RU3ACA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO86

Receiver-side FT8 activity involving RU3ACA, decoded by SO8OO in southeastern Poland. 573 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 14 UTC dates in the available aggregate history. Observed between 2026-09-01 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 573 FT8 messages attributed to RU3ACA as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (39%), followed by 160 m (31%) and 80 m (30%). Most decodes (70%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (70%); the estimated median was -3 dB.

Overview

573

Messages attributed

UTC dates decoded

105

Active 15-min windows

-3 dB

Estimated median S/N

Bands

160m · 178 80m · 170 40m · 225

First attributed message: 2026-09-01
Last attributed message: 2026-09-20 03:06 UTC

Observed FT8 message patterns

Attributed sample: 573 messages
Active dates: 14 UTC dates
Estimated median S/N: -3 dB
Estimated 10th-90th percentile: -15 to +10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 52, moderate (-15 to -9 dB) 121, strong (≥ -8 dB) 400.

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 RU3ACA in decoded directed-looking exchanges:

HA7TM · Hungary ×2 LY2BNL · Lithuania ×2 R2EA · European Russia ×2 R3PLA · European Russia ×2 R5AV · European Russia ×2 RA9YTI · Asiatic Russia ×2 RK6OV · European Russia ×2 RN3TT · European Russia ×2 RW9WJ · Asiatic Russia ×2 RY3D · European Russia ×2 SV2AEL · Greece ×2 JH5LCN · Japan ×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 RU3ACA

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: KO86 · 50 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,244 km (approx.)
Last such locator decoded: 2026-09-20 02:43 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	RU3ACA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 02:54	40m	+8 / -	KC2OUV	- / -17	2	✓ Closing fragment
09-20 02:48	40m	+8 / -	LU9GDN	- / -24	2	Partial capture
09-20 02:43	40m	+10 / +3	R8CKD	-12 / -7	5	✓ Full exchange observed
09-20 02:43	40m	+12 / -15	RY3F	+9 / -18	5	Partial capture
09-20 02:43	40m	+11 / -7	UA9SY	-12 / -2	6	✓ Full exchange observed
09-20 02:33	40m	+12 / -	TN8GD	- / -13	3	✓ Closing fragment
09-20 02:24	80m	+12 / -	HI8R	- / -12	3	Partial capture
09-20 02:22	80m	+8 / +1	R4FDD	+8 / 0	4	✓ Full exchange observed
09-20 02:20	80m	+11 / -	4X1UF	- / -14	3	✓ Closing fragment
09-20 02:11	80m	+11 / -	DL9KM	-4 / -8	8	Partial capture
09-20 02:11	80m	+12 / -	EA1IOK	-4 / -10	8	Partial capture
09-20 02:11	80m	+16 / -6	IK4TVP	+5 / -3	5	✓ Full exchange observed
09-20 02:10	80m	+12 / -3	MI0NWA	-2 / -12	3	✓ Full exchange observed
09-20 01:59	80m	-1 / -	HI8R	- / -6	2	Partial capture
09-20 01:55	160m	-2 / +4	UA1OMS	-1 / +2	4	✓ Full exchange observed
09-19 19:08	160m	-6 / -	RI1FJZ	- / -13	3	Partial capture
09-19 19:07	160m	-8 / -15	SV9GPV	-8 / -17	4	✓ Full exchange observed
09-19 18:29	80m	+8 / -13	HB9DGZ	-5 / -14	3	✓ Full exchange observed
09-19 18:24	80m	- / -2	UA4FEN	-10 / -	2	Partial capture
09-19 18:23	80m	-4 / +5	RY3F	-8 / -	3	✓ Closing observed
09-19 18:22	80m	- / -20	4L6EZ	-4 / -	2	Partial capture
09-19 15:36	40m	+4 / -3	UB4CJS	-5 / -	6	✓ Closing observed
09-19 15:32	40m	+6 / -	R6DVV	-9 / -4	5	✓ Closing observed
09-19 15:32	40m	- / +2	UA3SID	+1 / -	3	✓ Closing fragment
09-19 15:28	40m	- / -2	RM5F	+1 / -	3	✓ Closing fragment
09-18 21:01	80m	-1 / -6	YL3NU	-5 / -	2	✓ Closing observed
09-18 20:38	160m	-8 / -9	HA7TM	+23 / -2	8	✓ Full exchange observed
09-18 20:29	160m	-7 / -26	UA4CKN	-17 / -4	5	✓ Full exchange observed
09-18 19:04	40m	+1 / -	SQ9BDB	- / -19	3	Partial capture
09-18 18:53	160m	-10 / -5	RA3XDX	-4 / -2	4	✓ Full exchange observed
09-18 17:01	160m	-12 / -21	RK6MC	-4 / -	5	✓ Closing observed
09-18 16:58	160m	-11 / -	R9TS	- / -15	2	✓ Closing fragment
09-18 16:56	160m	-12 / -6	RA3YDA	-12 / -	4	✓ Closing observed
09-18 16:55	160m	-11 / -	RZ6BS	-9 / -18	6	Partial capture
09-18 16:46	80m	+2 / -	RA0AM	- / -22	2	Partial capture
09-18 16:42	80m	- / -	RK6MC	+6 / -	2	Partial capture
09-18 16:39	80m	+2 / -	R3UG	- / -1	2	✓ Closing fragment
09-18 16:38	80m	+4 / -	RX3DQ	-8 / +2	3	✓ Closing observed
09-18 16:38	80m	-1 / -	4X1UF	- / -	2	✓ Closing fragment
09-13 05:17	40m	-4 / -	RW9WJ	- / -9	2	✓ Closing fragment
09-13 05:16	40m	-11 / -	UA3LRN	-11 / -5	4	✓ Closing observed
09-13 05:15	40m	-13 / -1	YO6LM	+15 / -	4	✓ Closing observed
09-13 05:03	40m	-14 / -	R2GBR	- / -2	2	✓ Closing fragment
09-13 05:00	40m	-14 / -	R9FDM	- / +1	2	✓ Closing fragment
09-13 04:54	40m	-12 / -	ZL1OGX	- / -17	2	✓ Closing fragment
09-13 04:28	40m	- / -	IU8RFW	-9 / -	5	Partial capture
09-13 04:24	40m	0 / -3	RK6OV	-5 / -	4	✓ Closing observed
09-13 04:23	40m	-2 / -	UB4HPQ	- / -14	2	✓ Closing fragment
09-13 04:21	40m	-6 / +5	UA3WG	-3 / -3	5	✓ Full exchange observed
09-12 21:43	160m	-24 / -	RA9YTI	-21 / -4	2	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
024445 +10  777  RU3ACA RY3F -13
024445 -13  485  RU3ACA R8CKD 73
024500 +10  777  UA9SY RU3ACA -02
024515 -11 2491  RU3ACA UA9SY R-07
024530 +12  777  UA9SY RU3ACA RR73
024545 -11 2491  RU3ACA UA9SY 73
024600 +12  777  RY3F RU3ACA R-18 (x2)
024830 +10  777  LU9GDN RU3ACA -24 (x2)
025115 +11  777  EP2AES RU3ACA RR73
025400  +5  777  KC2OUV RU3ACA -17 (x2)
025730  +0  777  NP3MR RU3ACA -15
030600 +11  777  HK3AB RU3ACA -14

80m

UTC    dB Audio  Message
021400  -6 2118  RU3ACA DL9KM JN68
021415 +11  740  EA1IOK RU3ACA -09
021430  -5 2118  RU3ACA DL9KM JN68
021445 +11  740  DL9KM RU3ACA -08
021900 +14  741  HI8R RU3ACA -10
022045 +12  741  4X1UF RU3ACA -14 (x3)
022200  +9  742  RU3ACA R4FDD +01
022215  +7  741  R4FDD RU3ACA R+00
022230  +7  743  RU3ACA R4FDD RR73
022245  +9  741  R4FDD RU3ACA 73
022400 +11  741  HI8R RU3ACA -12 (x3)

160m

UTC    dB Audio  Message
204045 +21  736  RU3ACA HA7TM 73
190700 -10  735  SV9GPV RU3ACA -17
190745  -7 1151  RU3ACA SV9GPV R-15
190800  -5  735  SV9GPV RU3ACA RR73
190815  -8 1151  RU3ACA SV9GPV 73
190845 -11  735  RI1FJZ RU3ACA -13 (x4)
192345 -14  737  R4NBV RU3ACA -13
193445 -16  734  UW5ZM RU3ACA +02
015530  -4  736  UA1OMS RU3ACA +02
015545  +0 1894  RU3ACA UA1OMS R+04
015600  +1  735  UA1OMS RU3ACA RR73
015615  -2 1894  RU3ACA UA1OMS 73

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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