S51WX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Slovenia Most frequent locator attributed to this token: JN75

Receiver-side FT8 activity involving S51WX, decoded by SO8OO in southeastern Poland. 121 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-08-29 and 2026-09-16.

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 121 FT8 messages attributed to S51WX as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (69%), followed by 40 m (31%). Several six-hour UTC windows tied for the largest share (94%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.

Overview

121

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

80m · 83 40m · 38

First attributed message: 2026-08-29
Last attributed message: 2026-09-16 21:47 UTC

Observed FT8 message patterns

Attributed sample: 121 messages
Active dates: 7 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -17 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 35, strong (≥ -8 dB) 67.

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 S51WX in decoded directed-looking exchanges:

UR9QQ · Ukraine DF7NO · Fed. Rep. of Germany DJ0MAB · Fed. Rep. of Germany F5SJC · France G8OO · England IZ8PPI · Italy R5AV · European Russia SP7DE · Poland DO5UH/P · Fed. Rep. of Germany MI0OBC · Northern Ireland OE3JPC · Austria R3PJV · European Russia

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 S51WX

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: JN75 · 73 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 708 km (approx.)
Last such locator decoded: 2026-09-16 21:47 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	S51WX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 21:44	40m	-11 / -	UN7PPV	- / -7	3	Partial capture
09-16 21:40	40m	-6 / -	VJ6X	- / -18	5	Partial capture
09-16 21:25	40m	- / -	DF3QL	-7 / -	2	Partial capture
09-15 21:08	40m	- / -8	G8OO	-10 / -	4	✓ Closing fragment
09-15 21:06	40m	- / -12	UA4FKT	+1 / -	3	Partial capture
09-15 21:03	40m	- / -13	RA9ACA	-18 / -	2	Partial capture
09-15 21:02	40m	- / -9	ON7DE	-6 / -	5	Partial capture
09-15 21:01	40m	- / -12	R5AV	+8 / -	4	✓ Closing fragment
09-15 21:00	40m	- / -1	F5SJC	-20 / -	2	✓ Closing fragment
09-14 20:23	40m	-14 / -	SP6EFY	-4 / -	3	Partial capture
09-14 20:20	40m	-12 / -	SP9JP	- / -3	2	Partial capture
09-14 20:19	40m	-10 / -	IZ8PPI	- / +1	2	✓ Closing fragment
09-09 19:13	40m	- / -4	DJ0MAB	0 / -	4	✓ Closing fragment
09-09 19:11	40m	- / -	DF7NO	-1 / -	2	✓ Closing fragment
09-09 19:10	40m	- / -	DJ0MAB	+2 / -	2	Partial capture
09-09 19:10	40m	- / -	DL1UDO	-6 / -	3	Partial capture
09-03 23:42	80m	+4 / +1	UR1CCT	+19 / -	5	✓ Full exchange observed
09-03 23:41	80m	-1 / -12	R3PJV	-4 / +2	5	✓ Full exchange observed
09-03 23:10	80m	+1 / -	9V1YC	- / -10	2	Partial capture
09-03 23:00	80m	+5 / -	ST0P	- / -	3	Partial capture
09-03 22:57	80m	-2 / -	UR3QCB	-1 / -10	8	Partial capture
09-03 22:51	80m	+1 / -	9V1YC	- / -	3	Partial capture
09-03 22:47	80m	-1 / -	RI1FJL	- / +10	6	✓ Closing fragment
09-02 23:24	80m	-8 / -5	DO5UH/P	+4 / +4	6	✓ Full exchange observed
09-02 13:58	40m	-19 / -5	SP7DE	-10 / -4	5	✓ Full exchange observed
08-30 20:55	80m	- / -	DL1UDO	0 / -	2	Partial capture
08-30 20:52	80m	-8 / -9	F1PBZ	+11 / +1	4	Partial capture
08-30 20:35	80m	-6 / -12	MI0OBC	-16 / -12	4	✓ Full exchange observed
08-29 20:30	80m	-8 / -7	OE3JPC	+4 / -1	5	✓ Full exchange observed
07-12 19:28	10m	- / -6	UR9QQ	-2 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
212545 -15 2243  CQ S51WX JN75 (x2)
214030  -7 2030  VJ6X S51WX -18 (x5)
214300  -8 2333  CQ S51WX JN75                         a1 (x2)
214400 -13 2333  UN7PPV S51WX R-07 (x3)
214600  -9 2019  CQ S51WX JN75 (x3)

80m

UTC    dB Audio  Message
234100  -2 2223  S51WX R3PJV KO94
234115  -2 1568  R3PJV S51WX +02
234130  -1 2223  S51WX R3PJV R-12
234145  +0 1568  R3PJV S51WX RR73
234200 +20  695  S51WX UR1CCT KN69
234200  -8 2223  S51WX R3PJV 73
234215  +6 1568  UR1CCT S51WX +33
234230 +18  695  S51WX UR1CCT R+01
234245  +1 1568  UR1CCT S51WX RR73
234300 +19  695  S51WX UR1CCT 73
234315  +5 1568  CQ DX S51WX (x5)

10m

UTC    dB Audio  Message
192800  +0 1086  S51WX UR9QQ KN77 (x3)

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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