NIL HEARDRECEPTION LOG

NSS US Navy Annapolis, continuous FSK

tier A · morse

12013.5 kHz USB · 2026-09-20 14:18:54Z · 10:00 · received at Eganville, Canada

Spectrogram of NSS US Navy Annapolis, continuous FSK, 12013.5 kHz USB, 2026-09-20 14:18:54Z, 10:00: morse 97% · carrier 3% · tone 1854 Hz · keying 1.15 Hz depth 0.80
spectrogram 0–6.0 kHz · analysis blocks: morse carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.7 MB ⤓ Opus 2441 kB { }
What was heard
morse 97% · carrier 3% · tone 1854 Hz · keying 1.15 Hz depth 0.80 — dominant tone 1854 Hz, keyed at 1.15 Hz (depth 0.8). 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 31 dB — thanks to the operator. Receivers
Provenance
sha256 575d71b6653c55046a9ed9e1ec1bfa42608006cc944848bed1c3dd9a2acfe6a0
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T1418Z-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.
Related