NIL HEARDRECEPTION LOG

NSS US Navy Annapolis, continuous FSK

tier A · morse

12013.5 kHz USB · 2026-10-04 17:00:24Z · 03:57 · received at Eganville, Canada

Spectrogram of NSS US Navy Annapolis, continuous FSK, 12013.5 kHz USB, 2026-10-04 17:00:24Z, 03:57: morse 100% · tone 1497 Hz · keying 1.70 Hz depth 0.76
spectrogram 0–6.0 kHz · analysis blocks: morse
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 4.2 MB ⤓ Opus 967 kB { }
What was heard
morse 100% · tone 1497 Hz · keying 1.70 Hz depth 0.76 — dominant tone 1497 Hz, keyed at 1.7 Hz (depth 0.76). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Eganville, Canada (FN15jl) · CHA EMCOMM III Base Antenna · reported SNR 30 dB — thanks to the operator. Receivers
Provenance
sha256 43ca6532b9de8accd44537c5e00cc0ac6971c61ea2fb118d24715ee4e2c8251f
source 03:57 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-04T1700Z-12013.5-fsk-nss-12015
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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