NIL HEARDRECEPTION LOG

MSF Anthorn 60 kHz time code

tier A · keyed-tone

59 kHz USB · 2026-09-23 15:41:46Z · 02:27 · received at Heppen, Limburg, Belgium

Spectrogram of MSF Anthorn 60 kHz time code, 59 kHz USB, 2026-09-23 15:41:46Z, 02:27: keyed-tone 100% · tone 999 Hz · keying 1.00 Hz depth 0.85
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 2.3 MB ⤓ Opus 623 kB { }
What was heard
keyed-tone 100% · tone 999 Hz · keying 1.00 Hz depth 0.85 — dominant tone 999 Hz, keyed at 1.0 Hz (depth 0.85). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Heppen, Limburg, Belgium (JO21oc) · Longwire 54m top 70m above sealevel · reported SNR 34 dB — thanks to the operator. Receivers
Provenance
sha256 34774be4a8d8a04314f00177e155487d7b54dacaa711170142b1ef78074aa1cd
source 02:27 WAV, 12000 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T1541Z-59-msf-60
Heard in the record
Reception Conditions Were Poor — “Dead Air Bureau”
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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