FW: Automated real time sporadic-E detection

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Dr. Nathaniel A. Frissell Ph.D.

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Aug 18, 2021, 9:36:31 AMAug 18
to ham...@googlegroups.com, dono...@erols.com

Hi everyone,

 

Here is an article that caught Frank W3LPL’s interest, and might also be of interest to people here on the list. He said I could share this with you.

 

73 Nathaniel W2NAF

 

From: dono...@erols.com <dono...@erols.com>
Sent: Saturday, August 14, 2021 9:32 AM
Subject: Automated real time sporadic-E detection

 

This is one of the best articles I've ever read about automated real

time sporadic-E detection.   There's a very big opportunity for citizen

scientists (hams) to make a big contribution to science by

implementing a global network of sporadic-E detection beacons and

receivers. 100 watt beacons would be desirable for improved

performance with omni-directional vertically polarized antennas,

perhaps with error correcting codes to further improve performance.

This could also provide rationale for at least a sliver 40 MHz ham

band.

 

 

On a related point, the article discusses well known aspects of

propagation that are widelunderstood in the professional community

but very little understood in the amateur community because

literature available to the amateur community doesn't cover it,

including the propagation chapters in the Antenna Handbook and the

Radio Amateur's Handbook.

 

Some of the well known aspects of propagation discussed in the

article but not adequately covered (or not covered at all) in amateur

publications includes:

   - the positive and negative phases of geomagnetic storms

   - every day E region blanketing of 40 meter F region propagation  (usually called "absorption" by hams)

   - frequent sporadic-e blanketing of the F region (usually called "absorption" by hams)

   - frequent daytime F1 region blanketing of the F region during

      summer daytime at mid latitudes and year round at low latitudes (usually called "absorption" by hams)

   - night time sporadic-E that sometimes blankets the F region (usually called "absorption" by hams)

   - night time F1 region blanketing of the F region (usually called "absorption" by hams)

 

73

Frank

W3LPL

   

 

 

 

Dave

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Aug 18, 2021, 10:48:13 AMAug 18
to ham...@googlegroups.com
Thanks for sharing!!

I would love to see this... I used to use the KATU-TV aural carrier as
a source for watching Ionospheric Doppler-- alas, the change to HD-TV
ended that.

I have been looking for a good source of 50 or so MHz. non FM carrier
around 100 or so miles from me for years now...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 8/18/21 6:36 AM, Dr. Nathaniel A. Frissell Ph.D. wrote:
> Hi everyone,
>
> Here is an article that caught Frank W3LPL’s interest, and might also be
> of interest to people here on the list. He said I could share this with you.
>
> 73 Nathaniel W2NAF
>
> *From:* dono...@erols.com <dono...@erols.com>
> *Sent:* Saturday, August 14, 2021 9:32 AM
> *Subject:* Automated real time sporadic-E detection
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