ON4UW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO20

Receiver-side FT8 activity involving ON4UW, decoded by SO8OO in southeastern Poland. 99 FT8 messages attributed to this token as transmitter, on 80m, 20m, 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-27 and 2026-09-14.

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 99 FT8 messages attributed to ON4UW as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (54%), followed by 20 m (24%) and 10 m (22%). Several six-hour UTC windows tied for the largest share (46%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (66%); the estimated median was -6 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

80m · 53 20m · 24 10m · 22

First attributed message: 2026-08-27
Last attributed message: 2026-09-14 05:29 UTC

Observed FT8 message patterns

Attributed sample: 99 messages
Active dates: 4 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -13 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 29, strong (≥ -8 dB) 65.

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 ON4UW in decoded directed-looking exchanges:

JR2PZX · Japan BG4UVR · China BU2FW · Taiwan EP2AES · Iran OH2GT · Finland SA0CCA · Sweden CT3IQ · Madeira Islands DK7TX · Fed. Rep. of Germany DL9KM · Fed. Rep. of Germany DO9BAU · Fed. Rep. of Germany EA1IOK · Spain EU6MM · Belarus

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 ON4UW

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: JO20 · 55 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,194 km (approx.)
Last such locator decoded: 2026-09-14 05:29 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	ON4UW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 05:30	80m	- / -	DL1UDO	-11 / -	4	Partial capture
09-14 05:30	80m	- / +2	DO1FZL	-12 / -	7	Partial capture
09-14 05:29	80m	- / -2	F1PBZ	-5 / -	5	Partial capture
09-14 05:28	80m	- / -	G8OO	-9 / -	8	Partial capture
09-14 05:27	80m	-10 / -	F6FHZ	- / -10	3	✓ Closing fragment
09-14 05:21	80m	-12 / -	K4YT	- / -	3	Partial capture
08-31 20:12	80m	-7 / +4	DK7TX	-6 / -	3	✓ Closing observed
08-31 20:12	80m	-8 / -6	YO4NT	+2 / -	3	✓ Closing observed
08-31 20:12	80m	- / +9	HB9FUR	-12 / -	2	✓ Closing fragment
08-31 17:45	80m	-12 / -	US7UR	- / -	2	Partial capture
08-31 17:42	80m	-18 / -	UT3UZ	- / -	2	Partial capture
08-31 17:27	80m	-21 / -18	EU6MM	+4 / -	4	✓ Closing observed
08-30 22:30	80m	-4 / -	SQ5IRH	-13 / -18	3	✓ Closing observed
08-30 22:30	80m	-2 / -6	DO9BAU	+3 / +8	7	✓ Full exchange observed
08-30 22:28	80m	-6 / -16	PE1NPS	-19 / +2	7	✓ Full exchange observed
08-30 22:27	80m	-5 / -	OK2ON	-6 / -10	3	✓ Closing observed
08-30 22:27	80m	- / -	DL3HN	-10 / -	2	Partial capture
08-30 22:27	80m	-5 / -	LZ2VQ	-12 / -6	4	Partial capture
08-30 22:26	80m	-4 / -	CT3IQ	- / -10	2	✓ Closing fragment
08-30 22:13	80m	-10 / -	VK6ABC	- / -	2	Partial capture
08-30 22:10	80m	-8 / 0	DL9KM	-6 / -	5	✓ Closing observed
08-30 22:10	80m	-4 / -7	UA4FKT	+10 / +6	4	✓ Full exchange observed
08-30 22:08	80m	-6 / -13	TA7ARH	+10 / -4	7	✓ Full exchange observed
08-30 22:06	80m	-7 / -3	EA1IOK	-6 / +1	5	✓ Full exchange observed
08-30 22:05	80m	-8 / -9	R9OAE	-8 / -15	5	✓ Full exchange observed
08-30 15:21	20m	- / -20	EP2AES	-8 / -	3	✓ Closing fragment
08-30 14:21	20m	+5 / -	EP2AES	- / -	6	Partial capture
08-30 14:13	20m	-6 / -	VU2UUU	- / -10	2	Partial capture
08-30 14:11	20m	- / -	PD3LKN	-6 / -	2	Partial capture
08-30 14:09	20m	0 / -	OH2GT	- / -8	2	✓ Closing fragment
08-30 14:07	20m	- / -	PD3LKN	-6 / -	2	Partial capture
08-30 14:06	20m	- / -	OE5EYM	+20 / -	2	Partial capture
08-30 14:06	20m	+2 / -	BG4UVR	- / -9	2	✓ Closing fragment
08-30 14:02	20m	0 / -	BU2FW	- / -3	7	✓ Closing fragment
08-30 14:01	20m	-7 / -	SA0CCA	- / -	2	✓ Closing fragment
08-27 11:41	10m	-6 / -	JA0GCI	- / -	2	Partial capture
08-27 11:28	10m	-12 / -	ON3CCM	- / -25	2	Partial capture
08-27 11:26	10m	-4 / -	JR2PZX	- / -25	2	✓ Closing fragment
08-27 11:20	10m	-10 / -	JH0INP	- / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
053030  -7  582  ON4UW G8OO JO02
053030  -4  704  ON4UW F1PBZ -02
053030 -10 1809  ON4UW DO1FZL R+02
053030 -10 1330  ON4UW DL1UDO JO31
053100  -8  582  ON4UW G8OO JO02
053100  -5  704  ON4UW F1PBZ -02
053100 -13 1809  ON4UW DO1FZL R+02
053100 -11 1330  ON4UW DL1UDO JO31
053130  -6  582  ON4UW G8OO JO02
053130  -7  704  ON4UW F1PBZ -02
053130 -13 1809  ON4UW DO1FZL R+02
053130  -9 1330  ON4UW DL1UDO JO31
053200 -10 1809  ON4UW DO1FZL R+02 (x3)

20m

UTC    dB Audio  Message
140930  +5 1402  OH2GT ON4UW RR73
141115  -7 1402  ON4UW PD3LKN JO22 (x2)
141315  -3 1402  VU2UUU ON4UW -10 (x2)
142145  -3 2378  EP2AES ON4UW JO20 (x7)
152115  -5 2103  ON4UW EP2AES -20 (x3)

10m

UTC    dB Audio  Message
112415  -2 1314  CQ JA ON4UW JO20 (x2)
112645  -2 1314  JR2PZX ON4UW -25 (x2)
112745  -4 1313  CQ JA ON4UW JO20 (x2)
112845 -11 1313  ON3CCM ON4UW -25 (x2)
112945  -5 1312  CQ JA ON4UW JO20 (x4)
113515  -4 1288  ON3CCM ON4UW -23
114130  -7 1288  JA0GCI ON4UW JO20 (x2)

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.

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