NIL HEARDRECEPTION LOG

DWD Hamburg RTTY weather DDH7

tier A · data

7644.5 kHz USB · 2026-09-21 14:24:52Z · 10:00 · received at Wessex - KiwiSDR - G8JNJ - South West UK

Spectrogram of DWD Hamburg RTTY weather DDH7, 7644.5 kHz USB, 2026-09-21 14:24:52Z, 10:00: data 97% · morse 3% · tone 1274 Hz · keying 6.66 Hz depth 0.94
spectrogram 0–6.0 kHz · analysis blocks: morse data
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.5 MB ⤓ Opus 2562 kB { }
What was heard
data 97% · morse 3% · tone 1274 Hz · keying 6.66 Hz depth 0.94 — dominant tone 1274 Hz, keyed at 6.66 Hz (depth 0.94). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Wessex - KiwiSDR - G8JNJ - South West UK (IO80qr) · (same as Wessex KiWi V1) · reported SNR 31 dB — thanks to the operator. Receivers
Provenance
sha256 886649780c5ba74b29029e240b6071be08ee07221162f4c54c2731b1feecdcb0
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T1424Z-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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