NIL HEARDRECEPTION LOG

WWV time signal

tier A · keyed-tone

10000 kHz AM · 2026-10-03 09:17:19Z · 10:00 · received at Presque Isle, WI USA

Spectrogram of WWV time signal, 10000 kHz AM, 2026-10-03 09:17:19Z, 10:00: keyed-tone 87% · carrier 7% · morse 7% · tone 501 Hz · keying 0.43 Hz depth 0.89
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 9.6 MB ⤓ Opus 2389 kB { }
What was heard
keyed-tone 87% · carrier 7% · morse 7% · tone 501 Hz · keying 0.43 Hz depth 0.89 — dominant tone 501 Hz, keyed at 0.43 Hz (depth 0.89). 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 d4808e4c297ffda26ccb33c07d813febe4958273e92584660b06016e2a252bd7
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-03T0917Z-10000-wwv-10000-na
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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