NIL HEARDRECEPTION LOG

Empty band / atmospherics

tier A · carrier

6200 kHz AM · 2026-09-22 01:28:20Z · 10:00 · received at Brettnach F57320

Spectrogram of Empty band / atmospherics, 6200 kHz AM, 2026-09-22 01:28:20Z, 10:00: carrier 87% · keyed-tone 13% · tone 26 Hz · keying 0.28 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 10.6 MB ⤓ Opus 2358 kB { }
What was heard
carrier 87% · keyed-tone 13% · tone 26 Hz · keying 0.28 Hz depth 0.91 — dominant tone 26 Hz, keyed at 0.28 Hz (depth 0.91). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Brettnach F57320 (JN39GG) · vertical · reported SNR 42 dB — thanks to the operator. Receivers
Provenance
sha256 d8e5451fe0621e9bc6ac7091169dff39ff8299d8ec1cfeb3799db4fe48942061
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-22T0128Z-6200-quiet-6200
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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