From: <hvanesce@comcast.net>
To: <rsgb_lf_group@blacksheep.org>
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Date: Thu, 8 Jun 2017 03:06:10 -0400
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Subject: RE: LF: DK7FC in Todmorden at 2970 Hz
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Stefan,

Yes, working on a 1E-1 to 1E1 Hz plot now. Very interested in what FDTD thinks 1E-1 to 1E0 kHz looks like.  Guessing 1E-1 to 1E0 Hz will be smooth but even in that case it's hard to guess at what lower frequency the 10dB difference between FDTD and NAVELEX at 1E0 Hz will diminish to 3dB or less. 

73,

Jim AA5BW


-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of DK7FC
Sent: Wednesday, June 7, 2017 2:50 AM
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: DK7FC in Todmorden at 2970 Hz

Hello Jim,

Can you extend that plot to 1E-1...1E1 kHz?

73, Stefan

Am 07.06.2017 03:07, schrieb hvanesce@comcast.net:
> Paul,
>
> Thanks for your reply below. In available time I'm trying to verify that FDTD can be helpful for the ULF tests (and vice versa, that the ULF experimental results can validate FDTD for ULF).  So far I've found three positive indicators based on Stefan's tests at 2.97 kHz. One indicator is correlation of (a) extrapolated signal strength Cumiana/Todmorden, adjusted for antenna current (and including error margin for estimated sensitivity at Cumiana), with (b) the FDTD characteristics in the attached. For that purpose (particularly for comparing signal strengths extrapolated from SNR at known integration time and estimated receiver sensitivity), should I consider the effective integration time of your 9-day stack of 11-hour segments to be 356400 seconds i.e. bandwidth 2.8 uHz?
>
> Thanks,
>
> Jim AA5BW
>