R4UAS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO85

Receiver-side FT8 activity involving R4UAS, decoded by SO8OO in southeastern Poland. 962 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 53 UTC dates in the available aggregate history. Observed between 2026-06-09 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 962 FT8 messages attributed to R4UAS as the transmitting token by decoded message structure across 53 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (97%), followed by 20 m (3%). Most decodes (80%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

962

Messages attributed

UTC dates decoded

192

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 936 20m · 26

First attributed message: 2026-06-09
Last attributed message: 2026-09-19 18:58 UTC

Observed FT8 message patterns

Attributed sample: 962 messages
Active dates: 53 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -16 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 99, moderate (-15 to -9 dB) 397, strong (≥ -8 dB) 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 R4UAS in decoded directed-looking exchanges:

UA4FKT · European Russia ×3 GJ0KYZ · Jersey ×2 RN9N · Asiatic Russia ×2 M9PCA · England ×2 R2ZCA · European Russia ×2 RA3RFT · European Russia ×2 RA3THN · European Russia ×2 RA3ZOM · European Russia ×2 RC6OD · European Russia ×2 UA3YPS · European Russia ×2 9A1IST · Croatia BA3NZ · China

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 R4UAS

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: KO85 · 540 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,193 km (approx.)
Last such locator decoded: 2026-09-19 18:58 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	R4UAS S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 18:54	40m	-2 / -	RA1AGK	- / -	2	Partial capture
09-19 18:52	40m	-4 / -	UA9KBC	- / -	2	✓ Closing fragment
09-19 18:49	40m	-6 / -4	UF4S	+10 / -	4	✓ Closing observed
09-19 16:09	40m	-11 / -5	RV3ID	-4 / -1	5	✓ Full exchange observed
09-19 16:07	40m	-12 / -	RV6MX	-8 / -	4	✓ Closing observed
09-19 16:04	40m	-8 / -4	RA2FGK	-12 / -10	4	✓ Full exchange observed
09-19 16:01	40m	-2 / -	RZ0SW	- / -24	5	✓ Closing fragment
09-19 16:00	40m	-2 / -12	UB4CJS	-2 / -6	4	✓ Full exchange observed
09-19 15:58	40m	-4 / -	UA6LTA	- / -4	3	✓ Closing fragment
09-19 15:15	40m	-12 / -15	UA9LAO	-6 / -5	4	✓ Full exchange observed
09-19 12:54	40m	-14 / -12	EU2ABK	-9 / -	3	✓ Closing observed
09-18 21:02	40m	-6 / -	JI4JKO	- / -	2	Partial capture
09-18 17:06	40m	- / -10	UB2FEK	-8 / -	2	✓ Closing fragment
09-18 17:01	40m	- / -8	RN3TT	-6 / -	2	✓ Closing fragment
09-18 13:28	40m	- / +6	EU6KA	-10 / -	2	✓ Closing fragment
09-17 16:31	40m	-13 / -3	EW6DM	-2 / -	3	✓ Closing observed
09-17 16:28	40m	- / -4	R6UBM	-2 / -	2	✓ Closing fragment
09-17 16:24	40m	0 / -	RY3QAB	- / -	2	Partial capture
09-17 16:22	40m	-5 / -	R6FMM	-10 / -14	2	✓ Closing observed
09-17 16:17	40m	-14 / -	R3YAR	+6 / -	2	✓ Closing observed
09-17 16:16	40m	-11 / -	RW1CL	-14 / +3	4	✓ Closing observed
09-17 16:15	40m	-8 / -	RK9S	- / -	2	Partial capture
09-17 16:12	40m	0 / -	RA0ADQ	- / -	2	Partial capture
09-15 17:16	40m	-4 / -	RT8T	-15 / -13	4	✓ Closing observed
09-15 17:14	40m	-12 / -9	RA6LHU	0 / -14	5	✓ Full exchange observed
09-13 16:26	40m	- / -2	UF6V/UA5D	-14 / -	3	Partial capture
09-13 16:23	40m	-14 / -	R7LB	- / -9	2	✓ Closing fragment
09-13 16:22	40m	-9 / -	UB1ATR	- / -9	3	✓ Closing fragment
09-13 16:01	40m	-6 / -	R70SAB	- / -12	4	Partial capture
09-13 15:59	40m	-8 / -	YO3FVR/P	- / -4	2	Partial capture
09-11 16:34	40m	-7 / -3	RA6OD	+7 / -	3	✓ Closing observed
09-11 16:32	40m	-5 / -	R4HJN	-13 / -6	4	✓ Closing observed
09-11 16:30	40m	-6 / -16	R7KM	+11 / -15	3	Partial capture
09-11 16:30	40m	-4 / -	RW9UR	- / -	2	Partial capture
09-11 16:29	40m	-7 / -	RU9CK	- / -9	3	✓ Closing fragment
09-10 17:02	40m	-2 / -	EW4TT	- / -8	3	✓ Closing fragment
09-10 16:57	40m	-2 / -	RA2FCF	- / -20	3	✓ Closing fragment
09-10 16:09	40m	- / -13	RQ6K	-4 / -	2	Partial capture
09-10 16:02	40m	-20 / -	RA9HBQ	- / -16	2	Partial capture
09-08 16:17	40m	- / +4	OM3DX	-17 / -	2	✓ Closing fragment
09-08 16:12	40m	- / -17	R5AK	+1 / -	2	✓ Closing fragment
09-08 16:10	40m	-11 / -	R4HNW	- / -	2	Partial capture
09-08 16:09	40m	-10 / -20	M9PCA	-6 / -16	4	✓ Full exchange observed
09-08 16:05	40m	-10 / -12	R4CBE	-3 / -3	5	✓ Full exchange observed
09-08 16:04	40m	-10 / -14	RA3BL	+4 / -2	5	✓ Full exchange observed
09-08 16:01	40m	-11 / -6	RC7KH	-10 / -4	4	✓ Full exchange observed
09-07 20:18	40m	0 / -	RN6HCA	- / -13	4	✓ Closing fragment
09-07 17:48	40m	-9 / -5	R6OAQ	+2 / -8	4	✓ Full exchange observed
09-07 17:43	40m	- / -9	R6FIV	-10 / -	2	Partial capture
09-07 17:35	40m	-7 / -	R3GI	+5 / -2	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
160830 -12 2214  RV6MX R4UAS 73
160900 -14 2214  RV3ID R4UAS KO85
161015  -5 1589  R4UAS RV3ID -05
161030 -14 2251  RV3ID R4UAS R-01
161045  -4 1589  R4UAS RV3ID RR73
161100  -6 2252  RV3ID R4UAS 73
184915  -8 2691  UF4S R4UAS KO85 (x2)
185100 +11 1250  R4UAS UF4S -04 (x2)
185230  -6 2750  UA9KBC R4UAS KO85 (x2)
185400  -3 2750  RA1AGK R4UAS KO85 (x2)
185830 -15 2226  JF2JRD R4UAS KO85

20m

UTC    dB Audio  Message
175000  +3  317  R4UAS T77RN -15
202815  +9  826  R4UAS TA4DX -01 (x2)
170300  -3 2750  YB6XFI R4UAS KO85 (x2)
170415  +3 2750  CN8NS R4UAS KO85 (x2)
174515  +6 2578  TA7AO R4UAS KO85 (x4)
174800  +1 2322  G4DBW R4UAS KO85
174815  +1 2244  R4UAS G4DBW -15
174830  +0 2322  G4DBW R4UAS R-11
174845  -1 2244  R4UAS G4DBW RR73

60m

UTC    dB Audio  Message
211000  -7 1899  R4UAS DK7ZT -14 (x2)

10m

UTC    dB Audio  Message
080415 -20 1116  R4UAS RX3ASQ KO95
081800 -14 1360  R4UAS R6MO -08 (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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