UB3DSR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO92

Receiver-side FT8 activity involving UB3DSR, decoded by SO8OO in southeastern Poland. 28 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-20 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 28 FT8 messages attributed to UB3DSR as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (68%), followed by 80 m (32%). Several six-hour UTC windows tied for the largest share (61%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

80m · 9 40m · 19

First attributed message: 2026-08-20
Last attributed message: 2026-09-20 02:47 UTC

Observed FT8 message patterns

Attributed sample: 28 messages
Active dates: 4 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -18 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 11.

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 UB3DSR in decoded directed-looking exchanges:

R4HHN · European Russia ×2 R9AL · Asiatic Russia EU6UE · Belarus R1BRZ · European Russia R4AGE/P · European Russia R4DB · European Russia RA6OQ · European Russia RV3WL · European Russia R2DRE · European Russia RC6OZ · European Russia UA3ZQN · 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 UB3DSR

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: KO92 · 11 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,229 km (approx.)
Last such locator decoded: 2026-09-20 02:46 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	UB3DSR S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 02:45	40m	-4 / -	R8CKD	- / -11	4	Partial capture
09-13 04:10	40m	- / -	RK6MC	-5 / -	2	Partial capture
09-13 04:08	40m	- / -13	RV3WL	+3 / -	2	✓ Closing fragment
09-13 04:04	40m	-18 / -	R9SBW	- / -18	2	Partial capture
09-13 03:45	40m	-18 / -	SM7TZK	- / -10	2	Partial capture
09-13 03:43	40m	-16 / -5	RA6OQ	-6 / -9	5	✓ Full exchange observed
08-24 17:52	80m	-12 / +2	UA3ZQN	+4 / +6	7	✓ Full exchange observed
08-24 17:51	80m	- / -	DL9KM	-15 / -	7	Partial capture
08-24 17:49	80m	-4 / -1	R4HHN	+1 / -	4	✓ Closing observed
08-24 17:47	80m	-12 / -8	R2DRE	-12 / +1	6	✓ Full exchange observed
08-24 17:25	40m	-8 / -	R1BRZ	- / -	5	✓ Closing fragment
08-20 16:51	40m	-8 / +7	EU6UE	-12 / -1	5	✓ Full exchange observed
08-16 18:36	20m	- / -9	<...>	-4 / -	2	Partial capture
08-09 06:13	20m	- / -6	R9AL	-2 / -	2	✓ Closing fragment
07-14 18:06	20m	- / -5	R6DJR	-18 / -	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
034430  -7 2103  UB3DSR RA6OQ RR73
034445 -15 2105  RA6OQ UB3DSR 73
034545 -18 2064  SM7TZK UB3DSR KO92 (x2)
040215 -22 2158  R4AGE/P UB3DSR 73
040430 -19 2427  R9SBW UB3DSR R-18 (x2)
040845  +0  481  UB3DSR RV3WL -13 (x2)
041015  -6 1460  UB3DSR RK6MC KN97 (x2)
024530  +0  484  R8CKD UB3DSR KO92 (x4)

80m

UTC    dB Audio  Message
175100  -8 1643  UB3DSR DL9KM JN68
175115  +4  725  RQ3D UB3DSR -15
175130 -12 1643  UB3DSR DL9KM JN68
175200  +8 2307  UB3DSR UA3ZQN KO90
175200 -11 1643  UB3DSR DL9KM JN68
175230  +3 2307  UB3DSR UA3ZQN KO90
175230 -18 1643  UB3DSR DL9KM JN68
175300  +6 2307  UB3DSR UA3ZQN KO90
175300 -15 1643  UB3DSR DL9KM JN68
175315 -13 2307  UA3ZQN UB3DSR +06
175330  +2 2307  UB3DSR UA3ZQN R+02
175330 -19 1643  UB3DSR DL9KM JN68
175345 -12 2307  UA3ZQN UB3DSR RR73
175400  +0 2307  UB3DSR UA3ZQN 73
175400 -24 1643  UB3DSR DL9KM JN68

20m

UTC    dB Audio  Message
180600 -16 1813  UB3DSR R6DJR -05 (x2)
061300  -3 1065  UB3DSR R9AL -06 (x2)
123430 -16 1420  UB3DSR DK3BK -16
183615  -5  820  UB3DSR <...> -09 (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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