RU3OZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO91

Receiver-side FT8 activity involving RU3OZ, decoded by SO8OO in southeastern Poland. 730 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 32 UTC dates in the available aggregate history. Observed between 2026-06-12 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 730 FT8 messages attributed to RU3OZ as the transmitting token by decoded message structure across 32 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (42%), followed by 80 m (20%) and 10 m (18%). Most decodes (77%) 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 -7 dB.

Overview

730

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

160m · 119 80m · 147 40m · 308 20m · 25 10m · 131

First attributed message: 2026-06-12
Last attributed message: 2026-09-20 18:12 UTC

Observed FT8 message patterns

Attributed sample: 730 messages
Active dates: 32 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -19 to +5.5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 145, moderate (-15 to -9 dB) 181, strong (≥ -8 dB) 404.

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 RU3OZ in decoded directed-looking exchanges:

RN1ON · European Russia ×2 RA3WY · European Russia ×2 RL7Z · European Russia ×2 G5GDX · England ×2 OZ9FF · Denmark ×2 R70OBN · European Russia ×2 R9OOF · Asiatic Russia ×2 RC6OD · European Russia ×2 TN8GD · Republic of the Congo ×2 DL7RAY · Fed. Rep. of Germany EU4U · Belarus LU3CM · Argentina

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 RU3OZ

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: KO91 · 371 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,221 km (approx.)
Last such locator decoded: 2026-09-20 18:12 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	RU3OZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 18:02	160m	-15 / -5	RL7Z	-5 / -	6	✓ Full exchange observed
09-16 04:09	40m	-12 / -	R9LY	- / -	8	Partial capture
09-16 03:58	40m	-10 / -	4L1FL	- / +5	4	Partial capture
09-16 03:57	40m	-10 / -	R9WCK	- / -10	2	✓ Closing fragment
09-14 17:48	80m	0 / -13	R9OOF	-6 / -	4	✓ Closing observed
09-14 17:36	40m	+6 / -	JA4TKY	- / -14	3	✓ Closing fragment
09-14 17:34	40m	+1 / -	UN7PPV	- / -13	4	✓ Closing fragment
09-14 17:26	40m	-1 / -5	R9OOF	+5 / -2	6	✓ Full exchange observed
09-14 17:22	40m	0 / -	UB8CRM	- / -22	5	✓ Closing fragment
09-14 17:14	40m	-7 / -4	M0BEW	+2 / -2	5	✓ Full exchange observed
09-12 17:02	160m	-16 / -	RT4A/P	- / -	5	Partial capture
09-12 16:58	160m	-17 / +5	RL3F	-14 / -12	11	✓ Full exchange observed
09-12 16:57	160m	-20 / -2	RU3DBT	-24 / -7	4	✓ Full exchange observed
09-12 16:51	160m	-10 / -	R3PA	- / +4	3	✓ Closing fragment
09-12 16:45	160m	-14 / -	RT4A/P	- / -	7	Partial capture
09-12 16:38	160m	-11 / -	RA9ACA	- / -	4	Partial capture
09-12 16:30	160m	-10 / -	4L7T	- / -	12	Partial capture
09-11 16:37	160m	-20 / +3	RM3ZR	-10 / -	4	✓ Closing observed
09-11 16:33	160m	-20 / +2	RA3QTT	-4 / -	5	✓ Full exchange observed
09-04 23:37	40m	-13 / -	TN8GD	- / -20	5	✓ Closing fragment
09-04 23:36	40m	-9 / -	9A/FR1JB	- / -10	3	Partial capture
09-04 23:33	40m	-8 / -	D44TWO	- / -	3	Partial capture
09-04 23:28	40m	-7 / -	LZ2VQ	- / -	3	Partial capture
09-04 23:24	40m	-9 / -11	CR7BRV	-4 / -	4	✓ Closing observed
09-04 23:17	40m	-10 / -	TC2EYL	-11 / -5	4	✓ Closing observed
09-04 23:14	40m	+1 / -	EX7CQ	- / -7	2	Partial capture
09-04 23:10	40m	-3 / -	TN8GD	- / -21	7	✓ Closing fragment
09-04 23:08	40m	-4 / -	RC1C	- / -	2	Partial capture
09-04 23:01	40m	0 / -	TT1GD	- / -11	5	✓ Closing fragment
09-04 22:57	40m	+5 / -5	K5OA	-4 / 0	8	✓ Full exchange observed
09-04 22:54	40m	+1 / -	ZP6LFF	- / -	5	Partial capture
09-04 22:52	40m	+3 / -12	R6OK	-4 / -	5	Partial capture
09-04 22:50	40m	+4 / -	RI1FJL	- / +3	3	✓ Closing fragment
09-01 00:55	40m	-3 / -5	RD9U	-10 / -2	8	✓ Closing observed
09-01 00:51	40m	-2 / -	W4WHQ	- / -	3	Partial capture
09-01 00:46	40m	-3 / +2	W9OO	+3 / -	8	✓ Full exchange observed
09-01 00:45	40m	-2 / -	NG9J	- / -	2	Partial capture
09-01 00:40	40m	- / -4	IW1GB	-8 / -	2	Partial capture
09-01 00:39	40m	-2 / -	G5GDX	-7 / -	2	✓ Closing observed
08-27 19:08	40m	- / -4	UC6D	+6 / -	2	Partial capture
08-27 19:00	40m	-5 / -	F4SNF	-11 / -	2	✓ Closing observed
08-27 18:58	40m	-7 / -	2E0LMA	- / -	3	Partial capture
08-27 18:56	40m	-2 / -	R1BPQ	- / -6	3	✓ Closing fragment
08-27 18:54	40m	-4 / -12	EG5DX	-12 / -8	4	✓ Full exchange observed
08-27 18:52	40m	-4 / -6	R6DZD	-6 / -4	4	✓ Full exchange observed
08-27 18:51	40m	-3 / +2	S59YL	+7 / -1	5	✓ Full exchange observed
08-27 18:46	40m	0 / -	OZ9FF	+2 / -8	5	✓ Closing observed
08-27 18:45	40m	-4 / -	R3UDU	- / -3	3	✓ Closing fragment
08-27 07:27	40m	-18 / -	<...>	- / -15	2	Partial capture
08-27 07:20	40m	-24 / -	R2SL	-19 / +2	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
170115 -14 1828  RL3F RU3OZ R-13
170130 -17 1143  RU3OZ RL3F RR73
170145 -13 1828  RL3F RU3OZ 73
170215 -17 1828  RT4A/P RU3OZ KO91 (x5)
180200 -21 1965  RL7Z RU3OZ KO91
180215  +0 2108  RU3OZ RL7Z -05 (x2)
180300 -12 1965  RL7Z RU3OZ R+15
180315  -9 2108  RU3OZ RL7Z RR73
180330 -11 1964  RL7Z RU3OZ 73
181230 -10 1964  R6AA RU3OZ KO91

40m

UTC    dB Audio  Message
035815 -13 2135  R9WCK RU3OZ 73
035845 -10 2135  4L1FL RU3OZ KO91 (x4)
040145  -5 1629  UA9JTJ/9 RU3OZ KO91
040445 -16 1716  4L1FL RU3OZ R+05
040900 -10 1715  R9LY RU3OZ KO91 (x8)

80m

UTC    dB Audio  Message
174400  +7 2124  R4HNW RU3OZ KO91
174515  +6  647  RK6OQ RU3OZ KO91
174530 +12  647  RU3OZ RK6OQ +03
174545  +6  647  RK6OQ RU3OZ R+02
174600 +12  647  RU3OZ RK6OQ RR73
174615  +3  647  RK6OQ RU3OZ 73
175000  -6  787  RU3OZ UA9FFV -08
175015  +7 2039  UA9FFV RU3OZ R-08
175030  -7  787  RU3OZ UA9FFV RR73
175045  +1 2039  UA9FFV RU3OZ 73
174730  +9 2100  RA9SJG RU3OZ KO91
174845  -6 2100  R9OOF RU3OZ KO91
174900  -3 1593  RU3OZ R9OOF -13 (x2)
174945  +6 2100  R9OOF RU3OZ 73

10m

UTC    dB Audio  Message
190100  -5 1145  PY5NBX RU3OZ R-15
190215  -1 1145  PY4BSC RU3OZ KO91
190315  -3 1144  PU6PSK RU3OZ KO91
190430  -2 1189  PY2ABL RU3OZ KO91 (x2)
190745 -10 1188  PY4BSC RU3OZ R-18 (x4)
191000 -12 1687  LU3CM RU3OZ KO91 (x3)
191200 -21 1687  PY3XD RU3OZ KO91 (x2)
141415 -16 1299  RU3OZ OZ/KD0NDU -09

20m

UTC    dB Audio  Message
083115 -22 1500  <...> RU3OZ KO91 (x4)
091330  -9 2557  RU3OZ PD1DTH -13 (x2)
091415 -24 1500  PD1DTH RU3OZ R-09
091430  -8 2557  RU3OZ PD1DTH RR73
091445 -21 1499  PD1DTH RU3OZ 73
172330 -22 1444  VU4R RU3OZ KO91 (x4)
123245 -15  737  RI0FA RU3OZ KO91 (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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