NIL HEARDRECEPTION LOG

VLF submarine band 23.3-25.7 kHz (DHO38, NAA, Russia, Turkey chord)

tier A · mixed

23 kHz USB · 2026-10-04 18:32:11Z · 05:06 · received at Hamburg, Drage, 🇩🇪 Germany 🇩🇪

Spectrogram of VLF submarine band 23.3-25.7 kHz (DHO38, NAA, Russia, Turkey chord), 23 kHz USB, 2026-10-04 18:32:11Z, 05:06: mixed 100%
spectrogram 0–6.0 kHz · analysis blocks: mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 5.0 MB ⤓ Opus 1287 kB { }
What was heard
mixed 100%. Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Hamburg, Drage, 🇩🇪 Germany 🇩🇪 (JO53dk) · VLF broadband vertical V1.2 08/26 · reported SNR 43 dB — thanks to the operator. Receivers
Provenance
sha256 f97b2679383b37a9a487b0e3202baa5f517a8b9313c2eb2eeb296d3b0fedf81b
source 05:06 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-04T1832Z-23-vlf-23000
Heard in the record
— linked once the record exists.
Licence
CC BY 4.0 — credit NIL HEARD / Reception Log. The recording is ours; the transmission is somebody else's. Descriptions describe sound, never content — why.
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