RD4AI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LN28

Receiver-side FT8 activity involving RD4AI, decoded by SO8OO in southeastern Poland. 76 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-09-07 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 76 FT8 messages attributed to RD4AI as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (82%), followed by 40 m (18%). Most decodes (100%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 62 40m · 14

First attributed message: 2026-09-07
Last attributed message: 2026-09-19 21:02 UTC

Observed FT8 message patterns

Attributed sample: 76 messages
Active dates: 6 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -19 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 39, strong (≥ -8 dB) 9.

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 RD4AI in decoded directed-looking exchanges:

R1CF · European Russia R1QF · European Russia R2EA · European Russia R2PA · European Russia RA6OD · European Russia UA4CKN · European Russia 5P1KZX · Denmark EU1AFX · Belarus OK1SI · Czech Republic R4HHN · European Russia R4NBV · European Russia R5AV · European Russia

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 RD4AI

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: LN28 · 36 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,686 km (approx.)
Last such locator decoded: 2026-09-19 20:44 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	RD4AI S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 20:59	80m	-16 / -	R3XBS	- / -4	5	Partial capture
09-19 20:58	80m	- / -	RM5F	0 / -	2	Partial capture
09-19 20:56	80m	- / -11	R3XBS	0 / -	2	Partial capture
09-19 20:56	80m	-14 / -5	RN7T	+4 / +6	5	✓ Full exchange observed
09-19 20:52	80m	-16 / -	R4HHN	- / -6	3	✓ Closing fragment
09-19 20:47	80m	- / -12	EU1AFX	+5 / -	2	✓ Closing fragment
09-19 20:46	80m	-20 / -	RA3YDA	+2 / -7	3	Partial capture
09-19 20:44	80m	- / -19	R4NBV	-2 / -	4	✓ Closing fragment
09-19 20:33	80m	- / -	SV1DKR	-6 / -	2	Partial capture
09-19 20:30	80m	- / -8	RY3F	-2 / -	2	✓ Closing fragment
09-13 17:18	40m	- / -	R7DX	-5 / -	4	Partial capture
09-13 17:12	40m	- / -	R1CF	-4 / -	3	Partial capture
09-13 17:10	40m	- / -10	R6AC	-12 / -	2	Partial capture
09-13 17:09	40m	-7 / -	R1QF	-17 / -4	3	✓ Closing observed
09-13 17:08	40m	-10 / -10	R2PA	-1 / +3	3	✓ Full exchange observed
09-13 17:05	40m	- / -	RN3OX	-2 / -	8	Partial capture
09-13 17:03	40m	- / -	R8CW	-7 / -	3	Partial capture
09-13 17:01	40m	- / -	EW8CW	-1 / -	2	Partial capture
09-13 17:00	40m	-11 / -11	R2EA	+5 / -	6	✓ Closing observed
09-10 21:34	80m	- / -	5P1KZX	+17 / -	2	✓ Closing fragment
09-10 21:30	80m	- / -13	DK7ZT	+8 / -	5	Partial capture
09-10 21:29	80m	-10 / -6	RA3TVW	-9 / -1	7	✓ Full exchange observed
09-10 21:28	80m	- / -16	OK1SI	+14 / -	3	✓ Closing fragment
09-10 21:28	80m	-8 / -16	5P1KZX	+10 / -	10	Partial capture
09-10 21:26	80m	-8 / -	OK1SI	- / -	2	Partial capture
09-10 21:23	80m	-8 / -6	RT6Z	+6 / -	3	✓ Closing observed
09-10 21:14	80m	-15 / -19	DK7ZT	-4 / -12	4	Partial capture
09-10 21:14	80m	- / -18	UA9LT	-11 / -	3	Partial capture
09-10 21:13	80m	-16 / -	SV9MBH	- / -	2	✓ Closing fragment
09-10 21:06	80m	-16 / -5	RK4FH	-6 / -	3	Partial capture
09-10 21:00	80m	- / -14	R6ODX	-10 / -	2	Partial capture
09-10 20:52	80m	- / -6	R6ODX	+3 / -	2	Partial capture
09-10 20:47	80m	- / -17	RL3K	-15 / -	2	✓ Closing fragment
09-10 20:42	80m	- / -11	R6ODX	+2 / -	2	Partial capture
09-10 20:17	80m	- / +2	UA3SCU	-7 / -	3	Partial capture
09-09 20:54	40m	- / +2	DK7ZT	-8 / -	2	Partial capture
09-09 20:54	40m	-15 / -13	F5RRS	-3 / -12	6	Partial capture
09-09 20:42	40m	- / -14	F4BYA	+4 / -	4	Partial capture
09-09 20:41	40m	- / -8	DK7ZT	0 / -	4	Partial capture
09-08 22:15	80m	- / -	R5BM	-6 / -	2	Partial capture
09-08 22:15	80m	- / -	9A4ZM	+9 / -	2	Partial capture
09-08 22:09	80m	- / -	DG5PW	-10 / -	2	Partial capture
09-08 22:09	80m	-16 / -	DL1EDR	+4 / -15	4	Partial capture
09-08 22:06	80m	- / -	RL3K	-13 / -	3	Partial capture
09-08 22:03	80m	-20 / -11	R7DX	+10 / +5	5	✓ Full exchange observed
09-08 22:02	80m	- / -20	DO1OAS	-8 / -	5	Partial capture
09-08 21:58	80m	-14 / -5	RL3K	-8 / -16	11	Partial capture
09-08 21:55	80m	-16 / -	RZ9O	- / -15	2	Partial capture
09-08 21:53	80m	-17 / -1	RA4CGX	-3 / -	5	✓ Closing observed
09-08 21:50	80m	- / -20	DO1OAS	-1 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
205500  -3 1640  RD4AI RM5F KO85
205630  +1 1032  RD4AI RN7T LN05
205630  -7 2134  RD4AI R3XBS -11 (x2)
205745 -18 1810  RN7T RD4AI +06
205800  +8  983  RD4AI RN7T R-05
205815 -12 1809  RN7T RD4AI RR73
205830  -3 1641  RD4AI RM5F KO85
205845 -13 1809  RN7T RD4AI RR73
205900  +3 1641  RD4AI RM5F KO85
205915 -14 1810  R3XBS RD4AI R-04 (x5)

40m

UTC    dB Audio  Message
171000 -10 1241  R2PA RD4AI R+03
171015 -10 1921  RD4AI R6AC LN05
171045  +1 2182  RD4AI R2PA RR73
171145 -14 1919  RD4AI R6AC R-10
171245  -2  694  RD4AI R1CF KO59
171315 -10  742  RD4AI UA4CKN RR73
171315  -6  694  RD4AI R1CF KO59 (x2)
171830 -18 1243  R1CF RD4AI RR73
171845  -1 1640  RD4AI R7DX KN84 (x4)
172300 -11 1244  RA6OD RD4AI 73
172345 -13  796  RD4AI R8CW MO06

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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