GM4UYZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Scotland Most frequent locator attributed to this token: IO85

Receiver-side FT8 activity involving GM4UYZ, decoded by SO8OO in southeastern Poland. 40 FT8 messages attributed to this token as transmitter, on 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-15 and 2026-08-14.

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 40 FT8 messages attributed to GM4UYZ as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

20m · 40

First attributed message: 2026-06-15
Last attributed message: 2026-08-14 09:42 UTC

Observed FT8 message patterns

Attributed sample: 40 messages
Active dates: 7 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -23 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 10.

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 GM4UYZ in decoded directed-looking exchanges:

DL7EDU · Fed. Rep. of Germany EA3NY · Spain F4HSB · France F4MTS · France R50RKZ · European Russia RV9CD · Asiatic Russia RZ3EM · European Russia S50R · Slovenia SA3SHN · Sweden DL6UM · Fed. Rep. of Germany F6HRP · France PF7DKW · Netherlands

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 GM4UYZ

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: IO85 · 18 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,769 km (approx.)
Last such locator decoded: 2026-08-14 09:16 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	GM4UYZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 09:10	40m	- / -12	F6HRP	-16 / -	2	✓ Closing fragment
09-08 09:06	40m	- / -16	DL6UM	-2 / -	3	✓ Closing fragment
09-08 08:51	40m	- / -12	PE1NAO	-20 / -	2	Partial capture
08-14 09:40	20m	-18 / -	RV9CD	- / -16	3	✓ Closing fragment
08-14 09:21	20m	- / -3	R50RKZ	-4 / -	2	✓ Closing fragment
08-09 09:32	20m	- / +3	OH3MB	-18 / -	3	Partial capture
08-09 09:26	20m	- / -9	YO6LM	-7 / -	6	Partial capture
08-08 09:41	20m	- / -17	EN35UKR	-12 / -	3	Partial capture
07-16 10:26	20m	-9 / -	2E1HAT	- / -12	2	Partial capture
07-16 10:18	20m	-18 / -	<...>	- / -22	3	Partial capture
07-15 09:57	20m	- / -1	EA3NY	0 / -	2	✓ Closing fragment
07-15 09:53	20m	-12 / -	SP1ZMO	- / -18	3	Partial capture
07-15 09:47	20m	-24 / -	F4MTS	-20 / -	2	✓ Closing observed
07-15 09:44	20m	-20 / -	UA1WA	- / -	2	Partial capture
07-15 09:36	20m	- / -10	S50R	-12 / -	2	✓ Closing fragment
07-15 09:32	20m	-17 / -	F4MTS	- / -	4	Partial capture
07-15 09:25	20m	-14 / -	SP6OPZ	- / -11	2	Partial capture
07-13 09:41	20m	- / -5	F4HSB	-20 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
094700  -9  539  GM4UYZ DJ0MAB JN49
094730  -5 1706  GM4UYZ SP100PKP -08
095900 -19 1231  GM4UYZ PA2RO -05
084900 -24 1413  GM4UYZ DK6WS -13
085100 -17 1540  GM4UYZ PE1NAO -12 (x2)
090115  -8 2137  GM4UYZ DL4JTH JO60
090645  -1  784  GM4UYZ DL6UM JO60 (x3)
091015 -15 2138  GM4UYZ F6HRP -12 (x2)
092800 -21 1683  GM4UYZ F4DIA -14
093130 -19 2225  GM4UYZ DJ0MAB JN49
093530 -12 1933  GM4UYZ PF7DKW RR73

20m

UTC    dB Audio  Message
092845  -6 2489  GM4UYZ YO6LM -12 (x4)
093215 -20 2243  GM4UYZ OH3MB KP20
093245  -7 2489  GM4UYZ YO6LM -13
093345 -18 2244  GM4UYZ OH3MB KP20 (x2)
091500 -21 1164  F4NJZ GM4UYZ R-14
091630 -12  849  OZ4HAM GM4UYZ IO85
092100  -3 2071  GM4UYZ R50RKZ -03 (x2)
094000 -18 1431  RV9CD GM4UYZ -16 (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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