W3FIZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN20

Receiver-side FT8 activity involving W3FIZ, decoded by SO8OO in southeastern Poland. 451 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-29.

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 451 FT8 messages attributed to W3FIZ as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (94%), followed by 80 m (3%) and 40 m (3%). Most decodes (80%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

451

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 14 40m · 12 20m · 425

First attributed message: 2026-06-06
Last attributed message: 2026-08-29 16:21 UTC

Observed FT8 message patterns

Attributed sample: 451 messages
Active dates: 11 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -18 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 115, moderate (-15 to -9 dB) 177, strong (≥ -8 dB) 159.

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 W3FIZ in decoded directed-looking exchanges:

CT8ACA · Azores DB1EF · Fed. Rep. of Germany EA3GXK · Spain EA5IXH · Spain F1PBZ · France F4ESO · France F5LOW · France G3MIK · England G3ZSU · England G4DBW · England G4UJS · England G6ZRV · England

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 W3FIZ

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: FN20 · 135 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,111 km (approx.)
Last such locator decoded: 2026-08-29 16:21 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	W3FIZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-29 18:44	20m	- / -	R6OIW	-13 / -	3	Partial capture
08-29 18:32	20m	- / -	4L7T	+6 / -	4	Partial capture
08-29 17:55	20m	- / -	DG1RS	+6 / -	5	Partial capture
08-29 17:55	20m	- / -	DG4SCG	-7 / -	4	Partial capture
08-29 17:40	20m	- / -	PB1PCH	-2 / -	3	Partial capture
08-29 17:38	20m	- / -	DG4SCG	-7 / -	11	Partial capture
08-29 17:32	20m	- / -	DM9EE	-2 / -	5	Partial capture
08-29 16:19	20m	-11 / -	RL6MT	- / -25	3	✓ Closing fragment
08-29 16:17	20m	-12 / -15	EA5IXH	-10 / -9	6	✓ Full exchange observed
08-29 16:15	20m	-12 / -	CT8ACA	- / +1	4	✓ Closing fragment
08-29 16:14	20m	- / -	DL3MIB	+5 / -	6	Partial capture
08-29 14:14	20m	- / -9	G6ZRV	-9 / -	5	✓ Closing fragment
08-29 14:13	20m	- / -	R4FDK	0 / -	7	Partial capture
08-29 14:07	20m	- / -	MW7TTA	-10 / -	2	Partial capture
08-29 14:02	20m	- / -	MW7TTA	-6 / -	2	Partial capture
08-27 16:00	20m	- / -	G6CZC	+2 / -	2	Partial capture
08-27 15:57	20m	- / -	PD0TVA	-4 / -	2	Partial capture
08-27 15:54	20m	-13 / -	M9OOS	+8 / -21	3	✓ Closing observed
08-27 15:53	20m	-12 / -	DG3YDE	- / -4	2	Partial capture
08-27 15:53	20m	- / -11	ON1JP	-17 / -	3	Partial capture
08-27 15:52	20m	-10 / -	K8ZI	- / +8	2	✓ Closing fragment
08-27 15:51	20m	-14 / -	VE9WZ	- / -9	2	✓ Closing fragment
08-27 15:47	20m	-12 / -3	G3ZSU	-6 / -8	8	✓ Full exchange observed
08-27 15:46	20m	-6 / -	PD9FLX	- / 0	2	✓ Closing fragment
08-27 15:44	20m	-9 / -	DL1JDS	- / -8	2	Partial capture
08-27 15:39	20m	-15 / -	DL1JDS	- / -8	4	Partial capture
08-27 15:36	20m	-15 / -15	ON4NYO	-1 / -5	5	✓ Full exchange observed
08-27 15:24	20m	- / -	G6PWS	-4 / -	3	Partial capture
08-27 15:21	20m	- / -8	G4UJS	-5 / -	2	✓ Closing fragment
08-27 15:16	20m	-7 / -	SQ1RTU	- / -4	3	✓ Closing fragment
08-27 15:15	20m	-8 / -	EA3GXK	- / -8	2	✓ Closing fragment
08-27 15:12	20m	-12 / -9	M9VVE	+2 / -25	19	✓ Full exchange observed
08-27 15:08	20m	- / -17	M7LYG	0 / -	3	✓ Closing fragment
08-27 15:02	20m	- / -	F4ETS	+2 / -	2	Partial capture
08-26 23:13	40m	- / -	HB9GWJ	-4 / -	4	Partial capture
08-26 22:53	20m	- / -4	F4JZW	-10 / -	4	Partial capture
08-07 00:55	20m	- / +5	IK4LZH	0 / -	3	✓ Closing fragment
08-07 00:54	20m	- / -3	F1PBZ	-10 / -	2	✓ Closing fragment
08-06 19:23	20m	- / -13	F4ESO	-16 / -	2	✓ Closing fragment
08-06 19:03	20m	- / -12	PA7Q	-11 / -	3	Partial capture
08-05 23:47	20m	-21 / -	IZ0AIO	- / -	3	Partial capture
07-29 18:38	20m	- / -11	G4DBW	-13 / -	3	✓ Closing fragment
07-29 18:23	20m	- / -14	YO6FCW	-12 / -	2	Partial capture
07-29 18:08	20m	- / -	DL1JH	-3 / -	2	Partial capture
07-29 15:12	20m	- / -	DL1R	+1 / -	8	Partial capture
07-26 21:00	20m	- / -	G1BJC	-3 / -	6	Partial capture
07-26 20:59	20m	- / -	M8KUG	-14 / -	8	Partial capture
07-26 20:42	20m	- / -8	M0URL	-12 / -	2	Partial capture
07-26 20:29	20m	- / -	IK4LZH	-6 / -	3	Partial capture
07-26 20:28	20m	- / -12	OS4K	-4 / -	6	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
175530  +4 2304  W3FIZ DG1RS JN49
175600  -9 1099  W3FIZ DG4SCG JN48
175600  +9 2304  W3FIZ DG1RS JN49 (x2)
175700  -4 1099  W3FIZ DG4SCG JN48
175700 +11 2304  W3FIZ DG1RS JN49
180100 -12  627  W3FIZ ON4LDZ JO20
182830  -8 1100  W3FIZ PD3LKN JO22
183200  +7 2473  W3FIZ 4L7T LN21 (x4)
184400 -11 1543  W3FIZ R6OIW KN86 (x3)

40m

UTC    dB Audio  Message
021845  -1 2135  W3FIZ PI4DX JO21 (x3)
015045  -7 2389  W3FIZ PA1PXL JO21 (x2)
015415  -1 2981  W3FIZ F4BYA JN19
015445 -11 1132  W3FIZ R6OIW KN86
015445  +2 2980  W3FIZ F4BYA JN19
015545 -17 1131  W3FIZ R6OIW KN86
015545  -3 2980  W3FIZ F4BYA JN19 (x2)
231345  -6 1268  W3FIZ HB9GWJ JN36 (x4)

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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