Hello Jacek,
Am 05.03.2019 22:03, schrieb Jacek Lipkowski:
Stefan, did you try contacting any geophysisists in your area? Maybe
they have an ULF receiver, and could give you access to the data
No, i didn't. I doubt that they have sensitive receivers with the
necessary signal stability. Also the RX must watch for days without an
interruption and the distance must not be much higher than 5 km.
BTW did you receive your 8270 Hz signals on your own receiver in Warsaw?
73, Stefan
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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