GM4SUF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Scotland Most frequent locator attributed to this token: IO77

Receiver-side FT8 activity involving GM4SUF, decoded by SO8OO in southeastern Poland. 56 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-08-03.

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 56 FT8 messages attributed to GM4SUF as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (91%), followed by 10 m (9%). Most decodes (98%) fell within the six-hour window 11:00-17:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (63%); the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

20m · 51 10m · 5

First attributed message: 2026-06-11
Last attributed message: 2026-08-03 13:53 UTC

Observed FT8 message patterns

Attributed sample: 56 messages
Active dates: 8 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -23 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 35, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 8.

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 GM4SUF in decoded directed-looking exchanges:

EA3EDU · Spain IK2VFR/P · Italy BG7BMG · China DB1EF · Fed. Rep. of Germany DF5DY · Fed. Rep. of Germany DH5NC · Fed. Rep. of Germany DJ9HX · Fed. Rep. of Germany DL1R · Fed. Rep. of Germany DL7DO · Fed. Rep. of Germany EA4GG · Spain F4GPB · France F5IXN · France

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 GM4SUF

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: IO77 · 29 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,936 km (approx.)
Last such locator decoded: 2026-08-03 13:51 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	GM4SUF S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 15:10	10m	- / -21	EA3EDU	-2 / -	7	✓ Closing fragment
08-03 13:58	20m	- / -10	UT5MD	-2 / -	2	✓ Closing fragment
08-03 13:53	20m	-22 / -18	DH5NC	-12 / -21	4	✓ Full exchange observed
08-03 13:50	20m	-21 / -	S21AF	- / -	2	Partial capture
07-28 12:54	20m	- / -	F4GPB	-6 / -	2	✓ Closing fragment
07-28 12:51	20m	-14 / -	PD1ADA	-19 / -	3	✓ Closing observed
07-26 11:57	20m	-23 / -	EA4GG	-13 / +4	3	✓ Closing observed
07-21 16:07	20m	-10 / -	S21ALT	- / -	2	Partial capture
07-21 16:04	20m	-6 / -	S21ALT	- / -	2	Partial capture
07-21 16:03	20m	-10 / -	UB4CLL	- / -13	2	✓ Closing fragment
07-21 16:02	20m	-13 / -	BG7BMG	- / -11	2	✓ Closing fragment
07-19 15:32	10m	- / -13	R7OV	-18 / -	3	Partial capture
07-11 11:52	20m	- / -	PD1ADA	-23 / -	2	Partial capture
06-25 12:31	20m	- / -10	DL1R	-14 / -	2	✓ Closing fragment
06-25 12:28	20m	- / 0	YO6PPX	-6 / -	3	✓ Closing fragment
06-25 12:26	20m	-17 / -	HI3A	- / -7	3	Partial capture
06-25 12:24	20m	- / -	DL7DO	-14 / -	2	✓ Closing fragment
06-25 12:19	20m	- / -	YT1VDA	-20 / -	2	✓ Closing fragment
06-25 12:18	20m	- / -	PD1WMD	-20 / -	2	✓ Closing fragment
06-23 15:08	20m	-19 / -	OK5LR	- / -7	2	✓ Closing fragment
06-23 15:06	20m	-16 / -	DJ9HX	- / -	2	✓ Closing fragment
06-23 15:03	20m	-10 / -9	M8MWX	-17 / -9	5	✓ Full exchange observed
06-23 15:02	20m	-6 / -9	F5IXN	-7 / -17	5	✓ Full exchange observed
06-23 15:01	20m	-14 / -	DB1EF	- / -16	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
153300 -15 1385  GM4SUF IK2VFR/P 73
153200 -15 1730  GM4SUF R7OV R-13 (x3)
151030  -5  697  GM4SUF EA3EDU JN01 (x7)

20m

UTC    dB Audio  Message
125445  -4 1366  GM4SUF F4GPB JN23 (x2)
125800 -18 1840  SP9IMY GM4SUF RR73
125830 -14 1841  CQ GM4SUF IO77 (x2)
134430 -16 1239  GM4SUF PA2KV JO33
135045 -20 1238  S21AF GM4SUF IO77 (x2)
135315 -22 1238  DH5NC GM4SUF -21
135330 -12  545  GM4SUF DH5NC JN49 (x3)
135600  -4 1435  GM4SUF UT5MD KN69 (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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