UA3XFO — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO84

Receiver-side FT8 activity involving UA3XFO, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-27 and 2026-09-20.

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 30 FT8 messages attributed to UA3XFO as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (83%), followed by 20 m (17%). Most decodes (63%) fell within the six-hour window 13:00-19:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (60%); the estimated median was -19 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-19 dB

Estimated median S/N

Bands

40m · 25 20m · 5

First attributed message: 2026-06-27
Last attributed message: 2026-09-20 17:48 UTC

Observed FT8 message patterns

Attributed sample: 30 messages
Active dates: 5 UTC dates
Estimated median S/N: -19 dB
Estimated 10th-90th percentile: -23 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 8.

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 UA3XFO in decoded directed-looking exchanges:

RA9UDY · Asiatic Russia DL7ARV · Fed. Rep. of Germany DL7DL · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina MW0USK · Wales OK5AG/P · Czech Republic OZ7CL · Denmark R1CBW · European Russia R5BM · European Russia RU3XX · European Russia RV3YN · European Russia RW3DDZ · European Russia

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 UA3XFO

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: KO84 · 14 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,150 km (approx.)
Last such locator decoded: 2026-09-20 17:47 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	UA3XFO S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 17:47	40m	-9 / -23	MW0USK	0 / -2	5	✓ Full exchange observed
09-20 17:41	40m	-2 / -	R9JE	- / -	3	Partial capture
08-30 13:52	40m	-20 / -10	RZ6AKF	-7 / +2	6	✓ Full exchange observed
08-30 13:48	40m	- / -18	RV3YN	-16 / -	5	✓ Closing fragment
08-30 13:38	40m	-20 / +8	RU3XX	-12 / +2	4	✓ Full exchange observed
08-30 13:36	40m	-22 / -22	DL7DL	+4 / -22	6	✓ Full exchange observed
08-30 13:20	40m	- / -	DL7DL	-10 / -	3	Partial capture
08-02 15:13	40m	- / -17	OK5AG/P	-14 / -	2	✓ Closing fragment
07-31 19:48	40m	-6 / -	RW3DDZ	- / +6	2	✓ Closing fragment
07-31 19:47	40m	- / -4	RW4HBD	-19 / -	2	✓ Closing fragment
06-27 23:11	20m	-22 / -	RA9UDY	- / -7	2	✓ Closing fragment
06-27 22:48	40m	- / +1	E70SZ	-4 / -	3	✓ Closing fragment
06-27 22:35	40m	- / -4	IQ4JO	-4 / -	2	Partial capture
06-27 22:30	40m	- / +9	R5BM	-15 / -	3	✓ Closing fragment
06-27 22:24	40m	- / -4	DL7ARV	-2 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
135215  -8 1472  UA3XFO RZ6AKF -10
135230 -19 1988  RZ6AKF UA3XFO R+02
135245  -8 1472  UA3XFO RZ6AKF -10
135300 -20 1989  RZ6AKF UA3XFO R-01
135315  -4 1989  UA3XFO RZ6AKF RR73
135330 -20 1989  RZ6AKF UA3XFO 73
174145  -3 2762  R9JE UA3XFO KO84 (x3)
174630  -4 1738  R1CBW UA3XFO 73
174730 -10  899  MW0USK UA3XFO KO84
174745  +0  900  UA3XFO MW0USK -23
174800  -7  899  MW0USK UA3XFO R-02
174815  +0  900  UA3XFO MW0USK RR73
174830 -11  899  MW0USK UA3XFO 73

20m

UTC    dB Audio  Message
230745 -19 2209  CQ UA3XFO KO84
230800  -5  757  UA3XFO T77RN -08
230900 -20 1333  CQ UA3XFO KO84
230945 -18 1333  UA3XFO IQ0FN R+10
231030 -20 1333  CQ UA3XFO KO84
231045  +5 2855  UA3XFO IQ4JO JN63
231100 -21 1333  RA9UDY UA3XFO -07 (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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