NIL HEARDRECEPTION LOG

WWVH time signal

tier A · keyed-tone

15000 kHz AM · 2026-09-24 02:45:21Z · 05:00 · received at Waimea, Hawaii

Spectrogram of WWVH time signal, 15000 kHz AM, 2026-09-24 02:45:21Z, 05:00: keyed-tone 80% · carrier 20% · tone 100 Hz · keying 1.00 Hz depth 0.91
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.3 MB ⤓ Opus 1242 kB { }
What was heard
keyed-tone 80% · carrier 20% · tone 100 Hz · keying 1.00 Hz depth 0.91 — dominant tone 100 Hz, keyed at 1.0 Hz (depth 0.91). 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 19 dB — thanks to the operator. Receivers
Provenance
sha256 cc828fad7bb10ba02a0cdd0668135864c6f796992fef251c1d516fd13bec12de
source 05:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-24T0245Z-15000-wwvh-15000
Heard in the record
Reception Conditions Were Poor — “Silent Key”
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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