Stefan, did you try contacting any geophysisists in your area? Maybe they
have an ULF receiver, and could give you access to the data
jacek
On Tue, 5 Mar 2019, DK7FC wrote:
Date: Tue, 05 Mar 2019 19:44:42 +0100
From: DK7FC <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: ELF: Almost touching the ground... | 12.47 Hz
Hi ELF friends,
During the last 2 weeks i've done another experiment on ELF, this time on
12.47 Hz, the 24 Mm band (wavelength 24057 km). Again i've crossed the local
distance of 3.5 km. That's the lowest frequency i've ever been and it feels
like i can see the ground already :-)
The dimensions of everything down there are extreme. I've integrated 227
hours of a carrier transmission into one spectrum peak, it is shown in the
attachment in 1.25 uHz. This carrier could have transferred an EbNaut message
of nearly 100 characters.
The ERP was 50 attowatt or -163 dBW and the antenna current was 170 uA only,
despite about 5 kV antenna voltage.
I'm now trying to put a step below 10 Hz but the RX antenna becomes less
efficient with each Hz.
73, Stefan
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