GM0SDV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Scotland Most frequent locator attributed to this token: IO75

Receiver-side FT8 activity involving GM0SDV, decoded by SO8OO in southeastern Poland. 1,281 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 59 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-19.

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 1,281 FT8 messages attributed to GM0SDV as the transmitting token by decoded message structure across 59 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (75%), followed by 40 m (24%) and 80 m (0%). Most decodes (60%) 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 -9 dB.

Overview

1,281

Messages attributed

UTC dates decoded

249

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 1 40m · 313 20m · 967

First attributed message: 2026-06-07
Last attributed message: 2026-09-19 20:29 UTC

Observed FT8 message patterns

Attributed sample: 1,281 messages
Active dates: 59 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -18 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 242, moderate (-15 to -9 dB) 415, strong (≥ -8 dB) 624.

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 GM0SDV in decoded directed-looking exchanges:

F1PBZ · France ×2 IQ4JO · Italy ×2 R6DZR · European Russia ×2 UI6O · European Russia ×2 HA7TM · Hungary ×2 PI4TX · Netherlands ×2 R2FBW · Kaliningrad ×2 UA4FKT · European Russia ×2 DL3NGN · Fed. Rep. of Germany IK4LZH · Italy BA7LUI · China BG7BMG · China

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 GM0SDV

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: IO75 · 199 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,894 km (approx.)
Last such locator decoded: 2026-09-19 20:29 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	GM0SDV S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 17:53	40m	- / -7	OZ2LC	-9 / -	8	Partial capture
09-19 17:52	40m	- / -	ON1PK	-6 / -	2	Partial capture
09-19 11:59	40m	- / -13	DB8BT	-16 / -	3	✓ Closing fragment
09-18 17:06	40m	- / -8	ON1WFF	-12 / -	2	Partial capture
09-18 17:00	40m	- / -	US7LM	+8 / -	3	Partial capture
09-18 16:54	40m	- / -15	F8MRQ	0 / -	3	✓ Closing fragment
09-18 11:38	40m	- / -	DD7EE	-12 / -	2	Partial capture
09-17 18:16	40m	-11 / -	PF1B	- / -	2	Partial capture
09-17 17:45	40m	- / -	DL8YBL	-11 / -	3	Partial capture
09-17 16:12	40m	- / 0	LA2GCA	-17 / -	3	✓ Closing fragment
09-17 15:55	40m	- / -3	DL8TV	+2 / -	3	✓ Closing fragment
09-17 13:39	40m	- / -	DL3DTL	-8 / -	5	Partial capture
09-17 11:34	40m	- / +1	DL6UXL	-8 / -	7	✓ Closing fragment
09-17 11:22	40m	- / -	DL2BCY	-20 / -	2	✓ Closing fragment
09-16 12:50	40m	- / -5	DL6EL	-4 / -	4	✓ Closing fragment
09-15 19:42	40m	- / -	DD8HG	-10 / -	7	Partial capture
09-15 19:29	40m	- / -	9A/OK2JRQ	0 / -	3	Partial capture
09-15 19:28	40m	- / -6	M0IEP	-8 / -	3	✓ Closing fragment
09-15 18:28	40m	-4 / +2	UA4FKT	+6 / -	8	✓ Closing observed
09-15 17:11	40m	- / +2	US2YW	0 / -	4	✓ Closing fragment
09-15 16:15	40m	- / -	DF5DY	-2 / -	5	Partial capture
09-15 10:51	40m	- / -19	HA7TM	0 / -	5	✓ Closing fragment
09-15 09:38	40m	- / -	S55OO	-15 / -	3	✓ Closing fragment
09-14 19:30	40m	-12 / -	UX5UW	-9 / -	2	✓ Closing observed
09-14 19:28	40m	-7 / +5	M0BEW	-6 / +5	3	✓ Full exchange observed
09-14 19:25	40m	- / -9	IZ0DIB	-11 / -	11	Partial capture
09-14 19:25	40m	-8 / +8	ON1JP	-23 / -13	3	Partial capture
09-14 19:21	40m	-9 / -18	DH8BAB	-1 / -9	4	✓ Full exchange observed
09-14 19:16	40m	- / -	S51PV	-6 / -	2	Partial capture
09-14 19:16	40m	-13 / -	HG8LXL	- / -	2	Partial capture
09-14 19:16	40m	- / -	R6LPF	-3 / -	8	Partial capture
09-14 10:45	40m	- / -	OE6OCG	-10 / -	4	Partial capture
09-14 10:20	40m	- / -	HG8LXL	-8 / -	4	Partial capture
09-14 10:19	40m	- / -	OE6OCG	-14 / -	2	Partial capture
09-14 10:06	40m	- / -	DL6KVB	-12 / -	2	Partial capture
09-13 20:20	40m	- / -	HB9ZHK	-20 / -	2	Partial capture
09-13 19:40	40m	- / -	M1EAG	-10 / -	3	Partial capture
09-13 19:39	40m	- / -5	DF7NO	-4 / -	9	✓ Closing fragment
09-12 20:46	40m	-4 / -	DL9FFM	-18 / -	3	✓ Closing observed
09-12 20:37	40m	- / -	SP1ZMO	-4 / -	4	Partial capture
09-12 20:33	40m	- / -	F1HSY	-12 / -	3	Partial capture
09-12 20:32	40m	- / -3	IU2WCY	+8 / -	4	Partial capture
09-12 20:25	40m	-2 / -	R2FBW	-11 / -	10	✓ Closing observed
09-12 20:21	40m	-7 / -18	EA3EDU	-5 / +8	6	✓ Full exchange observed
09-12 20:20	40m	-5 / -9	PE1LYU	-17 / +4	2	Partial capture
09-12 19:57	40m	-9 / -7	DH0GBC	-1 / -	3	✓ Closing observed
09-12 19:49	40m	- / -12	IZ0ZIP	-6 / -	2	Partial capture
09-12 19:45	40m	- / +6	PE1PEO	-6 / -	3	✓ Closing fragment
09-12 19:37	40m	-13 / -	HA7TM	-21 / -1	2	✓ Closing observed
09-12 19:22	40m	-7 / -16	SQ1RTU	+1 / -	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
115915 -15 1283  GM0SDV DB8BT JO42 (x3)
175230  -6  437  GM0SDV ON1PK JO20 (x2)
175330  -8  595  GM0SDV OZ2LC -07 (x8)
201430  -7 1346  GM0SDV DF9DL R-11
202945 -18 1356  CQ GM0SDV IO75

80m

UTC    dB Audio  Message
185100  -8 1113  GM0SDV DK7ZT -18 (x3)
185615 -24 1223  R3VE GM0SDV +05

20m

UTC    dB Audio  Message
124900  +9 2552  JA0FVU GM0SDV -17 (x3)
125030  +1  762  YT7DX GM0SDV -16 (x4)
125445  -2 2303  RK1AA GM0SDV IO75 (x3)
130230  -1 2383  JA7OYF GM0SDV -14 (x3)
130430 -10 2429  JG0EXP GM0SDV -13 (x2)

60m

UTC    dB Audio  Message
162100  -3 1863  GM0SDV ES2AJ -10 (x2)

10m

UTC    dB Audio  Message
102315  +2 2687  GM0SDV F1PBZ -10 (x2)
105415 -19 1151  GM0SDV DL3NGN 73
105545 -15 2341  GM0SDV F1PBZ -15
105945  +7  492  GM0SDV IK4LZH JN54 (x4)
151815  -9 2685  GM0SDV F1PBZ -19

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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