DO1SWC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN58

Receiver-side FT8 activity involving DO1SWC, decoded by SO8OO in southeastern Poland. 1,529 FT8 messages attributed to this token as transmitter, on 160m, 80m, 10m, across 52 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-10.

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 1,529 FT8 messages attributed to DO1SWC as the transmitting token by decoded message structure across 52 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (86%), followed by 10 m (14%) and 160 m (1%). Most decodes (94%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

1,529

Messages attributed

UTC dates decoded

213

Active 15-min windows

-10 dB

Estimated median S/N

Bands

160m · 8 80m · 1,308 10m · 213

First attributed message: 2026-06-06
Last attributed message: 2026-09-10 21:15 UTC

Observed FT8 message patterns

Attributed sample: 1,529 messages
Active dates: 52 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -18 to -3.1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 281, moderate (-15 to -9 dB) 677, strong (≥ -8 dB) 571.

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 DO1SWC in decoded directed-looking exchanges:

DO1KD · Fed. Rep. of Germany ×2 SM6JQZ · Sweden ×2 IQ3UCY · Italy ×2 IQ8PC · Italy ×2 OH5WWA · Finland ×2 GI4SNA · Northern Ireland OH6B · Finland TF4M · Iceland SM5URS · Sweden SM6WZI · Sweden DK5WL · Fed. Rep. of Germany TM2WWA · France

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 DO1SWC

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: JN58 · 1,120 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 799 km (approx.)
Last such locator decoded: 2026-09-10 21:15 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	DO1SWC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-10 21:14	80m	-14 / -9	DL1ESZ	-10 / -	4	Partial capture
09-10 21:11	80m	-12 / -9	IQ2AAH	-4 / -8	6	✓ Full exchange observed
09-10 21:03	80m	-13 / -	Z62NS	- / -	7	Partial capture
09-10 20:55	80m	-17 / -	S57MPU	- / -	3	Partial capture
09-10 18:51	80m	-20 / -18	LA7PKA	-13 / -13	9	✓ Full exchange observed
09-10 18:44	80m	-13 / 0	LB6BK	-13 / -13	10	✓ Full exchange observed
09-10 18:41	80m	-18 / -13	3Z0SYBIR	+9 / -	2	Partial capture
09-09 20:10	160m	- / -11	LZ936BA	+6 / -	2	Partial capture
09-09 20:01	80m	-12 / -17	GI4SNA	+2 / 0	13	✓ Full exchange observed
09-09 19:57	80m	-8 / -	YU7AS	- / -	4	Partial capture
09-09 19:51	80m	-11 / -16	EI5JL	-11 / -	6	Partial capture
09-09 19:48	80m	- / -15	GX4RAF/P	-10 / -	4	Partial capture
09-09 19:44	80m	-12 / -	DD1OO	- / -14	2	Partial capture
09-09 19:41	80m	-12 / -	YU7AS	- / -	2	Partial capture
09-09 19:38	80m	- / -3	PA4CC	+3 / -	3	✓ Closing fragment
09-09 19:34	80m	-24 / -	DG1ASE	- / -11	2	✓ Closing fragment
09-09 19:31	80m	-16 / -	DK5CR/QRP	- / +5	3	Partial capture
09-09 19:14	80m	-14 / -	MM0ULL	- / -	8	Partial capture
09-08 20:15	80m	-12 / -5	LA1XFA	+1 / -	4	✓ Closing observed
09-08 20:12	80m	-9 / -17	OH2NAG	-3 / -12	7	✓ Full exchange observed
09-08 19:01	160m	- / -11	SP2HMT	-4 / -	2	✓ Closing fragment
09-08 18:31	80m	-7 / -10	DO9MH	-3 / -5	7	✓ Full exchange observed
09-08 18:28	80m	-7 / -14	SA6BZZ	-8 / -19	7	✓ Full exchange observed
09-08 18:27	80m	-8 / -	SQ5EXI	- / -	2	Partial capture
09-08 18:25	80m	-12 / -	SA6BZZ	- / -	2	Partial capture
09-07 17:29	80m	-18 / -5	OZ7CL	-6 / -	3	✓ Closing observed
09-07 17:25	80m	-17 / -	TA1PB	-11 / -14	8	✓ Closing observed
09-07 17:21	80m	-20 / -4	IK5SLA	-10 / -8	7	✓ Full exchange observed
09-07 17:20	80m	-18 / -	SP100PKP	- / -	3	Partial capture
09-07 17:18	80m	-11 / -5	OV6ZM	-10 / -8	5	✓ Full exchange observed
09-07 17:16	80m	-7 / -	SQ100PKP	- / +6	2	Partial capture
09-07 16:16	80m	-16 / -	SP5HQZ	- / -	4	Partial capture
09-02 19:08	80m	-15 / -	I1APQ	- / -4	6	Partial capture
09-02 19:05	80m	-18 / -	<...>	- / -	4	Partial capture
09-02 19:00	80m	-14 / -	HB9DBM	- / -	10	Partial capture
09-02 18:57	80m	-7 / -	SQ1X	- / -19	6	✓ Closing fragment
09-02 18:53	80m	-5 / -	LA9GX	- / -	7	Partial capture
09-01 20:24	80m	- / -16	SN100PKP	+10 / -	3	Partial capture
09-01 19:59	80m	- / -2	IU1DXU	-8 / -	2	✓ Closing fragment
08-31 19:20	160m	- / -9	OK1TP	-6 / -	2	✓ Closing fragment
08-31 19:16	80m	-15 / -	SM6YRB	- / -	3	Partial capture
08-29 21:35	80m	-8 / -	2E0AAG	- / -	5	Partial capture
08-29 21:32	80m	-20 / -19	GB0SL	-13 / -14	4	✓ Full exchange observed
08-29 21:25	80m	- / -18	LZ6C	0 / -	2	✓ Closing fragment
08-29 20:48	80m	-22 / -	HB040A	- / -	2	Partial capture
08-29 20:37	80m	-10 / -	EI4JFB	- / -	6	Partial capture
08-29 19:49	80m	-16 / -	LA1SDX	- / -	6	Partial capture
08-29 18:56	80m	-15 / -17	SM5RYW	-16 / -20	8	✓ Full exchange observed
08-29 18:52	80m	-11 / -	ON4MGV	- / -	3	Partial capture
08-29 18:49	80m	- / -18	YO3OBB	+2 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
210615 -13 2012  Z62NS DO1SWC JN58 (x5)
211115 -12 2012  IQ2AAH DO1SWC JN58 (x2)
211200  -4 1118  DO1SWC IQ2AAH -09
211215 -11 2012  IQ2AAH DO1SWC R-08
211230  -4 1118  DO1SWC IQ2AAH RR73
211245 -10 2012  IQ2AAH DO1SWC 73
211445 -14 2012  DL1ESZ DO1SWC JN58 (x3)
211600 -10 2301  DO1SWC DL1ESZ -09

160m

UTC    dB Audio  Message
204345 -17 2222  DO1SWC PE0TS RR73 (x2)
204445 +14 2125  DO1SWC SP3BPU JO82 (x3)
204600 -24 1977  G8OO DO1SWC JN58
192015 -12 1821  DO1SWC OK1TP -09 (x2)
190100  -4  845  DO1SWC SP2HMT -11 (x2)
190400  -7 1142  DO1SWC DA100TV -13
201030  +6 1487  DO1SWC LZ936BA -11 (x2)
201545 -24 1889  <SP100PKP> DO1SWC JN58
203100 +12 1963  DO1SWC RR73; SP8ONV <...> +00

10m

UTC    dB Audio  Message
194645 -14 1999  LA3YNA DO1SWC JN58 (x3)
195000 -17 1998  <...> DO1SWC JN58 (x3)
183330 -24 1888  R6OU DO1SWC JN58 (x4)
183730 -19 1888  PY4ZW DO1SWC JN58 (x3)
184730 -22 1832  CE8EIO DO1SWC 73
184845 -18 1832  GM3DGD DO1SWC JN58

60m

UTC    dB Audio  Message
220030 -14 2033  DO1SWC DL1TJ JN69 (x5)

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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