NIL HEARDRECEPTION LOG

DWD Hamburg RTTY weather DDH7

tier A · data

7644.5 kHz USB · 2026-09-23 12:41:41Z · 10:00 · received at Ireland

Spectrogram of DWD Hamburg RTTY weather DDH7, 7644.5 kHz USB, 2026-09-23 12:41:41Z, 10:00: data 97% · morse 3% · tone 1274 Hz · keying 13.31 Hz depth 0.91
spectrogram 0–6.0 kHz · analysis blocks: morse data
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.5 MB ⤓ Opus 2605 kB { }
What was heard
data 97% · morse 3% · tone 1274 Hz · keying 13.31 Hz depth 0.91 — dominant tone 1274 Hz, keyed at 13.31 Hz (depth 0.91). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Ireland (IO53mw) · Dipole · reported SNR 29 dB — thanks to the operator. Receivers
Provenance
sha256 d57ca9d7fae793fd7255345e99e3559aaee44794aa5939eb92c824bd8d734e14
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-23T1241Z-7644.5-rtty-7646
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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