SM4ONW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JP70

Receiver-side FT8 activity involving SM4ONW, decoded by SO8OO in southeastern Poland. 188 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 18 UTC dates in the available aggregate history. Observed between 2026-07-09 and 2026-09-21.

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 188 FT8 messages attributed to SM4ONW as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (71%), followed by 60 m (26%) and 80 m (2%). Most decodes (92%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

188

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 4 60m · 49 40m · 133 20m · 2

First attributed message: 2026-07-09
Last attributed message: 2026-09-21 15:14 UTC

Observed FT8 message patterns

Attributed sample: 188 messages
Active dates: 18 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 51, moderate (-15 to -9 dB) 74, strong (≥ -8 dB) 63.

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 SM4ONW in decoded directed-looking exchanges:

IZ8EOB · Italy ×2 EA8AT · Canary Islands F4HSB · France S56KO · Slovenia 8Q7PR · Maldives BA4II · China BD7OH · China BG0HP · China CR7BXA · Portugal DH4RK · Fed. Rep. of Germany DK3TNA · Fed. Rep. of Germany DL4DP · Fed. Rep. of Germany

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 SM4ONW

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: JP70 · 36 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,249 km (approx.)
Last such locator decoded: 2026-09-21 15:14 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	SM4ONW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 15:14	60m	-17 / -	II8IHBC	- / -	2	Partial capture
09-19 17:57	80m	-6 / -	RI1FJZ	- / -25	2	Partial capture
09-19 17:19	60m	-2 / -8	IZ8EOB	-4 / +2	5	✓ Full exchange observed
09-19 17:18	60m	0 / -3	HF5A	+5 / -	6	✓ Full exchange observed
09-19 17:18	60m	-5 / -15	SV1DZB	-1 / +2	5	✓ Full exchange observed
09-19 17:14	60m	-5 / -	G7RVH	- / -1	2	✓ Closing fragment
09-19 17:13	60m	-2 / -	DL2AOM	-20 / -2	4	✓ Closing observed
09-19 17:13	60m	-2 / -4	F1DZP	-10 / -	6	✓ Closing observed
09-19 17:11	60m	-6 / -	SP2BDR	+6 / -	3	✓ Closing observed
09-19 17:08	60m	- / -	SP2BDR	0 / -	2	Partial capture
09-19 17:06	60m	-3 / -12	IZ2ACM	-13 / -10	5	✓ Full exchange observed
09-19 17:05	60m	0 / -15	SP9DPI	-14 / -9	4	✓ Full exchange observed
09-19 17:04	60m	-2 / -	5Q1X	- / +1	2	✓ Closing fragment
09-19 17:01	60m	-9 / -	IU2UFG	- / -18	4	Partial capture
08-27 19:17	60m	-2 / -	F6FEG	- / +1	2	✓ Closing fragment
08-27 19:14	60m	-3 / -1	ER1CW	-13 / -4	6	✓ Full exchange observed
08-20 06:13	40m	- / -7	PD0WL	-5 / -	3	✓ Closing fragment
08-20 06:12	40m	- / -17	PD1AC	-15 / -	3	Partial capture
08-20 06:07	40m	-4 / -	OJ0JR	- / -15	6	Partial capture
08-16 17:05	40m	-24 / -2	SN1A	-21 / -	2	✓ Closing observed
08-16 17:04	40m	-24 / -3	SQ2BXI	-2 / +6	7	✓ Full exchange observed
08-09 18:51	60m	-9 / -6	4X5MZ	-3 / +5	4	✓ Full exchange observed
08-06 20:23	60m	-3 / -	DL8UD	0 / -	3	✓ Closing observed
08-06 20:22	60m	-4 / +3	DL1NEO	-11 / 0	4	✓ Full exchange observed
08-06 20:20	60m	-7 / +8	PA7JWC/P	-9 / +7	4	✓ Full exchange observed
08-06 20:02	20m	- / -4	EA8AT	-7 / -	2	✓ Closing fragment
08-05 17:00	40m	-14 / -	M0VTS	- / -12	2	✓ Closing fragment
08-05 16:59	40m	-17 / -	R3EDI	-14 / +9	3	✓ Closing observed
08-03 18:38	40m	- / +4	RN6MA	-13 / -	2	Partial capture
08-03 18:34	40m	- / -16	DL3MIB	-4 / -	2	Partial capture
08-03 18:30	40m	-20 / -	PA7D	-20 / -13	2	Partial capture
08-03 05:04	60m	-17 / -	DK2YCT	- / +8	2	✓ Closing fragment
08-03 05:02	60m	-16 / -	<...>	- / -3	2	Partial capture
08-03 05:00	60m	- / -11	DK5WL	-14 / -	2	✓ Closing fragment
07-26 19:11	40m	-14 / -	DL9SAD	-4 / +7	5	✓ Full exchange observed
07-26 19:10	40m	-9 / -	GJ0KYZ	-19 / 0	4	✓ Closing observed
07-26 19:09	40m	-14 / -6	RY7G	-1 / -1	5	✓ Full exchange observed
07-26 19:07	40m	-16 / -	PD1ADA	- / -4	2	✓ Closing fragment
07-26 19:05	40m	-16 / -4	F1PBZ	-6 / +6	4	✓ Full exchange observed
07-26 19:03	40m	-14 / +7	HA7FT	-8 / +7	5	✓ Full exchange observed
07-26 19:03	40m	-14 / -	SM2SCK	- / -2	2	✓ Closing fragment
07-25 16:59	40m	- / -5	IN3XUG	-17 / -	4	✓ Closing fragment
07-23 19:19	40m	-12 / -4	SP1ADT	-12 / -	5	✓ Full exchange observed
07-23 19:17	40m	-14 / -5	F5NNN	-14 / -6	4	✓ Full exchange observed
07-23 19:15	40m	- / -1	R3LC	-6 / -	2	✓ Closing fragment
07-20 19:58	40m	-10 / -	HB9DKG	+6 / +6	6	✓ Full exchange observed
07-20 19:56	40m	-8 / -	PE1LDS	- / -1	2	✓ Closing fragment
07-20 19:55	40m	-10 / -	DL4DP	- / -10	3	✓ Closing fragment
07-20 19:52	40m	-10 / -	DK3TNA	- / 0	2	✓ Closing fragment
07-20 19:51	40m	-7 / -	BD7OH	- / -15	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
171830  -1  907  SM4ONW SV1DZB R-15
171845  -7 1583  SV1DZB SM4ONW RR73
171900  -2  907  SM4ONW SV1DZB 73
171900  -4 1232  SM4ONW IZ8EOB JM78
171915  +0 1584  IZ8EOB SM4ONW +02
171930  -2 1232  SM4ONW IZ8EOB R-08
171945  -4 1584  IZ8EOB SM4ONW RR73
172000  -5 1233  SM4ONW IZ8EOB 73
172000  +6 2293  SM4ONW HF5A JO92
172015  -2 1584  HF5A SM4ONW +13
172030  +0 2293  SM4ONW HF5A R-03
172045  +1 1584  HF5A SM4ONW RR73
172100  +9 2293  SM4ONW HF5A 73
151415 -18 1585  II8IHBC SM4ONW JP70 (x2)

80m

UTC    dB Audio  Message
201115 -15 1304  ZS6WAB SM4ONW JP70 (x2)
175745  -5 1564  RI1FJZ SM4ONW -25 (x2)

40m

UTC    dB Audio  Message
060415 -15 1860  OJ0JR SM4ONW -15 (x7)
061130 -16 1095  SM4ONW RK3AW -04
061200 -14 2235  SM4ONW PD1AC JO22
061215  -6 1860  EA5HM SM4ONW -03
061230 -15 2235  SM4ONW PD1AC JO22 (x2)
061330  -5 2840  SM4ONW PD0WL JO21 (x3)

20m

UTC    dB Audio  Message
135800 -16 1378  S56KO SM4ONW RR73
140045 -22 1657  SM4ONW F4HSB R-01
140100 -17 1378  F4HSB SM4ONW RR73
200215  -6  505  SM4ONW EA8AT R-04 (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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