R2DDA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: KO96

Receiver-side FT8 activity involving R2DDA, decoded by SO8OO in southeastern Poland. 518 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 24 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-09-12.

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 518 FT8 messages attributed to R2DDA as the transmitting token by decoded message structure across 24 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (68%), followed by 80 m (27%) and 20 m (5%). Most decodes (93%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8.9 dB.

Overview

518

Messages attributed

UTC dates decoded

Active 15-min windows

-8.9 dB

Estimated median S/N

Bands

80m · 141 40m · 352 20m · 25

First attributed message: 2026-06-14
Last attributed message: 2026-09-12 19:26 UTC

Observed FT8 message patterns

Attributed sample: 518 messages
Active dates: 24 UTC dates
Estimated median S/N: -8.9 dB
Estimated 10th-90th percentile: -17 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 82, moderate (-15 to -9 dB) 179, strong (≥ -8 dB) 257.

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 R2DDA in decoded directed-looking exchanges:

IK4LZH · Italy ×2 OK5DN/P · Czech Republic ×2 UB3AMO · European Russia ×2 YO4LUP · Romania ×2 RL7Z · European Russia ×2 8S2A · Sweden 9A9N · Croatia DJ0MAB · Fed. Rep. of Germany DL8LE · Fed. Rep. of Germany DS5USH · Republic of Korea E20EHQ · Thailand E75CC · Bosnia-Herzegovina

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 R2DDA

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: KO96 · 85 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,353 km (approx.)
Last such locator decoded: 2026-09-12 19:07 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	R2DDA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 19:24	40m	+3 / -9	SQ4INW	-8 / -	3	✓ Closing observed
09-12 19:22	40m	-6 / -	CN8NS	- / -20	3	Partial capture
09-12 19:18	40m	-7 / -	CN8NS	- / -20	2	Partial capture
09-12 19:16	40m	-6 / -10	EH3ST	-10 / -18	4	✓ Full exchange observed
09-12 19:15	40m	- / -9	RX7KIR	-11 / -	2	✓ Closing fragment
09-12 19:08	40m	-2 / -14	OZ1KZX	-2 / -20	4	✓ Full exchange observed
09-12 16:19	40m	-4 / -	RW4Z	-8 / -15	2	✓ Closing observed
09-12 16:18	40m	-4 / -17	R8CW	-2 / -	3	✓ Closing observed
09-12 16:17	40m	- / -	R3WDW	+9 / -	3	Partial capture
09-12 16:17	40m	-4 / -	UN3P	- / -23	2	✓ Closing fragment
09-12 16:16	40m	+1 / -	RD4AAK	- / -14	2	✓ Closing fragment
09-12 16:15	40m	0 / -	RJ9M	- / -17	2	✓ Closing fragment
09-12 15:29	40m	-10 / -	RA0AG	- / -21	4	✓ Closing fragment
09-12 15:25	40m	- / -11	II6IALU	-5 / -	3	Partial capture
09-12 15:23	40m	-5 / -	UA9UIS	- / -11	2	✓ Closing fragment
09-09 19:51	40m	-16 / -5	EA8UP	+1 / -8	5	✓ Full exchange observed
09-09 19:50	40m	- / -8	MM0HVU	-20 / -	2	Partial capture
09-09 19:43	40m	+4 / -	IK5EEA	- / -11	2	Partial capture
09-09 19:42	40m	+4 / -13	EH3PDA	-17 / -19	2	Partial capture
09-09 19:41	40m	+3 / -	LB6MJ	-9 / -15	2	✓ Closing observed
09-09 19:39	40m	0 / +6	PI4DX	+8 / -2	4	✓ Full exchange observed
09-09 19:37	40m	-4 / -13	PC2K	-7 / -12	5	✓ Full exchange observed
09-09 19:32	40m	+2 / -	JH5LCN	- / -19	2	✓ Closing fragment
09-09 19:30	40m	+1 / -	IU2HUQ	-6 / -17	3	✓ Closing observed
09-09 19:29	40m	-8 / -	YO2MD	-2 / -9	3	✓ Closing observed
09-09 19:24	40m	-10 / -8	EI4JFB	-3 / -19	6	✓ Full exchange observed
09-05 20:14	40m	+2 / -	MW9LQA	0 / -19	3	✓ Closing observed
09-05 20:11	40m	+2 / -	JG8FWH	- / -11	2	Partial capture
09-05 20:09	40m	- / -15	LX1JH	+7 / -	2	✓ Closing fragment
09-05 20:04	40m	- / +1	DL8LE	+10 / -	4	✓ Closing fragment
09-05 20:04	40m	-7 / 0	IK4RVY	-3 / -14	3	✓ Full exchange observed
09-05 19:59	40m	-4 / -	SH7KAT	-5 / -11	3	✓ Closing observed
09-05 19:51	40m	-4 / +4	Z62NS	-3 / -10	4	✓ Full exchange observed
09-05 19:47	40m	0 / -	PE1NAO	-12 / -21	3	✓ Closing observed
09-05 19:45	40m	-1 / -	GJ0KYZ	- / -22	2	Partial capture
09-05 19:43	40m	0 / -7	LB5AK	-3 / -	4	✓ Closing observed
09-04 20:21	40m	-4 / -	9A9N	- / -19	2	✓ Closing fragment
09-04 20:20	40m	-5 / -1	SM6YEC	+3 / -17	4	✓ Full exchange observed
09-04 20:16	40m	-5 / -2	OK2VCR	+4 / -15	4	✓ Full exchange observed
09-04 20:15	40m	-4 / -	YO3OBB	0 / -16	3	✓ Full exchange observed
09-04 20:13	40m	-3 / -20	S57TW	+12 / -	2	✓ Closing observed
09-04 20:09	40m	- / -2	OZ/KD0NDU	+8 / -	2	Partial capture
09-04 20:07	40m	-12 / -	SO100PKP	- / -14	2	Partial capture
09-04 20:06	40m	-6 / -	UB4HVA	- / -13	2	✓ Closing fragment
09-04 20:05	40m	- / -	PA3BGQ	-3 / -	2	Partial capture
09-04 20:04	40m	- / -	DL1EDR	+5 / -	3	Partial capture
09-04 20:01	40m	- / -3	LA8ENA	+11 / -	4	✓ Closing fragment
09-04 20:00	40m	-6 / -18	SV5BYP	-5 / -16	4	✓ Full exchange observed
09-04 19:21	80m	- / -19	RA1TR	-8 / -	2	Partial capture
09-04 19:18	40m	-5 / -1	SO100PKP	-13 / -20	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
191600  -6 1897  R2DDA RX7KIR 73
191645  -9  706  EH3ST R2DDA -18
191700 -11 2145  R2DDA EH3ST R-10
191715  -4  705  EH3ST R2DDA RR73
191730  -9 2145  R2DDA EH3ST 73
191815  -9  720  CN8NS R2DDA -20 (x2)
191945  +3  720  GM0SDV R2DDA -18
192215  -5  773  CN8NS R2DDA -20 (x3)
192415  -9  849  R2DDA SQ4INW R-09
192430  +3  638  SQ4INW R2DDA RR73
192445  -7  849  R2DDA SQ4INW 73
192615  -9 2366  R6DOB/M R2DDA -02

80m

UTC    dB Audio  Message
201445 -24  279  R2DDA R2ASY R-26
201445 -10  426  R2DDA DO8JB JO32
201500  +1  718  R2DDA R7CD 73
201515 -19  279  R2DDA R2ASY R-26
201515  -6  426  R2DDA DO8JB JO32
201545 -21  279  R2DDA R2ASY R-26
201615  +1 1693  RA3VMK/P R2DDA -20
201630 -24 1509  R2DDA RA3VMK/P R+01 (x2)
201715 -12 1278  RA3VMK/P R2DDA RR73
201745 -15  279  R2DDA R2ASY R-26 (x3)
192100  -6 1358  R2DDA RA1TR -19 (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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