Topband: greyline prop forecast

[donovanf at starpower.net]

Hi Kris, 


There's no substitute for butt in chair time if you want to work grey 
line long path DX on 80 meters. 160 meters is also possible, but 
much more difficult. 


Just check your local sunrise/sunset times and the sunrise/sunset 
times in your target area and sit your butt in your chair especially 
during the 30 minutes leading up to sunrise at the eastern end of 
the path. 


While we've been discussing this topic, at least half a dozen east 
coast USA 80 meter DXers worked XX9D on the 80 meter greyline 
longpath at about 2300Z and none of us were aided by forecasts. 
Imagine that... 



I know of no 80 meter DXer who has achieved greyline long path 
success through forecasts, nor do we know of any technical 
breakthroughs on the horizon that will change this in the foreseeable 
future. 


73 
Frank 
W3LPL 

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

From: "N5KM - Kris" <n5kilomike at gmail.com> 
To: topband at contesting.com 
Sent: Friday, February 17, 2017 11:25:32 AM 
Subject: Re: Topband: greyline prop forecast 

Hi Carl, 

Well, I guess I was cheating a bit by posting here. I was hoping the folks 
who 
dwell here might be more knowledgeable about propagation than other forums. 
(You prove my case. Hi.) 

I've been concentrating on the lowbands (160m and 80m) so my question really 
was concerning 80m greyline propagation. I acknowledge the vagaries of 160m 
propagation, as you have described. I was just curious if greyline 
propagation 
can be predicted the way SP/LP can be. 

73, 

Kris N5KM 


Date: Thu, 16 Feb 2017 11:15:12 -0500 
> From: Carl Luetzelschwab <carlluetzelschwab at gmail.com> 
> To: topband at contesting.com 
> Subject: Topband: greyline prop forecast 
> Message-ID: 
> <CAAx1FFHzM7UFi5kHSvNZR7PaXRm=k=mKyFK9PmTa0Abxu5c2uA at mail. 
> gmail.com> 
> Content-Type: text/plain; charset=UTF-8 
> 
> Kris N5KM asked about greyline propagation predictions. Since his question 
> was posted to the topband reflector, I assume he's only asking in relation 
> to 160-Meters. 
> 
> We do not have any reliable propagation predictions for greyline on 160m. 
> In fact, we really don't have any reliable propagation predictions for any 
> time on 160m. In other words, we do not know in advance what night is going 
> to be good and what night is not going to be good. 
> 
> The best thing to do is know the common darkness times between you and your 
> target, and know sunrise and sunset times at both ends of the path. Make 
> sure you're on when it's dark and make sure you're on around the 
> appropriate sunrise/sunset times. 
> 
> I agree that it would be nice to know when 160m is good, but we're simply 
> not there yet. My guess is we will not even see this in our lifetimes as 
> there is no continual data being taken in the lower ionosphere to gives us 
> clues as to what's going on. 
> 
> So get on and enjoy the magic of topband when it happens. 
> 
> Carl K9LA 
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