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Re: [IRCA] propagation article

Once again, Google is our friend:


https://www.swpc.noaa.gov/products/station-k-and-indices

Station K and A Indices | NOAA / NWS Space Weather Prediction Center<https://www.swpc.noaa.gov/products/station-k-and-indices>
www.swpc.noaa.gov
The Station A and K indices show the fluctuations in the magnetic field, tied to specific geographic locations. The indices have a range from 0 to 9 and are directly related to the maximum amount of fluctuation (relative to a quiet day) in the geomagnetic field over a three-hour interval.




Russ Edmunds

WB2BJH

Blue Bell, PA

Grid FN20id

________________________________
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Nick Hall-Patch <nhp@xxxxxxxx>
Sent: Saturday, November 24, 2018 5:56:38 PM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] propagation article

This is one of these "I don't know why I bother bookmarking anything"
moments.  It's the Canadian government, so the websites will be
shuffled around on a weekly basis.   I should just create a bookmarks
list that links to "404"

OK, rant over.  Some searching gave me these soon to be out of date links:

http://geomag.nrcan.gc.ca/plot-tracee/ssp-1-en.php gives you the last
24 hours of magnetic observatory plots, but it's raw, no K-indices
which are only calculated for three southerly observatories
http://geomag.nrcan.gc.ca/data-donnee/indices/si-en.php will get you
historical K-indices for those observatories, but it's months out of date

Otherwise
http://geomag.nrcan.gc.ca/data-donnee/indices/si-vi-en.php?type=hourly_ranges
will get  of raw geomagnetism at all the observatories until quite recently..

They have a plotting service, which which also shows you a map of the
magnetic observatory locations:

http://geomag.nrcan.gc.ca/plot-tracee/mp-en.php?format=html

but again, raw geomagnetism.   Anyone know how to calculate K indices?

I have heard that "IT technicalities are preventing us from
automatically providing up to date k indices on the web site.", so
possibly some day they may return?

They used to have a mailing list to which you could subscribe, but
that has also been shot down by
"IT technicalities ".

There still is a service to which you could subscribe, which predicts
daily geomagnetic conditions in the sub-auroral, auroral and polar
cap regions, but darned if I can find out how to become a new
subscriber.   I may be able to find out if anyone is interested, but
I'd hate to shoot down a skunk works operation, hi.

best wishes,

Nick





At 22:14 2018-11-24, Neil Kazaross wrote:
>One thing we all agree on is the desire for very low geomagnetic activity
>for TP/TA. I also think he's right that we should be looking at Canadian
>Arctic K indexes. How do we find those?  73 KAZ
>
>On Sat, Nov 24, 2018 at 2:36 PM Russ Edmunds <wb2bjh@xxxxxxx> wrote:
>
> >
> > There was one part of the discussion that was a bit unclear. I wasn't sure
> > if they meant "under" the absorption zone to mean "South of it" or to mean
> > "traversing beneath" the absorption or interchangeably both. If there was
> > an intent for "beneath", then I'd have expected a further discussion of
> > paths going  over ( above ) the absorption.  At MW, we likely see
> all three.
> >
> >
> > Russ Edmunds
> >
> > WB2BJH
> >
> > Blue Bell, PA
> >
> > Grid FN20id
> >
> > ________________________________
> > From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Mark Durenberger <
> > Mark4@xxxxxxxxxxxxxxx>
> > Sent: Saturday, November 24, 2018 3:14:45 PM
> > To: 'Mark Connelly'; CapeDX@xxxxxxxxxxxxxxx; irca@xxxxxxxxxxxxxxxx
> > Subject: Re: [IRCA] propagation article
> >
> > GREAT piece!  Mark, thanks for sharing.
> >
> >
> > Cheers!
> >
> > Mark Durenberger
> >
> > -----Original Message-----
> > From: Mark Connelly <markwa1ion@xxxxxxx>
> > Sent: Saturday, November 24, 2018 1:01 PM
> > To: CapeDX@xxxxxxxxxxxxxxx; irca@xxxxxxxxxxxxxxxx
> > Subject: propagation article
> >
> > Maybe of some relevance to MW DX:
> > <<Here is an interesting pdf document including information on the effects
> > of Earth's Electron Gyrofrequency on 160 meters.
> >
> > The 160-Meter Band: An Enigma Shrouded in Mystery
> > http://solar.spacew.com/cq/cqmar98.pdf
> >
> > Jerry, K4SAV>>
> >
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Nick Hall-Patch
Victoria, BC
Canada

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