This one has a larger span and you can see the 27 day periods.
https://www.solen.info/solar/images/swind.png
73 Henk
Op 6-11-2020 om 22:52 schreef Henk Remijn PA5KT via Topband:
My experience is that 160 conditions are also influenced by the solar
wind.
https://solen.info/solar/indices.html.
This graph shows SFI and solar wind. When solar winds are up to 300
km/s the conditions are usually good on 160.
This happened in the beginning of october. Conditions in the week
before the Stew Perry TBDC were good, During the contest it was less.
Due to the rotation of the Sun in approx 27 days you can a bit predict
if it is useful to be on the band.
Other might have other experiences.
73 Henk PA5KT
Op 6-11-2020 om 21:55 schreef Artek Manuals:
Bill
Last night ON 160 I worked 32 European and SA stations with the
reported SFI of 88. earlier in the week with a similar SFI number I
heard nothing from EU on 160. Conclusion : At these levels SFI is not
the factor
Conditions on 15 and 12 have been for the last week or so been great
. Lots of long path on 40 through 15 depending on the time of day &
band. certainly far better than a year ago at SFI of 68-72 on the
upper bands, on 160 and 80 hasn't been much of factor so far
DAVE
nr1dx
On 11/6/2020 3:23 PM, Bill Stewart wrote:
Per WWV, the solar flux is at 91. What, if any, affect does this
have on propagation in HF or other
frequency bands....and of course 160 meters. I have seen these
geophysical numbers often, but
never really understood what they meant. The flux has been running
in the high 60s/low 70s until
a few weeks ago when I saw it in the 80s.
Tnx de Bill K4JYS
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