S55A — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Slovenia Most frequent locator attributed to this token: JN65

Receiver-side FT8 activity involving S55A, decoded by SO8OO in southeastern Poland. 5,877 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 77 UTC dates in the available aggregate history. Observed between 2026-06-06 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 5,877 FT8 messages attributed to S55A as the transmitting token by decoded message structure across 77 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (66%), followed by 20 m (21%) and 10 m (13%). The busiest six-hour window was 03:00-09:00 UTC, containing 42% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

5,877

Messages attributed

UTC dates decoded

644

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 3,893 20m · 1,249 10m · 735

First attributed message: 2026-06-06
Last attributed message: 2026-09-19 05:05 UTC

Observed FT8 message patterns

Attributed sample: 5,877 messages
Active dates: 77 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -17 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 959, moderate (-15 to -9 dB) 2,113, strong (≥ -8 dB) 2,805.

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 S55A in decoded directed-looking exchanges:

F1IQH · France ×5 F1PBZ · France ×3 PD2WL · Netherlands ×3 TA3NK · Asiatic Turkey ×3 DL1FTY · Fed. Rep. of Germany ×2 DL3MIB · Fed. Rep. of Germany ×2 DL9KM · Fed. Rep. of Germany ×2 EA5JLB · Spain ×2 EU4U · Belarus ×2 M0LOW · England ×2 ON8PB · Belgium ×2 PD0HLA · Netherlands ×2

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 S55A

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: JN65 · 3,216 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 821 km (approx.)
Last such locator decoded: 2026-09-19 05:05 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	S55A S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 05:03	40m	-3 / -	KE5ETC	- / -	4	Partial capture
09-19 05:01	40m	-5 / -	KG6PH	- / -	4	Partial capture
09-19 04:56	40m	0 / -14	UR4QWW	-6 / -7	6	✓ Full exchange observed
09-19 04:53	40m	-7 / -	KE5ETC	- / -	5	Partial capture
09-19 04:51	40m	-7 / -14	UT5MB	-5 / -3	4	✓ Full exchange observed
09-19 04:49	40m	-2 / -	KG6PH	- / -	3	Partial capture
09-18 08:25	40m	-12 / -	EH3ST	- / -	2	Partial capture
09-16 07:37	40m	-4 / -	EB4FGE	- / -19	3	Partial capture
09-16 07:33	40m	- / -11	ON2ACO	-11 / -	2	✓ Closing fragment
09-16 07:30	40m	- / -1	IU3IOV	-2 / -	3	✓ Closing fragment
09-16 07:26	40m	-6 / -12	F4EIK	-12 / -	3	✓ Closing observed
09-16 07:21	40m	-4 / -	SH7KAT	- / -	2	Partial capture
09-16 07:20	40m	-5 / -11	EA2BHE	-13 / -5	3	✓ Full exchange observed
09-16 07:17	40m	0 / -	F4IPY	- / -	3	Partial capture
09-16 06:56	40m	+2 / -	F4NEM/P	- / -6	4	✓ Closing fragment
09-16 06:53	40m	-6 / -	F4CQS	- / -	3	Partial capture
09-16 06:52	40m	-2 / -	F3CJ	- / +3	2	✓ Closing fragment
09-16 06:50	40m	-4 / -	EA5OL	- / -	2	Partial capture
09-16 06:47	40m	-2 / +1	OK1CT	+4 / -2	6	✓ Full exchange observed
09-16 06:46	40m	-2 / -	DL6GD	- / -10	3	✓ Closing fragment
09-16 06:44	40m	+2 / -8	SP3HYK	+4 / -2	6	✓ Full exchange observed
09-16 06:37	40m	-2 / -	HK3TY	- / -25	12	Partial capture
09-16 06:36	40m	-2 / -	F1JPG	- / -10	2	✓ Closing fragment
09-16 06:34	40m	-3 / -	II7IABB	- / +2	4	Partial capture
09-16 06:33	40m	-1 / -	OT7K	+5 / +4	4	✓ Closing observed
09-16 06:29	40m	-4 / -	EB4FGE	- / -26	2	Partial capture
09-16 06:27	40m	+1 / -	I0/VA3ITA	- / 0	2	Partial capture
09-16 06:22	40m	-6 / +1	F8FKI	-6 / 0	5	✓ Full exchange observed
09-16 06:21	40m	-4 / -	IZ8EOB	- / -5	2	✓ Closing fragment
09-16 06:17	40m	+4 / -	YL3ARH	- / -	3	Partial capture
09-16 06:16	40m	-2 / -14	YO3GK	+10 / -7	5	✓ Full exchange observed
09-16 06:13	40m	-5 / -	G8TPM	- / -	3	Partial capture
09-16 06:12	40m	-4 / -	PD0LH	- / 0	2	✓ Closing fragment
09-16 06:09	40m	-6 / -	XE1NK	- / -	4	Partial capture
09-16 05:58	40m	-10 / -	EA3EQT	- / -18	2	Partial capture
09-16 05:54	40m	-7 / -	WA2HIP	- / -	3	Partial capture
09-16 05:51	40m	-1 / -	SM3AFR	- / -	5	✓ Closing fragment
09-16 04:37	40m	- / -13	UA3YPS	-5 / -	3	✓ Closing fragment
09-16 04:22	40m	-3 / -	KI4NPG	- / -	3	Partial capture
09-16 04:20	40m	-4 / -	KD9MSN	- / -20	2	Partial capture
09-16 04:17	40m	-10 / -	GM6URC	- / -14	2	✓ Closing fragment
09-16 04:13	40m	-5 / -	6Y5HN	- / -17	6	Partial capture
09-15 21:02	40m	- / -13	R7GR	-6 / -	2	✓ Closing fragment
09-15 20:37	40m	- / -	OH1LA	-8 / -	3	Partial capture
09-15 20:32	40m	- / -	F5SJC	-4 / -	2	✓ Closing fragment
09-15 20:25	40m	- / -10	MW7RHR	-11 / -	3	✓ Closing fragment
09-15 08:40	40m	-10 / -	DF7JS	- / -	2	Partial capture
09-15 08:39	40m	-4 / -	DJ8TX	- / -9	2	✓ Closing fragment
09-15 08:36	40m	-11 / -	F4CQS	- / -	2	Partial capture
09-15 08:35	40m	-8 / -	DL9KV	-16 / -	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
045715  +2 2214  UR4QWW S55A RR73
045730  -8 2485  S55A UR4QWW 73
045745  -5 2214  CQ S55A JN65 (x2)
045915  -3 2215  R2EA/P S55A JN65
050115 -13 2232  UB3ADO/P S55A JN65
050145  -8 2232  KG6PH S55A JN65 (x4)
050345  +0 2232  KE5ETC S55A JN65 (x4)
050545  +0 2232  CQ S55A JN65

20m

UTC    dB Audio  Message
051030 -22 1359  S55A RC8SAB -13
055530 -12 1252  S55A R3BIS -14 (x2)
060130 -20 2126  S55A VK7ZBX RR73
060230 -24 1528  S55A LB6CG -04
061730  +0  879  S55A LA6AFA JO59
061800 -21 1872  S55A RA4Y LO35
061800 -14  879  S55A LA6AFA R-02 (x2)
063200 -11 1873  S55A RA4Y LO35 (x4)
072430 -19 2180  S55A F8ARK IN94 (x2)

10m

UTC    dB Audio  Message
173330 -18 1054  CQ S55A JN65 (x3)
173500 -13 1054  SP2EUI S55A JN65
173600 -12 1055  <...> S55A R-10
173700 -13 1054  CQ S55A JN65
173800 -16 1054  SP7IWA S55A RR73
173830  -9 1054  CQ S55A JN65 (x2)
173930 -14 1054  OZ2AEM S55A JN65 (x4)
174200 -18 1054  CQ S55A JN65
080500 -20 1679  RU9CZ S55A JN65

80m

UTC    dB Audio  Message
202700  +1  831  S55A G4SRT IO82 (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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