SM5URS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO78

Receiver-side FT8 activity involving SM5URS, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-07 and 2026-07-24.

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 11 FT8 messages attributed to SM5URS as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (64%), followed by 80 m (18%) and 40 m (18%). In this small sample, the estimated median decoder S/N was -15 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 2 40m · 2 20m · 7

First attributed message: 2026-07-07
Last attributed message: 2026-07-24 20:10 UTC

Observed FT8 message patterns

Attributed sample: 11 messages
Active dates: 3 UTC dates
Estimated median S/N: -15 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 2.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with SM5URS in decoded directed-looking exchanges:

9A4ZM · Croatia 9A6T · Croatia DK7UY · Fed. Rep. of Germany DL2026W · Fed. Rep. of Germany DN9MJK · Fed. Rep. of Germany DO1SWC · Fed. Rep. of Germany IZ2EID · Italy OZ1GHK · Denmark SV1CQN · Greece UR4QWW · Ukraine DL7GW · Fed. Rep. of Germany JA1PSS · Japan

Most frequent locator attributed to SM5URS

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: JO78 · 5 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,048 km (approx.)
Last such locator decoded: 2026-07-24 20:10 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	SM5URS S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-27 12:53	20m	- / -16	MI0JZZ	-7 / -	2	✓ Closing fragment
07-25 12:51	10m	- / +2	DK7UY	-11 / -	3	✓ Closing fragment
07-25 12:50	20m	- / -1	F1PSX	-1 / -	9	Partial capture
07-25 12:32	10m	- / -3	PD0HLA	-9 / -	3	Partial capture
07-25 12:27	10m	- / -	DL2026W	-10 / -	2	✓ Closing fragment
07-25 12:27	10m	- / -5	PD0HLA	-6 / -	3	Partial capture
07-24 20:48	20m	- / -	JA4MMO	-17 / -	3	Partial capture
07-24 20:10	80m	-2 / -	TA3GO	- / -	2	Partial capture
07-24 19:05	20m	- / -	R2EC	-1 / -	2	Partial capture
07-24 19:03	20m	-15 / -4	SP7DSO	-4 / -	6	✓ Closing observed
07-24 18:58	20m	- / -10	JA1PSS	-19 / -	4	✓ Closing fragment
07-23 09:26	10m	- / -	LZ3CB	+2 / -	3	Partial capture
07-23 09:22	10m	- / -5	9A6T	-2 / -	3	✓ Closing fragment
07-12 09:57	40m	- / +1	SP2L	-14 / -	5	✓ Closing fragment
07-12 09:51	40m	- / +7	SP2L	-13 / -	4	Partial capture
07-11 19:01	40m	-14 / -	<...>	- / -14	2	Partial capture
07-10 20:38	10m	- / 0	DO1SWC	-20 / -	3	✓ Closing fragment
07-10 20:07	10m	- / -	DF1IH	-18 / -	2	Partial capture
07-08 10:40	10m	- / -14	9A4ZM	-14 / -	2	✓ Closing fragment
07-08 10:38	10m	- / -15	UR4QWW	0 / -	3	✓ Closing fragment
07-08 10:28	10m	- / -3	IZ2EID	-24 / -	3	✓ Closing fragment
07-07 16:23	20m	- / -	DJ1BJB	-5 / -	3	Partial capture
07-07 16:16	20m	-12 / -	F8AEJ	-17 / -16	2	Partial capture
07-07 16:12	20m	-16 / -	OE8DDX	- / -7	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
204915 -19 1653  SM5URS JA4MMO PM54 (x2)
125045  -3  845  SM5URS F1PSX R-01 (x9)
074915  -7 1139  SM5URS LZ1ZF -25
075215 -16 2434  SM5URS UA3LRN KO64
125345  -8  678  SM5URS MI0JZZ -16 (x2)

10m

UTC    dB Audio  Message
092630  +1 2241  SM5URS LZ3CB KN32 (x3)
122715  -7 2660  SM5URS PD0HLA -05 (x2)
122745  -6  674  <SM5URS> DL2026W
122815  -3 2660  SM5URS PD0HLA -05
122845 -13  673  SM5URS DL2026W 73
123215  -8 2660  SM5URS PD0HLA -03 (x3)
124445 -18 1978  SM5URS OZ5NJ R-15
125145 -13  857  SM5URS DK7UY JO44 (x3)

80m

UTC    dB Audio  Message
201000  -2  605  TA3GO SM5URS JO78 (x2)

40m

UTC    dB Audio  Message
190115 -14  923  <...> SM5URS JO78 (x2)
095130 -14 2130  SM5URS SP2L +07 (x9)

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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