GM0OTB — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving GM0OTB, decoded by SO8OO in southeastern Poland. 36 FT8 messages attributed to this token as transmitter, on 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-07-17.

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 36 FT8 messages attributed to GM0OTB 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%). 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 -13 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

20m · 36

First attributed message: 2026-06-07
Last attributed message: 2026-07-17 09:06 UTC

Observed FT8 message patterns

Attributed sample: 36 messages
Active dates: 7 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -21 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 7.

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 GM0OTB in decoded directed-looking exchanges:

DL0BSO · Fed. Rep. of Germany DL3MIB · Fed. Rep. of Germany DL3NGN · Fed. Rep. of Germany DN9BLN · Fed. Rep. of Germany DO1FDK · Fed. Rep. of Germany DO1IJB · Fed. Rep. of Germany DO3PKE · Fed. Rep. of Germany F1PBZ · France F4FSY · France IK1RQX · Italy IQ4JO · Italy RD3AW · European Russia

Most frequent locator attributed to GM0OTB

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 · 24 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,894 km (approx.)
Last such locator decoded: 2026-07-17 09:06 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	GM0OTB S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-09 13:51	20m	- / -	DG5PW	-15 / -	3	Partial capture
07-24 20:17	10m	- / -1	F1PBZ	-2 / -	2	✓ Closing fragment
07-24 16:34	10m	- / -	DO3PKE	-2 / -	2	✓ Closing fragment
07-17 09:06	20m	- / -	ON7DE	-22 / -	2	Partial capture
07-05 20:35	80m	- / -	G4RJS	-1 / -	2	Partial capture
07-05 20:34	80m	- / -9	TM2WWA	-1 / -	2	✓ Closing fragment
06-30 20:25	20m	- / -20	IU2RPR	-18 / -	2	Partial capture
06-29 19:46	10m	- / -8	SM4TIW	-10 / -	3	✓ Closing fragment
06-26 16:26	10m	- / -17	DL0BSO	-12 / -	4	✓ Closing fragment
06-26 16:13	10m	- / -16	DO1FDK	-10 / -	2	✓ Closing fragment
06-26 16:09	10m	- / -	DO1FDK	-12 / -	2	Partial capture
06-26 16:09	10m	- / -	IK1RQX	+3 / -	3	✓ Closing fragment
06-25 20:09	10m	- / -7	UA6YW	+13 / -	2	✓ Closing fragment
06-25 20:04	10m	- / -6	DL3MIB	-2 / -	3	✓ Closing fragment
06-25 20:02	10m	- / +2	DN9BLN	-6 / -	2	✓ Closing fragment
06-25 19:55	10m	- / -18	RD3AW	-16 / -	3	✓ Closing fragment
06-25 19:52	10m	- / -	DO1IJB	-16 / -	3	✓ Closing fragment
06-25 18:07	10m	- / -22	IQ4JO	-11 / -	3	✓ Closing fragment
06-25 17:48	10m	- / -6	9A2KS	-9 / -	4	Partial capture
06-24 19:06	10m	- / -22	IQ4JO	0 / -	5	Partial capture
06-23 15:42	20m	-11 / -	DL1R	- / -14	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
201615 -22 2151  CQ GM0OTB IO75 (x2)
201700  -6 2876  GM0OTB EI/TF1OL -18
202030  -8  446  JA6CNL GM0OTB IO75
202545 -19 1163  GM0OTB IU2RPR JN45 (x2)
203800 -12 3058  K3WHD GM0OTB -12
204015 -17 1377  PP5HR GM0OTB IO75
090600  -6 2662  CQ TEST GM0OTB IO75
090645 -22 1818  GM0OTB ON7DE JO20 (x2)
145430  -1 2820  GM0OTB F1PBZ -06
135130 -15 2340  GM0OTB DG5PW JO30 (x3)

10m

UTC    dB Audio  Message
161045  +0 2616  GM0OTB IK1RQX 73
161315 -11 2447  GM0OTB DO1FDK R-16 (x2)
162615 -12 1500  GM0OTB DL0BSO JO42 (x4)
194600 -15 2343  GM0OTB SM4TIW JO79 (x3)
162100  +5 1591  GM0OTB DO3PKE JO61 (x3)
201730  +1 2796  GM0OTB F1PBZ -01 (x2)

80m

UTC    dB Audio  Message
203415  -4 1167  GM0OTB TM2WWA -09 (x2)
203545  +0  760  GM0OTB G4RJS IO93 (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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