[Aavso-sid-list] RE: Mysterious steps

[Andrew Clerkin]

Dusty,

When I tune to the transmitter in Puerto Rico (40.75 kHz) my receiver is 
very sensitive to local interference from electrical devices in my house 
such as PC's and monitors. The trace will jump up or down to a different 
level and then continue a normal trace just at a different level. I'm not 
positive, but I suspect that you may have some local interference which both 
of the frequencies you are recording are sensitive to, causing both both 
traces to jump to a new level at the same time and then continue normally at 
that new level. Then when the interference stops or changes you get the 
change in levels again.

Andy


>From: Dusty Samouce <samouce2 at netscape.com>
>Reply-To: samouce2 at netscape.com
>To: "SID  5" <aclerkin at email.msn.com>, "SID  1" <ahowe at frii.com>,"SID  2" 
><ChrisAtUpw at aol.com>, "SID  4" <Noatak at aol.com>,"SID  3" 
><welch at physics.mcmaster.ca>,"SID  6" <SID at sun.stanford.edu>,0 SID ALERT 
><aavso-sid-list at aavso.org>,"Deborah  Scherrer" 
><dscherrer at solar.stanford.edu>
>Subject: Mysterious steps
>Date: Thu, 16 Feb 2006 21:17:06 -0800 (PST)
>
>Looking
>at the attached VLF chart you will note rather curious steps at 1603 UT
>and 2244 UT.  What really puzzles me is that they occurred at both
>stations at the same time.  NLK (Seattle, WA) is about 500 miles
>to my west and NML (LaMoure, ND) is about 600 miles to my east. 
>So why is their drop and recovery coincidental?
>  Dusty
>
> 
>Netscape. just the net you need


><< 0602161100VLF.jpg >>