-10-31 01:52 WD2XSH/17 0.501090 -4 0 FN42pb 1 WE2XGR/2 FN31is 216
A mere -4dB SNR at 216km for a reported ERP of 1W - hardly bending the
needle!
Once you get to over +10dB then you're starting to talk about a strong
signal, but even then not likely to cause any problems. There have
been Eu spots up to +17dB this week.
All the high SNR spots in the database for the last 7 days are for Eu
stations - so I think it's a myth that the W stations running high
power to efficient antennas are going to wipe out the band over there.
Let's just use it and see how things go.
Regards,
John
GM4SLV
|
