NIL HEARDRECEPTION LOG

NSS US Navy Annapolis, continuous FSK

tier A · mixed

12013.5 kHz USB · 2026-09-26 16:51:41Z · 10:00 · received at Eganville, Canada

Spectrogram of NSS US Navy Annapolis, continuous FSK, 12013.5 kHz USB, 2026-09-26 16:51:41Z, 10:00: mixed 63% · morse 37% · tone 1497 Hz · keying 0.90 Hz depth 0.77
spectrogram 0–6.0 kHz · analysis blocks: morse mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.6 MB ⤓ Opus 2485 kB { }
What was heard
mixed 63% · morse 37% · tone 1497 Hz · keying 0.90 Hz depth 0.77 — dominant tone 1497 Hz, keyed at 0.9 Hz (depth 0.77). 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 b8eea229a1089ac78b553f9d563ec67e7e11edff00683b401fc323651ac6eff5
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-26T1651Z-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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