NIL HEARDRECEPTION LOG

WWV time signal, 20 MHz (day)

tier A · keyed-tone

20000 kHz AM · 2026-09-26 21:21:30Z · 10:00 · received at Presque Isle, WI USA

Spectrogram of WWV time signal, 20 MHz (day), 20000 kHz AM, 2026-09-26 21:21:30Z, 10:00: noise 93% · keyed-tone 7% · tone 350 Hz · keying 0.90 Hz depth 0.88
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone noise
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 11.2 MB ⤓ Opus 2252 kB { }
What was heard
noise 93% · keyed-tone 7% · tone 350 Hz · keying 0.90 Hz depth 0.88 — dominant tone 350 Hz, keyed at 0.9 Hz (depth 0.88). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Presque Isle, WI USA (EN56ef) · 85 Meter Loop > 500 - 1500 kHz Filter > MCA104M Split · reported SNR 26 dB — thanks to the operator. Receivers
Provenance
sha256 922d3d9c09237628a5d077c479262a86c502f037aeb9273c0017562d79b8882c
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-26T2121Z-20000-wwv-20000
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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