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Dick Rollema wrote:
<blockquote TYPE=CITE><b><font size=+0>To Reg, G4FGQ and the LF-group</font></b>
<p><b><font size=+0>Reg, G4FGQ wrote:</font></b>
<p><font size=+0>Yes, I am aware of that. But I am interested in
the extent to which VLF</font>
<blockquote type=cite class=cite cite><font size=+0>predicting capability
of program GrndWav3 is affected by skywaves. It would</font>
<br><font size=+0>be nice to state confidence limits on predicting error,
+ or - dB or</font>
<br><font size=+0>something like that.</font>
<p><font size=+0>Any info is better than none. I have no means of making
any measurements</font>
<br><font size=+0>myself. So should some very inacurate data turn
up it would be of</font>
<br><font size=+0>interest.</font></blockquote>
<b><font size=+0>I would like to provide this data. But my problem is that
in order to do a reliable measurement the signal has to be sufficiently
over the local noise level. This means it must be about S6 or more. Signals
you would like to be measured do not come up to that level.</font></b>
<br><b><font size=+0>But in order to find out whether a signal is affected
by sky wave you could monitor the strong commercial stations adjacent to
our LF band. When they vary in strength with time that is an indication
there is a mix of ground and skywave.</font></b>
<p><b><font size=+0>73, Dick, PA0SE</font></b></blockquote>
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