NIL HEARDRECEPTION LOG

WWV time signal

tier A · keyed-tone

5000 kHz AM · 2026-09-25 07:49:57Z · 04:18 · received at Presque Isle, WI USA

Spectrogram of WWV time signal, 5000 kHz AM, 2026-09-25 07:49:57Z, 04:18: keyed-tone 62% · carrier 23% · data 15% · tone 100 Hz · keying 1.00 Hz depth 0.98
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone data carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.9 MB ⤓ Opus 1078 kB { }
What was heard
keyed-tone 62% · carrier 23% · data 15% · tone 100 Hz · keying 1.00 Hz depth 0.98 — dominant tone 100 Hz, keyed at 1.0 Hz (depth 0.98). 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 30 dB — thanks to the operator. Receivers
Provenance
sha256 9c7e7d7176ba84eebfe794c419629963766febd5bb763c71cf0c158196228a0d
source 04:18 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-25T0749Z-5000-wwv-5000
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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