NIL HEARDRECEPTION LOG

WWVH time signal

tier A · keyed-tone

15000 kHz AM · 2026-09-20 21:47:10Z · 02:31 · received at Waimea, Hawaii

Spectrogram of WWVH time signal, 15000 kHz AM, 2026-09-20 21:47:10Z, 02:31: noise 50% · keyed-tone 38% · carrier 12% · tone 1160 Hz · keying 0.20 Hz depth 0.66
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier noise
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 2.8 MB ⤓ Opus 567 kB { }
What was heard
noise 50% · keyed-tone 38% · carrier 12% · tone 1160 Hz · keying 0.20 Hz depth 0.66 — dominant tone 1160 Hz, keyed at 0.2 Hz (depth 0.66). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Waimea, Hawaii (BL20da) · Tuned fan dipole · reported SNR 20 dB — thanks to the operator. Receivers
Provenance
sha256 8f0c0a145759fb6b42f5208dbc815cee3c45b3841d580be54a91c9210e3d67dd
source 02:31 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T2147Z-15000-wwvh-15000
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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