RU3SD — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO94

Receiver-side FT8 activity involving RU3SD, decoded by SO8OO in southeastern Poland. 2,940 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 86 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-06.

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 2,940 FT8 messages attributed to RU3SD as the transmitting token by decoded message structure across 86 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (36%), followed by 160 m (31%) and 10 m (16%). Most decodes (55%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (66%); the estimated median was -4.5 dB.

Overview

2,940

Messages attributed

UTC dates decoded

416

Active 15-min windows

-4.5 dB

Estimated median S/N

Bands

160m · 912 80m · 349 40m · 172 20m · 1,049 10m · 458

First attributed message: 2026-06-06
Last attributed message: 2026-11-06 05:36 UTC

Observed FT8 message patterns

Attributed sample: 2,940 messages
Active dates: 86 UTC dates
Estimated median S/N: -4.5 dB
Estimated 10th-90th percentile: -16 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 313, moderate (-15 to -9 dB) 690, strong (≥ -8 dB) 1,937.

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 RU3SD in decoded directed-looking exchanges:

RA3VX · European Russia ×3 R1NO · European Russia ×2 R4WQ · European Russia ×2 R6ML · European Russia ×2 R7HL · European Russia ×2 RC9WC · Asiatic Russia ×2 RI1FJL · Franz Josef Land ×2 RI1FJZ · Franz Josef Land ×2 RM5F · European Russia ×2 5Z4VJ · Kenya 7P8GE · Lesotho 7X2TT · Algeria

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 RU3SD

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: KO94 · 2,065 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,273 km (approx.)
Last such locator decoded: 2026-11-06 05:36 UTC

Other locator fields attributed to this token: KO04 (3) and KO84 (2).

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	RU3SD S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 05:35	40m	-12 / -	N8NN	- / -	2	Partial capture
11-06 05:29	40m	0 / -	AD5YB	- / -24	5	✓ Closing fragment
11-06 05:26	40m	-6 / -	N5RJR	- / -14	3	✓ Closing fragment
11-01 19:35	160m	+5 / -	JM1JZN	- / -16	2	✓ Closing fragment
11-01 19:34	160m	+5 / -2	IK6QOP	-5 / -	7	✓ Closing observed
11-01 19:32	160m	+2 / -	OH0KCE	- / -	3	Partial capture
11-01 19:15	160m	+2 / -	OH0KCE	- / -24	10	Partial capture
11-01 04:31	40m	-10 / -	CX2RA	- / -	3	Partial capture
11-01 01:19	160m	-2 / -	6W/IK2HKT	- / -	46	Partial capture
11-01 01:17	160m	0 / -	WW2N	- / -	3	Partial capture
11-01 01:15	160m	+9 / -	NB2P	- / -	3	Partial capture
11-01 00:41	160m	+1 / -	6W/IK2HKT	- / -17	53	Partial capture
11-01 00:38	160m	+9 / -	LZ1ZF	-13 / -8	3	Partial capture
11-01 00:07	160m	-1 / -	6W/IK2HKT	- / -	50	Partial capture
10-31 23:09	160m	-3 / -	6W/IK2HKT	- / -	10	Partial capture
10-31 22:15	160m	-1 / -	6W/IK2HKT	- / -	84	Partial capture
10-31 21:42	160m	-1 / -	6W/IK2HKT	- / -	36	Partial capture
10-31 20:41	80m	- / +7	OE1RDU/3	+9 / -	2	Partial capture
10-31 20:40	80m	-2 / -	PY6HD	- / -20	2	✓ Closing fragment
10-31 20:17	80m	+12 / -	JA0EKI	- / -13	5	✓ Closing fragment
10-31 19:36	40m	- / -4	7X2RF	0 / -	2	✓ Closing fragment
10-31 19:07	40m	- / -1	IA5ITY	+6 / -	2	Partial capture
10-31 18:41	40m	-16 / -	EY7BP	- / -11	2	Partial capture
10-31 18:38	40m	-20 / -	DS1VCR	- / -	4	Partial capture
10-31 18:30	40m	-2 / -	UT/WE9G	- / -16	2	Partial capture
10-30 22:21	160m	-14 / -	6W/IK2HKT	- / -	2	Partial capture
10-30 22:07	160m	-16 / -	6W/IK2HKT	- / -	12	Partial capture
10-30 21:08	160m	-20 / -	6W/IK2HKT	- / -	6	Partial capture
10-30 19:56	80m	-8 / -10	DD0IPA	-4 / -16	4	✓ Full exchange observed
10-30 19:44	80m	-2 / -	ES0MVM	- / -14	2	✓ Closing fragment
10-30 19:37	80m	+3 / -	EY7BP	- / -6	3	✓ Closing fragment
10-30 19:35	80m	-3 / -	BI3UPU	- / -10	2	✓ Closing fragment
10-30 19:34	80m	+2 / -	BA6IM	- / -14	2	Partial capture
10-30 19:31	80m	+2 / -	<...>	- / -26	4	Partial capture
10-30 13:12	40m	+3 / -	DS1VAA	- / -17	3	✓ Closing fragment
10-30 13:03	40m	-4 / -	K9OW	- / -	2	Partial capture
10-30 12:59	40m	+1 / -	BD4QXR	- / -14	3	✓ Closing fragment
10-30 12:57	40m	-10 / -	6K2GII	- / -13	3	✓ Closing fragment
10-30 12:55	40m	-14 / -	KJ5IEL	- / -	2	Partial capture
10-30 04:06	160m	-12 / -	RA6MQ/P	- / -	2	Partial capture
10-30 03:55	160m	-2 / -	RA6MQ/P	- / -	2	Partial capture
10-30 03:49	160m	-6 / -	RA6MQ/P	- / -	3	Partial capture
10-30 03:37	160m	-2 / -	RA6MQ/P	- / -	2	Partial capture
10-30 03:30	160m	-11 / -	RA6MQ/P	- / -	3	Partial capture
10-30 03:11	160m	-4 / -	RA6MQ/P	- / -	14	Partial capture
10-30 03:10	160m	-14 / -	6W/IK2HKT	- / -	2	Partial capture
10-30 03:02	160m	-15 / -3	SV4FFK	-15 / -	5	Partial capture
10-30 02:37	160m	-8 / -	6W/IK2HKT	- / -	51	Partial capture
10-30 02:01	160m	-10 / -	RA6MQ/P	- / -	24	Partial capture
10-30 01:43	160m	-5 / -	RA6MQ/P	- / -	22	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
193830  -3 2631  RU3SD TC0TR +01
043145 -12 2542  CX2RA RU3SD KO94 (x3)
052645  -7 2693  N5RJR RU3SD KO94 (x3)
052830 -15 1017  RU3SD UB3DQR KO85
052915  -4  784  AD5YB RU3SD R-24 (x5)
053545 -11 2878  N8NN RU3SD KO94 (x2)

160m

UTC    dB Audio  Message
192045  -9 1880  RU3SD R6FFB LN14
192100  +5 1113  OH0KCE RU3SD KO94 (x5)
193415 -18 1959  RU3SD IK6QOP JN62 (x2)
193500  +5 1602  JM1JZN RU3SD -16
193515  -5 1959  RU3SD IK6QOP JN62
193530  +5 1602  JM1JZN RU3SD RR73
193545  +5 1959  RU3SD IK6QOP JN62 (x2)
193630  +5 1602  IK6QOP RU3SD RR73
193645  +2 1959  RU3SD IK6QOP 73

80m

UTC    dB Audio  Message
194430  -3 1331  ES0MVM RU3SD R-14 (x2)
195645  -6 1791  DD0IPA RU3SD KO94
195700  -4 1791  RU3SD DD0IPA -10
195715 -10 1791  DD0IPA RU3SD R-16 (x2)
201745 +16 3022  JA0EKI RU3SD KO94 (x5)
204045  -1 1757  PY6HD RU3SD R-20 (x2)
204130 +10  461  RU3SD OE1RDU/3 +07 (x2)

10m

UTC    dB Audio  Message
102845  -4  496  RU3SD <...> -08

20m

UTC    dB Audio  Message
045900  +3 2419  KT7T RU3SD R-17
050500 -14 1826  AI6NJ RU3SD KO94
075330  +9 2511  KF5VDX RU3SD KO94
075830  +0 2339  KD4DC RU3SD KO94 (x4)
042830 -18 2425  AH6WP RU3SD KO94 (x8)

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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