UA3RMB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO02

Receiver-side FT8 activity involving UA3RMB, decoded by SO8OO in southeastern Poland. 1,387 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 57 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-12.

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 1,387 FT8 messages attributed to UA3RMB as the transmitting token by decoded message structure across 57 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (55%), followed by 40 m (45%). Most decodes (65%) 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 (71%); the estimated median was -4 dB.

Overview

1,387

Messages attributed

UTC dates decoded

176

Active 15-min windows

-4 dB

Estimated median S/N

Bands

80m · 767 40m · 620

First attributed message: 2026-06-07
Last attributed message: 2026-10-12 17:50 UTC

Observed FT8 message patterns

Attributed sample: 1,387 messages
Active dates: 57 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -14 to +5.1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 101, moderate (-15 to -9 dB) 305, strong (≥ -8 dB) 981.

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 UA3RMB in decoded directed-looking exchanges:

TN8GD · Republic of the Congo ×2 DL9KM · Fed. Rep. of Germany ×2 IZ8PPI · Italy ×2 R50RKZ · European Russia ×2 TA3NK · Asiatic Turkey ×2 UA4NCX · European Russia ×2 R6CW · European Russia ×2 RA6ZD · European Russia ×2 SA0AQT · Sweden ×2 BD8ENX · China DK5DW · Fed. Rep. of Germany DL1EDR · Fed. Rep. of Germany

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 UA3RMB

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: LO02 · 842 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,363 km (approx.)
Last such locator decoded: 2026-10-12 17:50 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	UA3RMB S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-12 17:49	80m	-6 / -	DO9SAM	- / -	2	Partial capture
10-12 17:40	80m	-6 / -16	G4ZFJ	0 / -11	5	✓ Full exchange observed
10-12 17:36	80m	-18 / -	R9MBC	- / -19	2	✓ Closing fragment
10-12 17:09	80m	-9 / 0	SA0AQT	0 / -15	5	✓ Full exchange observed
10-12 17:04	80m	-9 / -	SA0AQT	- / -	5	Partial capture
10-11 15:03	40m	-14 / -	R1ZCL	- / -18	2	✓ Closing fragment
10-11 14:59	40m	-10 / -	R9FGJ	- / -5	2	✓ Closing fragment
10-11 14:57	40m	-12 / -17	OZ9FF	-14 / -	2	✓ Closing observed
10-11 04:32	40m	-18 / -	9H6C	- / -	5	Partial capture
10-11 04:29	40m	-16 / -18	OD5KU	-12 / -9	6	✓ Full exchange observed
10-10 17:49	80m	-2 / -6	R2OM	-22 / -	3	✓ Closing observed
10-10 17:27	40m	-9 / -	RU0LL/P	- / -24	5	✓ Closing fragment
10-09 20:05	80m	-5 / -	JN4MIV	- / -	3	Partial capture
10-09 20:04	80m	-4 / -	UC6D	-10 / -5	3	✓ Closing observed
10-09 20:01	80m	-4 / -	JA9NFO	- / -15	6	✓ Closing fragment
10-09 19:59	80m	-6 / -	OE9GWV	-24 / -12	3	✓ Closing observed
10-07 17:45	80m	-1 / -	A41KB	- / -18	13	Partial capture
10-05 17:36	80m	-2 / -8	HB9CUZ	+4 / -12	6	✓ Full exchange observed
10-05 17:33	80m	-5 / -8	PG7VG	-8 / -17	7	Partial capture
10-05 17:32	80m	-4 / -5	DB4VI	-8 / -17	5	✓ Full exchange observed
10-05 17:30	80m	-4 / -	DK2BK	- / -19	2	Partial capture
10-05 17:28	80m	-5 / -4	SP8WB	+12 / -3	5	✓ Full exchange observed
10-05 17:26	80m	-8 / -10	OZ1A	+6 / -2	4	✓ Full exchange observed
10-05 17:25	80m	-14 / -	DL9NCR	- / -	2	Partial capture
10-05 17:23	80m	-6 / -15	DO8JB	-13 / -15	5	✓ Full exchange observed
10-05 17:22	80m	-3 / -7	DO1TLP	0 / -11	5	✓ Full exchange observed
10-05 17:18	80m	-11 / +4	RD3AD	-12 / -4	4	✓ Full exchange observed
10-05 17:17	80m	-8 / -4	II5GG	-2 / -7	5	✓ Full exchange observed
10-05 17:14	80m	-5 / -8	SP5DFK/QRP	0 / -5	4	Partial capture
10-05 02:12	80m	- / -9	RN2F	+4 / -	2	✓ Closing fragment
10-05 02:10	80m	-2 / -5	SX2LGT	0 / -8	5	✓ Full exchange observed
10-04 16:59	80m	-9 / -	YO6BLU	- / -	3	Partial capture
10-04 16:39	40m	-12 / -8	ON4AEO	+3 / -10	4	✓ Full exchange observed
10-04 16:34	40m	-8 / -	EU6UE	- / -12	2	✓ Closing fragment
09-20 18:12	40m	+3 / -	PD0RCQ	- / -	5	Partial capture
09-20 17:01	80m	-2 / -10	SM5VSS	+2 / -	4	✓ Closing observed
09-20 16:59	80m	-4 / -	E70SZ	- / -	2	Partial capture
09-20 16:57	80m	+4 / +2	RZ6ALZ	+3 / 0	5	✓ Full exchange observed
09-20 16:56	80m	-2 / -	R9SCJ	- / -15	2	✓ Closing fragment
09-20 16:55	80m	- / -	DK3WL	0 / -	3	Partial capture
09-20 16:55	80m	+1 / +4	RV3DLV	+4 / +3	5	✓ Full exchange observed
09-20 16:52	80m	+2 / 0	RW4LMR	-16 / 0	4	✓ Full exchange observed
09-20 16:52	80m	+3 / 0	R6FMK	0 / -7	4	✓ Full exchange observed
09-19 18:45	80m	+7 / -	DO2KMB	-1 / -18	4	✓ Closing observed
09-19 18:19	80m	- / -	R3RRC/P	0 / -	2	Partial capture
09-18 17:37	80m	-6 / -	ZL2NU	- / -	8	Partial capture
09-18 03:51	80m	- / -15	EW6TW	+4 / -	2	✓ Closing fragment
09-18 03:47	80m	-18 / -9	HF100PKP	+4 / -	4	Partial capture
09-18 03:38	80m	-14 / -	HF100PKP	- / -	4	Partial capture
09-18 03:27	80m	- / -	F6AOJ	+10 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
173730 -10 2116  CQ UA3RMB LO02 (x2)
173915 -21 2116  UA3RMB R6ZAJ KN98
174015  +0 2487  UA3RMB G4ZFJ JO01
174030  -6 2115  G4ZFJ UA3RMB -11
174045  +0 2487  UA3RMB G4ZFJ R-16
174100  -5 2115  G4ZFJ UA3RMB RR73
174115  +1 2488  UA3RMB G4ZFJ 73
174200  -4 2115  CQ UA3RMB LO02 (x5)
174945  -9  699  DO9SAM UA3RMB LO02 (x2)

40m

UTC    dB Audio  Message
043100 -21 1740  OD5KU UA3RMB 73
043215 -16 1740  9H6C UA3RMB LO02 (x5)
043715 -24 1738  DL/AD2LX UA3RMB LO02
044100 -20 2084  HB0CC UA3RMB LO02
145745 -14 2316  UA3RMB OZ9FF -17
145830 -12 2209  OZ9FF UA3RMB 73
145900 -10 2209  R9FGJ UA3RMB -05 (x2)
150200 -13 2207  JW9DL UA3RMB LO02
150300 -13 2208  R1ZCL UA3RMB R-18 (x2)

20m

UTC    dB Audio  Message
033430 -16  857  UA3RMB TN8GD RR73

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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