G3ZSU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: England Most frequent locator attributed to this token: IO92

Receiver-side FT8 activity involving G3ZSU, decoded by SO8OO in southeastern Poland. 875 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 33 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-09-21.

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 875 FT8 messages attributed to G3ZSU as the transmitting token by decoded message structure across 33 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (52%), followed by 80 m (24%) and 20 m (22%). Most decodes (66%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10.6 dB.

Overview

875

Messages attributed

UTC dates decoded

118

Active 15-min windows

-10.6 dB

Estimated median S/N

Bands

160m · 5 80m · 206 40m · 459 20m · 194 10m · 11

First attributed message: 2026-06-11
Last attributed message: 2026-09-21 05:52 UTC

Observed FT8 message patterns

Attributed sample: 875 messages
Active dates: 33 UTC dates
Estimated median S/N: -10.6 dB
Estimated 10th-90th percentile: -19.3 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 234, moderate (-15 to -9 dB) 283, strong (≥ -8 dB) 358.

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 G3ZSU in decoded directed-looking exchanges:

5Z4VJ · Kenya ×2 HF5A · Poland ×2 RN6MA · European Russia ×2 DA1ST · Fed. Rep. of Germany ×2 TJ1GD/P · Cameroon ×2 UA4FKT · European Russia ×2 PA5TON · Netherlands ×2 IK4LZH · Italy DL7UKM · Fed. Rep. of Germany DO2RG · Fed. Rep. of Germany LZ2IP · Bulgaria OK1DXR · Czech Republic

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 G3ZSU

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: IO92 · 476 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,606 km (approx.)
Last such locator decoded: 2026-09-21 05:51 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	G3ZSU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 05:53	40m	- / -	IZ2EWN	+5 / -	4	Partial capture
09-21 05:51	40m	-6 / -	DG1YHP	+1 / -	3	✓ Closing observed
09-21 05:50	40m	-3 / -5	EU6KA	0 / -	4	✓ Closing observed
09-21 05:49	40m	-8 / -	IK4TVP	-7 / +8	2	✓ Closing observed
09-19 06:04	80m	- / -1	DA1ST	-3 / -	3	✓ Closing fragment
09-19 06:02	80m	- / -12	DJ2PW	-17 / -	4	✓ Closing fragment
09-19 05:56	80m	- / +6	ON7HM	-17 / -	3	Partial capture
09-19 05:34	40m	- / -11	I2XYI	-7 / -	5	✓ Closing fragment
09-19 05:21	40m	-6 / -	KG6PH	- / -	4	Partial capture
09-19 05:15	40m	-16 / -	OA4ENG	- / -19	4	Partial capture
09-19 05:12	40m	-18 / -	EA7UW	- / +7	3	✓ Closing fragment
09-19 05:09	40m	-16 / -	ZL3IO	- / -	2	✓ Closing fragment
09-14 06:33	40m	- / 0	DA1ST	-15 / -	3	✓ Closing fragment
09-14 06:27	40m	-6 / -	SP2JEL	+2 / -15	3	Partial capture
09-14 06:26	40m	- / -	SP5EXA	-9 / -	5	Partial capture
09-14 06:02	40m	-18 / -	D44TWO	- / -	2	Partial capture
09-14 05:30	40m	-14 / -	VP5/K5UR	- / -	5	Partial capture
09-14 05:29	40m	-10 / -	R3DIK/M	- / -	2	Partial capture
09-14 05:27	40m	-8 / -	D44TWO	- / -	2	Partial capture
09-14 05:26	40m	-6 / -15	IQ4JO	-13 / -13	4	✓ Full exchange observed
09-14 05:22	40m	-10 / -10	R5AV	-8 / -	4	✓ Full exchange observed
09-06 03:59	40m	-12 / -	KT8Z	- / -12	3	✓ Closing fragment
09-06 03:57	40m	-9 / -13	DJ2DL	-14 / -17	6	✓ Full exchange observed
09-06 03:50	40m	- / -4	ON1DGN	-16 / -	2	Partial capture
09-06 03:43	40m	-9 / +4	UR4QWW	-12 / +3	5	✓ Full exchange observed
09-06 03:30	40m	-7 / -	Z62NS	- / -	2	Partial capture
09-06 03:28	40m	-4 / -5	T77NC	+2 / +7	6	✓ Full exchange observed
09-06 03:25	40m	-6 / -	4O7CC	- / -4	3	✓ Closing fragment
09-04 21:01	80m	-9 / 0	RI1FJL	-12 / -	8	Partial capture
09-04 20:56	80m	-10 / -	RI1FJL	- / -	4	Partial capture
09-04 20:51	80m	-5 / -	RI1FJL	- / -	4	Partial capture
09-04 20:48	80m	-10 / -16	E75C	+11 / -	3	✓ Closing observed
09-04 20:44	80m	-9 / -	SV5ADM	- / -	2	Partial capture
09-01 19:54	160m	- / -6	LZ2IP	+13 / -	3	✓ Closing fragment
09-01 19:41	160m	- / -5	DO2RG	-12 / -	3	✓ Closing fragment
09-01 19:41	160m	-15 / -11	OK1DXR	-2 / -	6	✓ Full exchange observed
09-01 19:39	160m	-15 / -	DL7UKM	-14 / -	3	✓ Closing observed
08-31 16:38	20m	-7 / -	HF5A	- / -	2	✓ Closing fragment
08-31 16:37	20m	-7 / -	R8LCA	- / -9	3	Partial capture
08-31 16:28	20m	-4 / -21	TA2EE	-6 / -12	8	Partial capture
08-31 16:19	20m	-9 / -	7Q7CT	-8 / -2	2	✓ Closing observed
08-29 20:58	40m	- / -	OE7FTI	-8 / -	2	Partial capture
08-29 20:56	40m	-2 / -	TA2EE	-11 / -14	3	✓ Closing observed
08-29 20:52	40m	-2 / -	DU1RAA	- / -	3	Partial capture
08-29 20:46	40m	-6 / -13	RN6MA	0 / +2	3	✓ Full exchange observed
08-29 17:18	40m	-7 / -	<...>	- / -	5	Partial capture
08-28 23:01	80m	-14 / -	9V1YC	- / -	6	Partial capture
08-28 22:53	80m	-13 / -	VU2MSA	- / -12	7	Partial capture
08-28 22:47	80m	-17 / 0	4X1UF	-24 / -	7	Partial capture
08-28 22:16	80m	0 / -	C31KC	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
054845  -6  803  CQ G3ZSU IO92
054915  -8  803  IK4TVP G3ZSU R+08
054930  -7 1806  G3ZSU IK4TVP RR73
055000  -1  805  G3ZSU EU6KA KO55 (x2)
055045  -3  802  EU6KA G3ZSU RR73
055100  +1  805  G3ZSU EU6KA 73
055115  -5  802  CQ G3ZSU IO92
055130  +0  802  G3ZSU DG1YHP JO31 (x2)
055215  -6  801  DG1YHP G3ZSU RR73
055330  +1  941  G3ZSU IZ2EWN JN45 (x4)

80m

UTC    dB Audio  Message
210430  -4 2008  RI1FJL G3ZSU IO92
210445 -12  329  G3ZSU RI1FJL +00 (x2)
055645 -17 2152  G3ZSU ON7HM JO10 (x3)
055915  -3 1830  G3ZSU DA1ST JO41
060215 -17 1831  G3ZSU DJ2PW JN39 (x4)
060445  +0 1830  G3ZSU DA1ST JO41
060515 -14  906  G3ZSU ON4AZM JO11
060515  -3 1830  G3ZSU DA1ST R-01 (x2)

160m

UTC    dB Audio  Message
194115  +6 1195  G3ZSU OK1DXR JO60
194115  -6 1538  G3ZSU DO2RG JO52
194145  -4 1195  G3ZSU OK1DXR JO60
194145 -16 1538  G3ZSU DO2RG R-05
194215  -5 1195  G3ZSU OK1DXR JO60
194215 -13 1538  G3ZSU DO2RG 73
194230 -15 2504  OK1DXR G3ZSU +33
194245 -13 1195  G3ZSU OK1DXR R-11 (x2)
194700 -18  954  4X1UF G3ZSU R+04
195230 -18  954  CQ G3ZSU IO92                         a1
195400 -16  954  SP2GJI G3ZSU IO92
195445 +12 1491  G3ZSU LZ2IP KN22 (x3)

20m

UTC    dB Audio  Message
163045  -7  842  G3ZSU TA2EE R-21 (x3)
163300  +1 2039  CQ G3ZSU IO92 (x3)
163430 -11 2038  R7OV G3ZSU -05
163530  -7 2037  CQ G3ZSU IO92 (x3)
163700  -9 2035  R8LCA G3ZSU -09 (x3)
163830  -4 2033  HF5A G3ZSU +13 (x2)

10m

UTC    dB Audio  Message
144615  -4  491  G3ZSU IK4LZH JN54 (x5)
172200 -13 1805  G3ZSU RN6MA -15 (x2)
191445 -23 2036  G3ZSU DN9DZ JO31
091415 -16  831  G3ZSU IK1AMC JN44
150745  -1 2108  G3ZSU IK1RQX JN44

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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