NIL HEARDRECEPTION LOG

Rostov VOLMET (Russian) night

tier A · mixed

6617 kHz USB · 2026-09-24 00:56:13Z · 04:11 · received at Poland, Warsaw

Spectrogram of Rostov VOLMET (Russian) night, 6617 kHz USB, 2026-09-24 00:56:13Z, 04:11: mixed 77% · carrier 15% · voice 8% · tone 2175 Hz · keying 1.15 Hz depth 0.71
spectrogram 0–6.0 kHz · analysis blocks: voice carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.4 MB ⤓ Opus 1077 kB { }
What was heard
mixed 77% · carrier 15% · voice 8% · tone 2175 Hz · keying 1.15 Hz depth 0.71 — dominant tone 2175 Hz, keyed at 1.15 Hz (depth 0.71). 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 26 dB — thanks to the operator. Receivers
Provenance
sha256 7b55a4a326222df8de31ea2e42978af7865da8d517dd1a83dd7657797111da62
source 04:11 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-24T0056Z-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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