NIL HEARDRECEPTION LOG

WWV time signal

tier A · keyed-tone

10000 kHz AM · 2026-09-18 21:09:14Z · 04:00 · received at Traverse City, MI

Spectrogram of WWV time signal, 10000 kHz AM, 2026-09-18 21:09:14Z, 04:00: keyed-tone 100% · tone 551 Hz · keying 0.45 Hz depth 0.92
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.2 MB ⤓ Opus 926 kB { }
What was heard
keyed-tone 100% · tone 551 Hz · keying 0.45 Hz depth 0.92 — dominant tone 551 Hz, keyed at 0.45 Hz (depth 0.92). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Traverse City, MI (EN74) · DAMAGED IN WIND! ZS6BKW Inverted V - 45' AGL Apex - AM broadcast notch (ANT-> IC-7300 -> PTRX -> Kiwi) · reported SNR 22 dB — thanks to the operator. Receivers
Provenance
sha256 736d480c57f3250d7d20c83e0fab3b61b0aa3d5c4d3c4babb4959f0a6dc65819
source 04:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-18T2109Z-10000-wwv-10000
Heard in the record
— linked once the record exists.
Notes

rig: WWV Fort Collins, continuous; male voice UTC announcement at :52.5 each minute, ticks, 500/600 Hz tones; minutes 14-15 carry the USCG GPS status voice announcement. Retry with eastern-NA receivers after all Colorado-area candidates refused. Source: nist.gov WWV/WWVH broadcast format

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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