Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

RE: LF: Daytime 29.499 kHz - ice and all

To: "[email protected]" <[email protected]>
Subject: RE: LF: Daytime 29.499 kHz - ice and all
From: Bob Raide <[email protected]>
Date: Sun, 9 Mar 2014 15:18:22 -0400
Authentication-results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of [email protected]) smtp.mail=[email protected]
Delivered-to: [email protected]
Importance: Normal
In-reply-to: <[email protected]>
References: <[email protected]>,<[email protected]>,<FA723BF050144798AD076EB0C9190D21@White>,<[email protected]>,<[email protected]>,<A47BA5540C3B42619C724008CDF3A0ED@White>,<[email protected]>,<2FC5CAB271A6437CB35A5B100185CEDA@White>,<[email protected]>,<7DB9DD5669FC4C648838510DCAC08AFB@White> <[email protected]>,<[email protected]> <[email protected]>,<[email protected]>,<850A470A5B9F4483BED8B49D4791044A@White>,<[email protected]>,<[email protected]>,<[email protected]>,<[email protected]>,<[email protected]>,<76F90E9771CA44F3981F679241E1A005@White>,<[email protected]>,<008b01cf3bac$c9568ce0$6401a8c0@JAYDELL>,<023F5ED8BC044897ACDC94AEECD5F1D0@White>,<[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Laurence;
Will run key down carrier here tonight start 2300 till 0400 when go to OP2H for 2 rounds [0800].  Carrier may show something-Bob
 

From: [email protected]
To: [email protected]
Date: Sun, 9 Mar 2014 11:11:06 -0800
Subject: RE: LF: Daytime 29.499 kHz - ice and all

Jay - these plots are intriguing  -perhaps Im reading the graphs wrong and should turn the pages upside down :-)  I got to say I never see WWVB signals at the levels indicated for Anchorage but of course I have to deal with JJY too co-channel which do reaches these levels -hmm...  and if I compare signal to noise wise for the average Joe not a lot of people buy WWVB locked devices as they just dont work up here. See http://www.nist.gov/pml/div688/grp40/vb-coverage.cfm  we never go Red, and notice the affect of the Rockies etc
 
What with VLF phase changes of Polar ice caps and perma frost causing higher loss modal paths, reflections from Mountain ranges causing standing waves, Moon/Sun tidal losses, effects from Red Sprites, Solar Proton events, Man kind globally causing VLF background noise increase and more so during the work week,  high modal losses East West Im surprised I see anything here...(grin)
 
There are a lot of papers out there on VLF profiling over various grounds, some interesting facts on reflection coefficients' on vertical incidents of VLF waves into glaciated areas etc.....and a lot more.
 
I think someone mentioned Siple2 and its VLF dipole - Siple was about 3400ft ASL but I cant recall if the actual continental land mass is pushed lower cos of the weight of the ice = in any case most of what I can recall was my breakfast cutlery and the kitchen utensils humming musically whilst Jupiter was running - I was surprised it didnt drive the guys mad who were stationed there all the time...
 
No sign of /1 yesterday, well not a clear one - I did get a straight line of a few pixels just pre sun down here but thats all.
 
Laurence KL7 L et al
 
 

 

From: [email protected]
To: [email protected]
Date: Sun, 9 Mar 2014 16:46:16 +0100
Subject: Re: LF: Daytime 29.499 kHz

Jay, are these plots based on measurement or simulation? 73, Markus

Sent: Sunday, March 09, 2014 4:32 PM
Subject: Re: LF: Daytime 29.499 kHz

While not VLF, WWVB at 60 kHz shows no significant difference in signal level at various receiving locations summer vs. winter.
 
 
As expected though, SNR is better in winter.
 
 
Hard to believe things would be vastly different at 30 kHz ... but suppose anything is possible.    
 
Jay W1VD  WD2XNS  WE2XGR/2  WG2XRS/2
 
 
<Prev in Thread] Current Thread [Next in Thread>