DF4IAO — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN48

Receiver-side FT8 activity involving DF4IAO, decoded by SO8OO in southeastern Poland. 166 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-05 and 2026-08-12.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 166 FT8 messages attributed to DF4IAO as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (81%), followed by 20 m (17%) and 40 m (2%). Several six-hour UTC windows tied for the largest share (87%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

166

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

40m · 3 20m · 28 10m · 135

First attributed message: 2026-08-05
Last attributed message: 2026-08-12 23:10 UTC

Observed FT8 message patterns

Attributed sample: 166 messages
Active dates: 5 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -21 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 60, moderate (-15 to -9 dB) 49, strong (≥ -8 dB) 57.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with DF4IAO in decoded directed-looking exchanges:

CT3MD · Madeira Islands ×2 EA7TB · Spain F4NLW/P · France G0AZH · England G4DBW · England HC1DAZ · Ecuador HI6M · Dominican Republic HJ4FLO · Colombia IQ4JO · Italy IT9ECY · Sicily LY1NM · Lithuania R2FAQ · Kaliningrad

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to DF4IAO

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator: JN48 · 55 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 941 km (approx.)
Last such locator decoded: 2026-08-12 23:10 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTC	Band	DF4IAO S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-12 19:57	10m	-4 / -11	G4DBW	-20 / -23	5	✓ Full exchange observed
08-12 19:56	10m	-2 / -	SP6FME	- / -8	2	✓ Closing fragment
08-12 19:53	10m	-15 / -	R2FAQ	- / -	3	✓ Closing fragment
08-12 19:51	10m	-8 / -	SH0JPO	- / -13	3	✓ Closing fragment
08-12 19:29	10m	-1 / -17	CT3MD	-10 / -23	45	✓ Full exchange observed
08-12 19:26	10m	-2 / -	EA7TB	- / -22	6	✓ Closing fragment
08-12 19:24	10m	-10 / -	G0AZH	- / +7	2	✓ Closing fragment
08-12 19:24	10m	- / -	IK4LZH	-1 / -	4	Partial capture
08-12 19:22	10m	-17 / -11	F1PBZ	+10 / -11	2	Partial capture
08-11 21:39	10m	-21 / -	9A60CBM	- / +10	2	Partial capture
08-11 21:30	10m	-9 / -	F4NLW/P	- / -16	3	Partial capture
08-11 21:17	10m	-14 / -	UX7QV	- / +5	2	✓ Closing fragment
08-11 21:15	10m	-14 / -	YY5MFR	- / -17	3	✓ Closing fragment
08-11 21:12	10m	-14 / -	HJ4FLO	- / -5	2	✓ Closing fragment
08-11 21:10	10m	- / -24	F1PBZ	+4 / -	4	Partial capture
08-11 21:08	10m	-16 / -	HI6M	- / -17	2	✓ Closing fragment
08-11 20:49	10m	-19 / -	XQ3SK	- / -24	5	✓ Closing fragment
08-11 20:45	10m	-22 / -	F4NLW/P	- / -1	2	✓ Closing fragment
08-11 20:38	10m	-16 / -4	IT9ECY	-23 / +4	3	✓ Full exchange observed
08-11 20:31	10m	-17 / -	UX7QV	- / -6	10	Partial capture
08-11 07:06	10m	-13 / -	EW6PG	- / -	6	Partial capture
08-11 07:02	10m	-13 / -	IQ4JO	- / -20	2	✓ Closing fragment
08-11 07:00	10m	- / -12	F1PBZ	-1 / -	3	Partial capture
08-11 05:46	10m	- / 0	SV2CLJ	-4 / -	2	✓ Closing fragment
08-07 07:09	20m	- / -	G4DBW	-4 / -	2	Partial capture
08-07 07:02	20m	- / -	F5HNQ	+1 / -	2	Partial capture
08-06 07:51	20m	- / -19	UA4FKT	-13 / -	2	✓ Closing fragment
08-06 07:41	20m	-22 / -	<...>	- / -21	3	Partial capture
08-06 07:33	20m	-20 / -	<...>	- / -21	8	Partial capture
08-05 21:35	40m	-17 / -14	DK0KG	-12 / -9	8	Partial capture
08-05 21:03	20m	-10 / -	WA2HIP	- / -11	9	Partial capture
08-05 20:57	20m	-11 / -	9A4ZM	-6 / -3	2	Partial capture
08-05 20:56	20m	-11 / -	OH1LA	- / +5	2	✓ Closing fragment
08-05 19:51	40m	- / -16	US2YW	-18 / -	2	✓ Closing fragment
08-05 19:47	40m	- / -9	F5RRS	-15 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

10m

UTC    dB Audio  Message
195430 -14 1595  CQ DF4IAO JN48                        a1 (x4)
195630  -3 1595  SP6FME DF4IAO -08 (x2)
195730  -2 1595  CQ DF4IAO JN48
195745 -20 2200  DF4IAO G4DBW JO01
195800  -5 1595  G4DBW DF4IAO -23
195815 -19 2200  DF4IAO G4DBW R-11
195830  -2 1595  G4DBW DF4IAO RR73
195845 -20 2200  DF4IAO G4DBW 73
195900  -5 1595  CQ DF4IAO JN48 (x2)
231015 -19 1597  EI2JHB DF4IAO JN48

20m

UTC    dB Audio  Message
074215 -23 1627  <...> DF4IAO -21 (x2)
075100 -12 1628  DF4IAO UA4FKT R-19 (x2)
070130 -19 1906  DF4IAO CN8NS -13
070200 -19 1906  DF4IAO RR73; DJ0MDC <...> -10
070230 -24 1630  DF4IAO PD3LKN JO22
070230  +1 2403  DF4IAO F5HNQ IN98 (x2)
070800 -17 1629  DF4IAO LZ2VQ -01
070900  -4 2317  DF4IAO G4DBW JO01 (x2)
071130 -13  691  DF4IAO R2EA -13
072530 -17 1671  DF4IAO G5MJF -12
073245 -20 1629  P40AA DF4IAO JN48

40m

UTC    dB Audio  Message
194815 -15 1947  DF4IAO F5RRS JN36 (x2)
194915 -10  596  DF4IAO DK8HC JO42
195145 -20 1438  DF4IAO US2YW R-16 (x2)
213200 -21 1478  DF4IAO DK7UY JO44
213345 -19 1478  CQ DF4IAO JN48
213530 -12 1198  DF4IAO DK0KG JN49
213545 -14 1477  DK0KG DF4IAO -09
213600 -12 1198  DF4IAO DK0KG JN49
213615 -20 1477  DK0KG DF4IAO -09
213630 -12 1198  DF4IAO DK0KG R-14 (x4)

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee