S55OO — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Slovenia Most frequent locator attributed to this token: JN76

Receiver-side FT8 activity involving S55OO, decoded by SO8OO in southeastern Poland. 2,278 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 29 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-08.

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 2,278 FT8 messages attributed to S55OO as the transmitting token by decoded message structure across 29 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (87%), followed by 20 m (12%) and 10 m (2%). The busiest six-hour window was 17:00-23:00 UTC, containing 49% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

2,278

Messages attributed

UTC dates decoded

247

Active 15-min windows

-9 dB

Estimated median S/N

Bands

40m · 1,978 20m · 262 10m · 38

First attributed message: 2026-06-08
Last attributed message: 2026-09-08 14:13 UTC

Observed FT8 message patterns

Attributed sample: 2,278 messages
Active dates: 29 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -18 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 387, moderate (-15 to -9 dB) 836, strong (≥ -8 dB) 1,055.

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 S55OO in decoded directed-looking exchanges:

DG1RMY · Fed. Rep. of Germany ×2 SQ5WN · Poland ×2 DL4JTH · Fed. Rep. of Germany F5LMJ · France S55A · Slovenia HG3FNM · Hungary DL3HO · Fed. Rep. of Germany M9YLR · England UT4PA · Ukraine DG0PM · Fed. Rep. of Germany SP2TOP · Poland OE5OBR · Austria

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 S55OO

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: JN76 · 1,846 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 631 km (approx.)
Last such locator decoded: 2026-09-08 14:13 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	S55OO S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 14:12	40m	-7 / -	9A5MP	- / -	3	Partial capture
09-08 14:09	40m	-4 / -21	R2SL	0 / -8	7	✓ Full exchange observed
09-08 14:08	40m	- / -	F4GUK	-8 / -	3	Partial capture
09-08 14:07	40m	-4 / -	GB3RS	- / -7	2	✓ Closing fragment
09-08 14:05	40m	-6 / -	9A170NT	- / +2	2	Partial capture
09-08 07:33	40m	-6 / -	SQ100PKP	- / -1	2	Partial capture
09-07 18:36	40m	+6 / +3	EA6ZS	-11 / -5	5	✓ Full exchange observed
09-07 09:06	40m	-5 / -	DL3HN	- / 0	3	✓ Closing fragment
09-07 08:42	40m	-5 / -	EB5F	- / -1	3	✓ Closing fragment
09-02 17:28	40m	- / 0	LZ123RF	-14 / -	2	Partial capture
09-02 17:26	40m	+4 / -	OZ/DL1AX	- / -	2	Partial capture
09-02 17:18	40m	+2 / -2	9A3K	+5 / +4	4	✓ Full exchange observed
09-02 14:56	40m	0 / -	DH5ABC	-10 / -2	5	✓ Full exchange observed
09-02 14:49	40m	+2 / -	<...>	- / -2	5	Partial capture
09-02 14:46	40m	-6 / -	PD1SL	- / -	2	Partial capture
09-02 14:45	40m	-5 / -	DL6NDN	-6 / +2	5	✓ Full exchange observed
09-02 14:43	40m	-1 / -3	DA1MHH	-20 / -2	5	✓ Full exchange observed
09-02 14:37	40m	0 / -	F1IQH	- / +3	2	✓ Closing fragment
09-02 14:35	40m	+2 / -	<...>	- / +4	2	Partial capture
09-02 14:20	40m	-1 / +7	DL1ABI	-12 / +1	6	✓ Full exchange observed
09-02 14:17	40m	+2 / -	SQ9LDE	- / -2	3	✓ Closing fragment
09-01 09:30	40m	-6 / -	F1POK	- / -	5	Partial capture
09-01 09:12	40m	+1 / +8	IZ2FOS	-14 / +3	5	✓ Full exchange observed
09-01 09:07	40m	-1 / -	F1POK	- / -	4	Partial capture
09-01 08:57	40m	-3 / -	DH8KAM	- / -	5	Partial capture
09-01 06:27	40m	+9 / -4	G5GDX	-13 / -2	5	✓ Full exchange observed
08-31 07:16	20m	- / -9	TA3MPK	-12 / -	2	✓ Closing fragment
08-29 14:44	40m	-2 / -	R4WZ	- / -	3	Partial capture
08-29 13:57	40m	-6 / -9	DK2M	+6 / -3	4	✓ Full exchange observed
08-29 13:37	40m	-10 / -	<...>	- / +7	2	Partial capture
08-27 14:40	40m	-8 / -	PI80LDN	- / -	15	Partial capture
08-27 13:20	40m	-10 / -	OE7KTI	- / -2	4	✓ Closing fragment
08-27 12:06	40m	-20 / +8	OK1JPO	-8 / -	4	✓ Full exchange observed
08-27 11:57	40m	-18 / -	OK8CZ	- / -	13	Partial capture
08-27 11:54	40m	-18 / -	HA3HM	-10 / -	5	✓ Full exchange observed
08-27 07:10	40m	-7 / -	F4BNZ	- / -	2	✓ Closing fragment
08-27 07:03	40m	-8 / -	<...>	- / 0	2	Partial capture
08-27 06:58	40m	-4 / -	M8LYC	- / -	5	Partial capture
08-27 06:22	40m	-3 / -	KB1YTO	- / -	3	Partial capture
08-27 06:08	40m	0 / -	F8FSC/P	- / -4	5	✓ Closing fragment
08-27 06:02	40m	-2 / -	W7PK	- / -	5	Partial capture
08-27 05:58	40m	+2 / -	<...>	- / +4	2	Partial capture
08-27 05:54	40m	-1 / -	KZ4YS	- / -	5	Partial capture
08-27 05:51	40m	-3 / -	WB9NOE	- / -	5	Partial capture
08-27 05:47	40m	-5 / +3	IU5RTR	+2 / 0	5	✓ Full exchange observed
08-27 05:23	40m	-5 / -	KE2CUR	- / -	4	Partial capture
08-27 05:14	40m	-3 / -	DF7FZ	- / -	3	Partial capture
08-27 05:10	40m	-4 / -	I6XVL	0 / +2	5	✓ Full exchange observed
08-27 05:05	40m	-3 / -	W7PK	- / -	5	Partial capture
08-27 05:02	40m	-9 / -8	F4JJA	-12 / +2	7	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
140745  -3 2223  GB3RS S55OO -07
140800  -9  460  S55OO F4GUK JN18
140815  -6 2223  GB3RS S55OO RR73
140830  -6  460  S55OO F4GUK JN18
140900  -4 2223  R2SL S55OO JN76 (x2)
140930  -8  460  S55OO F4GUK JN18
141000  -2 2222  R2SL S55OO JN76
141045  -2 2563  S55OO R2SL -21
141100  -5 2223  R2SL S55OO R-08
141115  +1 2563  S55OO R2SL RR73
141130  -3 2223  R2SL S55OO 73
141215 -10 2223  9A5MP S55OO JN76 (x3)

20m

UTC    dB Audio  Message
065315  +4 2096  <...> S55OO JN76 (x2)
135230 -16 1862  S55OO M0CKX RR73 (x2)
145300  -8 2270  S55OO JG8DIV QN02 (x2)
172030  +2 1723  S55OO AO5FSB -07 (x2)
172315  +8  880  S55OO EB1DJ -08 (x2)
172815  -9 1421  S55OO EA5JLN +03
071600  -9 2287  S55OO TA3MPK -09 (x2)
072030  +4 1314  UU4DWV S55OO JN76
072345  -2 2335  S55OO PD0WH -09

10m

UTC    dB Audio  Message
100545  -6 2355  T22TT S55OO JN76 (x7)
081315 -11 2333  S55OO OZ1MAX +01 (x2)
082200 -12 2334  S55OO RU3GF -07 (x2)
082645 -16 1372  <...> S55OO JN76 (x2)
180145 -10  668  S55OO PE1MSU -13 (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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