[Lowfer] abrupt LOS

[jrusgrove at comcast.net]

Garry

Thanks for your morning updates. Since I don't normally see WMS and UWL except under very good condx 
it's good to get info on their operations.

In the past I don't recall the 'drop off the cliff' on Andy's signal - more like a slow fade out as 
in SIW's signal on the same capture from this morning. A curious effect but probably nothing 
significant.

Jay



----- Original Message ----- 
From: "Garry Hess" <k3siw at sbcglobal.net>
To: <lowfer at mailman.qth.net>
Sent: Sunday, October 17, 2010 9:05 AM
Subject: Re: [Lowfer] abrupt LOS


> Jay, I wasn't monitoring lowfers this morning around sunrise but recall
> WEB typically disappears mid-dit or dash. The 500 kHz stations WD2XSH/6
> and /7 are much stronger but they nosedive as well in a matter of a few
> minutes with sunrise. Figured the D layer was rather like a switch -
> turn on when dark, turn off when sunlit. Might be interesting to monitor
> lowfers during an eclipse.
>
> Copied XR well here through the night (0400Z-0815Z) and got two full
> callsigns from WMS using QRSS30, slow. The first was around 0430Z, the
> second around 0530Z. Still nothing definite from UWL.
>
> Conditions were good here around local sunrise to the west, allowing NDB
> LLD on 350 kHz to be copied the first time this "season".
>
> 73, Garry, K3SIW, EN52ta, Elgin, IL
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