NIL HEARDRECEPTION LOG

RAF VOLMET

tier A · voice

5450 kHz USB · 2026-09-19 20:04:32Z · 10:00 · received at Hamburg, Drage, 🇩🇪 Germany 🇩🇪

Spectrogram of RAF VOLMET, 5450 kHz USB, 2026-09-19 20:04:32Z, 10:00: voice 40% · carrier 30% · keyed-tone 17% · mixed 13% · tone 381 Hz · keying 0.45 Hz depth 0.94
spectrogram 0–6.0 kHz · analysis blocks: voice keyed-tone carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 9.9 MB ⤓ Opus 2616 kB { }
What was heard
voice 40% · carrier 30% · keyed-tone 17% · mixed 13% · tone 381 Hz · keying 0.45 Hz depth 0.94 — dominant tone 381 Hz, keyed at 0.45 Hz (depth 0.94). 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 84815ce242c847bcda40d43d9cfd8c2a170d7a65c4910aebce42983f231bdd17
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-19T2004Z-5450-volmet-5450
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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