NIL HEARDRECEPTION LOG

Rostov VOLMET (Russian) night

tier A · mixed

6617 kHz USB · 2026-09-24 20:56:04Z · 04:17 · received at Poland, Warsaw

Spectrogram of Rostov VOLMET (Russian) night, 6617 kHz USB, 2026-09-24 20:56:04Z, 04:17: mixed 62% · voice 23% · keyed-tone 15% · tone 494 Hz · keying 0.85 Hz depth 0.80
spectrogram 0–6.0 kHz · analysis blocks: voice keyed-tone mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.5 MB ⤓ Opus 1086 kB { }
What was heard
mixed 62% · voice 23% · keyed-tone 15% · tone 494 Hz · keying 0.85 Hz depth 0.80 — dominant tone 494 Hz, keyed at 0.85 Hz (depth 0.8). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Poland, Warsaw · Test · reported SNR 31 dB — thanks to the operator. Receivers
Provenance
sha256 5131aaddf07e04de8fa7d3d3e00b9877f0851465a962066506dafb7fd0b60189
source 04:17 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-24T2056Z-6617-volmet-6617-rostov
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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