RM3ZR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO90

Receiver-side FT8 activity involving RM3ZR, decoded by SO8OO in southeastern Poland. 1,829 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 45 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-09-19.

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 1,829 FT8 messages attributed to RM3ZR as the transmitting token by decoded message structure across 45 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (66%), followed by 80 m (21%) and 40 m (11%). Most decodes (97%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (80%); the estimated median was -2.2 dB.

Overview

1,829

Messages attributed

UTC dates decoded

274

Active 15-min windows

-2.2 dB

Estimated median S/N

Bands

160m · 1,214 80m · 392 40m · 199 20m · 3 10m · 21

First attributed message: 2026-06-20
Last attributed message: 2026-09-19 19:04 UTC

Observed FT8 message patterns

Attributed sample: 1,829 messages
Active dates: 45 UTC dates
Estimated median S/N: -2.2 dB
Estimated 10th-90th percentile: -12 to +5.6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 83, moderate (-15 to -9 dB) 280, strong (≥ -8 dB) 1,466.

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 RM3ZR in decoded directed-looking exchanges:

R7OQ · European Russia ×3 R9CS/P · Asiatic Russia ×3 RA9YTI · Asiatic Russia ×3 UA3FH · European Russia ×3 UA4FKT · European Russia ×3 UA4QK · European Russia ×3 RA4DAL · European Russia ×3 OM3SX · Slovak Republic ×2 R2GFD · European Russia ×2 R4SCB · European Russia ×2 R6ZCE · European Russia ×2 R8DX · Asiatic Russia ×2

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 RM3ZR

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: KO90 · 1,101 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,223 km (approx.)
Last such locator decoded: 2026-09-19 19:03 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	RM3ZR S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 19:02	160m	+3 / -	RJ9M	- / -	3	✓ Closing fragment
09-19 17:52	160m	0 / -	UN8DSW	- / -	2	Partial capture
09-19 17:50	160m	+2 / -	RD9T	- / -	2	Partial capture
09-19 17:49	160m	-2 / -	JA8DNV	- / -	2	Partial capture
09-19 17:45	160m	+1 / -18	DJ2TI	+13 / -3	12	✓ Full exchange observed
09-19 17:41	160m	-3 / -	R9HDU	- / -	3	Partial capture
09-19 17:32	160m	-2 / -	RY7F	- / -	6	Partial capture
09-19 17:30	160m	+2 / -	R6LKG	- / -13	3	✓ Closing fragment
09-19 17:26	160m	+1 / -	LX2A	- / -26	6	Partial capture
09-18 21:20	160m	+6 / -	RV9CD	- / -	2	Partial capture
09-17 19:52	160m	-3 / -	JA9NLE	- / -	2	Partial capture
09-17 19:44	160m	-4 / -	R0CBI	- / -10	5	✓ Closing fragment
09-17 16:42	160m	-10 / -	UB8CQC/P	- / -18	3	✓ Closing fragment
09-17 16:38	160m	-6 / -	UB8CQC/P	- / -	3	Partial capture
09-17 16:31	160m	-8 / -	UB8CQC/P	- / -	3	Partial capture
09-17 16:29	160m	-10 / -	<...>	- / -4	2	Partial capture
09-17 16:24	160m	-12 / +6	UF3T	-20 / +2	4	✓ Full exchange observed
09-17 16:23	160m	-12 / -	RN3TT	- / +5	2	✓ Closing fragment
09-17 16:16	160m	-11 / -	RD9U	- / -	2	Partial capture
09-17 15:57	40m	-5 / -	RT8T	- / -17	3	✓ Closing fragment
09-16 19:42	80m	-9 / -	RI1FJZ	- / -14	3	✓ Closing fragment
09-16 18:18	160m	-18 / -	RI1FJZ	- / -15	2	Partial capture
09-16 17:59	160m	-2 / -	RD9U	- / -	4	Partial capture
09-15 20:21	80m	-8 / -	RI1FJZ	- / -	5	Partial capture
09-15 19:10	80m	-10 / -	RI1FJZ	- / -	2	Partial capture
09-15 19:02	80m	+3 / -	RI1FJZ	- / -	2	Partial capture
09-14 16:45	160m	-4 / -	UA3ZQN	- / -	2	Partial capture
09-14 14:19	40m	-12 / -	RQ3D	- / -4	2	✓ Closing fragment
09-14 14:17	40m	-16 / -	RU9CZ	- / -8	2	✓ Closing fragment
09-14 14:12	40m	-5 / -	UN9LBC	- / -8	4	✓ Closing fragment
09-14 14:10	40m	-10 / -	BI6AN	- / -	2	Partial capture
09-13 20:24	40m	+11 / -	D2ACE	- / -	2	Partial capture
09-13 20:03	160m	+3 / -4	R2PT	-6 / -6	5	✓ Full exchange observed
09-13 20:03	160m	+6 / -8	SP9UPV	+15 / -7	5	✓ Full exchange observed
09-13 19:54	80m	+4 / -	UA9JTJ/9	- / -5	2	Partial capture
09-13 16:53	80m	+11 / -11	R9DZ	-13 / -3	7	✓ Full exchange observed
09-13 16:52	80m	+2 / -	R3BV	+6 / -9	3	✓ Closing observed
09-13 16:51	80m	+1 / -	JR1UTC	- / -	3	Partial capture
09-13 16:49	40m	+3 / -10	RL8C	-12 / -9	5	✓ Full exchange observed
09-13 16:46	40m	+4 / -	R9HFA	- / -15	5	✓ Closing fragment
09-13 16:43	40m	+2 / -9	RA6LO	+7 / -5	3	✓ Full exchange observed
09-13 16:42	40m	0 / +5	RC2Y	-3 / -	4	✓ Closing observed
09-13 16:41	40m	+2 / -1	UA9LKL	-8 / -14	5	✓ Full exchange observed
09-13 16:34	80m	-2 / -9	UB4CLH	-12 / -5	4	✓ Full exchange observed
09-13 16:32	80m	0 / -	UA4FKT	+10 / -	6	✓ Closing observed
09-13 16:29	80m	+3 / +1	R2AVW	-7 / -5	6	✓ Full exchange observed
09-13 16:28	80m	+2 / -5	RU9CZ	-10 / -6	3	✓ Full exchange observed
09-13 16:26	80m	+3 / +3	RV3IN	-4 / -4	5	✓ Full exchange observed
09-13 16:19	160m	-17 / -	RA0ADQ	- / -	2	Partial capture
09-13 15:36	160m	-17 / -1	RA3ZGT	-24 / +5	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
174715 +10  898  RM3ZR DJ2TI -18
174730  +4 2396  DJ2TI RM3ZR R-07
174745 +14  898  RM3ZR DJ2TI -18
174800  -1 2396  DJ2TI RM3ZR R-02
174815 +15  898  RM3ZR DJ2TI RR73
174830  +5 2396  DJ2TI RM3ZR 73
174900  -4 2396  JA8DNV RM3ZR KO90 (x2)
175030  +2 2396  RD9T RM3ZR KO90 (x2)
175215  +3 2396  UN8DSW RM3ZR KO90 (x2)
190245 +12 2353  RJ9M RM3ZR KO90 (x3)

40m

UTC    dB Audio  Message
141315  -1 2537  UN9LBC RM3ZR R-08 (x2)
141415  -3 2537  BI6AN RM3ZR KO90
141515  -8 2038  UN9LBC RM3ZR 73
141645 -14 1583  BI6AN RM3ZR KO90
141715 -15 1890  RU9CZ RM3ZR -08 (x2)
141845  +0 2710  RA4DAL RM3ZR 73
141915  -9 1890  RQ3D RM3ZR -04 (x2)
155630  -4 2472  UB8CQC/P RM3ZR KO90
155730  -4 1765  RT8T RM3ZR KO90 (x3)
155930  -7 1640  AG6X RM3ZR KO90

80m

UTC    dB Audio  Message
165200  +4 2292  JG7EVV RM3ZR KO90
190245  +6 2573  RI1FJZ RM3ZR KO90 (x14)

20m

UTC    dB Audio  Message
102145  +1 2189  RI1FJL RM3ZR KO90 (x3)

10m

UTC    dB Audio  Message
152815 -11 1852  CE4KM RM3ZR KO90 (x10)
153600  -4 1319  LW5ELI RM3ZR KO90 (x3)
153730  +0  495  EB5DFU RM3ZR R-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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