Re: LF: Over the Pole and far far away

["Alan Melia" <alan.melia@btinternet.com>]

Hi Laurence, MMmmm that is pretty bad. I got hold of a Hargreaves (at great expense from Amazon) It confirms my musing about Dst and absorption of RF but I cant find any other major attenuation mechanisms other than multipath fading and "leakage". That length of poor conditions cannot be either of these really....I know Polar paths are "odd" because of the auroral region, with signals passing under or through the "curtain" but I still cant put a finger on this one.

 

BTW if you google "The Solar Terrestrial Environment" by Hargreaves you will find there is a partial scan ...in fact there are large portions and the book does say a lot about high lattitude regions....I cant remember now whether than was via Amazon or not.

 

Alan

----- Original Message -----

From: Laurence KL7 L

To: rsgb_lf_group@blacksheep.org

Sent: Wednesday, September 18, 2013 1:21 AM

Subject: Re: LF: Over the Pole and far far away

Alan - ive not seen any transpolar ( love that word) openings yet at all since the sun has gone period. By this  time last year dcf39 was there up to audible levels at times 

You watch it will open tonite just to get us scratching the cranium even more . 

Another mechanism im sure here and I need to read more books. Im happy with the rx system gains and overall s/ns and cant do much more 

We will see how autumn goes- snow is down to 2500ft so I need to get the cables finished before i loose them in the White stuff. 

Laurence KL7 L

On Sep 17, 2013, at 14:10, "Alan Melia" <alan.melia@btinternet.com> wrote:

Hi Laurence yes its possible the proton didnt seem to be up on NOAA and at this time of year there is still a reasonable amount of daylight so I dont really know I havent found any other mechanism that account for that amount of change. The Dst isnt brilliant but its not that bad and bouncing around a bit so there is nothing there to suggest big absorption. The only thing is the surprisingly quiet nature oof Solar actiity for this time in the cycle. How long has it been depressedthat badly with you??

 

Alan

----- Original Message -----

From: Laurence KL7 L

To: rsgb_lf_group@blacksheep.org

Sent: Tuesday, September 17, 2013 10:37 PM

Subject: RE: LF: Over the Pole and far far away

Thanks Alan - yep could be leakage but this morning I see the low/high Proton levels  were way up just for a short while and now back down to flat line too - though I see whe are going to get a little Coronal for a while.
 
This isnt just on LF MF but even HF is a little depressed -  so maybe a little kick of the present mid lat K3 will help.  Odd stuff this... DCF39 is something like >50dBr or more down on where it was this time last year (on a good day)
 
Even the Path to Texas wasnt good last night at MF. Cheers from a snowy hilled Alaska
 
 
Laurence KL 7 L
 

---

From: alan.melia@btinternet.com
To: rsgb_lf_group@blacksheep.org
Date: Tue, 17 Sep 2013 19:11:12 +0100
Subject: Re: LF: Over the Pole and far far away

Hi Laurence, thaksor your observations. It does not seem to absorpyion by precipitated electrons. However the solar X-ray flux has been very quiet for some time now(which is a bit odd)  I wonder if we are suffering ionospheric leakage at least on your path. That is where not all th signal is refracted but a considerble portion goes right through the E layer out into space??

 

If that is the case what we might need is a minor geeomag storm to beef up the electron density again.

 

Alan G3NYK