NIL HEARDRECEPTION LOG

WWV time signal

tier A · keyed-tone

10000 kHz AM · 2026-09-23 12:30:06Z · 10:00 · received at Wessex - KiwiSDR - G8JNJ - South West UK

Spectrogram of WWV time signal, 10000 kHz AM, 2026-09-23 12:30:06Z, 10:00: keyed-tone 73% · carrier 13% · morse 13% · tone 3972 Hz · keying 0.25 Hz depth 0.84
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.1 MB ⤓ Opus 2297 kB { }
What was heard
keyed-tone 73% · carrier 13% · morse 13% · tone 3972 Hz · keying 0.25 Hz depth 0.84 — dominant tone 3972 Hz, keyed at 0.25 Hz (depth 0.84). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Wessex - KiwiSDR - G8JNJ - South West UK (IO80qr) · (same as Wessex KiWi V1) · reported SNR 28 dB — thanks to the operator. Receivers
Provenance
sha256 4df27f1ff5c93a567ef48e2e783bb3f425090821ccd47bb9d2cf1460beb7358d
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T1230Z-10000-wwv-10000
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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