S54J — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

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

Receiver-side FT8 activity involving S54J, decoded by SO8OO in southeastern Poland. 480 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 22 UTC dates in the available aggregate history. Observed between 2026-06-25 and 2026-09-18.

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 480 FT8 messages attributed to S54J as the transmitting token by decoded message structure across 22 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (31%), followed by 20 m (30%) and 80 m (25%). Most decodes (66%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (71%); the estimated median was -3 dB.

Overview

480

Messages attributed

UTC dates decoded

Active 15-min windows

-3 dB

Estimated median S/N

Bands

160m · 60 80m · 120 40m · 149 20m · 144 10m · 7

First attributed message: 2026-06-25
Last attributed message: 2026-09-18 17:37 UTC

Observed FT8 message patterns

Attributed sample: 480 messages
Active dates: 22 UTC dates
Estimated median S/N: -3 dB
Estimated 10th-90th percentile: -15 to +10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 39, moderate (-15 to -9 dB) 101, strong (≥ -8 dB) 340.

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 S54J in decoded directed-looking exchanges:

DK3GI · Fed. Rep. of Germany HB3YPJ · Switzerland OH3NXW · Finland OK1DXR · Czech Republic OK2USM · Czech Republic OM7ASP · Slovak Republic PA4PA · Netherlands R2EA · European Russia SP2GJI · Poland SP2LLP · Poland SP9UPH · Poland SV1AER · Greece

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 S54J

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 · 273 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 631 km (approx.)
Last such locator decoded: 2026-09-18 17:37 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	S54J S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 18:46	40m	+5 / -	JA4FKX	-10 / -14	4	✓ Closing observed
09-12 18:45	40m	+7 / -	JA2VQF	- / -	3	Partial capture
09-12 18:22	40m	+2 / -	YC2BUZ	- / -	3	Partial capture
09-12 18:06	40m	+4 / -10	TA2/TF1OL	+2 / +9	6	Partial capture
09-12 17:52	40m	-6 / -	VJ6X	- / -	3	Partial capture
09-04 18:58	160m	-9 / -	R7OQ	- / -	2	Partial capture
09-04 18:37	160m	-2 / -	SV1AER	-17 / -3	3	✓ Closing observed
09-04 18:36	160m	- / -	RY3K	+8 / -	2	Partial capture
09-04 18:33	160m	-12 / -16	R2EA	-8 / -1	5	✓ Full exchange observed
09-04 17:59	160m	-5 / -	RZ1OK	- / -	4	Partial capture
09-04 17:51	160m	-4 / -13	UA6HJT	+1 / -9	7	✓ Full exchange observed
09-04 17:50	160m	-1 / -9	YU7YZ	+2 / +6	5	✓ Full exchange observed
09-04 00:54	160m	- / -12	DF2NV	-1 / -	3	Partial capture
09-04 00:52	160m	+8 / -	EA1CQ	- / -18	4	Partial capture
09-04 00:50	160m	+7 / -11	OM7ASP	+2 / -3	5	✓ Full exchange observed
09-04 00:31	160m	-2 / -	SV7BVM	- / -	4	Partial capture
09-03 22:31	80m	-7 / -	RI1FJL	- / -	6	Partial capture
08-31 20:18	160m	- / -	I1BEP	-12 / -	2	Partial capture
08-31 20:15	160m	-6 / -14	SP2GJI	-10 / -11	6	✓ Full exchange observed
08-31 20:13	160m	-2 / -9	DK3GI	-8 / +1	5	✓ Full exchange observed
08-31 20:13	160m	+1 / -	PA3FR	-17 / -12	3	Partial capture
08-31 20:13	160m	+6 / -9	SP9UPH	0 / -	5	✓ Closing observed
08-31 20:12	160m	- / -14	UZ5CA	-11 / -	3	Partial capture
08-31 20:11	160m	0 / -	OK2USM	-10 / -12	3	✓ Closing observed
08-31 20:10	160m	-1 / +2	OK1DXR	+1 / +1	5	✓ Full exchange observed
08-31 20:09	160m	+1 / -6	SP2LLP	+4 / -	5	✓ Closing observed
08-31 20:07	160m	-10 / -15	OH3NXW	-10 / -9	6	✓ Full exchange observed
08-31 20:04	160m	-14 / -	HB3YPJ	- / -20	4	✓ Closing fragment
08-30 01:47	80m	0 / -	W1IE	- / -	6	Partial capture
08-29 23:38	80m	+9 / -	VP2MAA	- / -	33	Partial capture
08-29 23:04	80m	- / -	LZ2VQ	+6 / -	3	Partial capture
08-29 23:02	80m	+8 / -	AA1V	- / -15	4	✓ Closing fragment
08-27 22:55	80m	-4 / -	9V1YC	- / -19	4	✓ Closing fragment
08-27 22:50	80m	-3 / -	9V1YC	- / -	2	Partial capture
08-27 19:10	80m	+2 / 0	YO4NT	+3 / -	4	✓ Closing observed
08-27 19:06	80m	-7 / -	HB0/HB9FXF	- / -8	4	Partial capture
08-23 02:21	20m	- / -10	KF9UG	-8 / -	3	✓ Closing fragment
08-23 01:04	20m	- / +1	WA2WAP	-14 / -	2	✓ Closing fragment
08-23 01:02	20m	- / -7	KM4RAA	-13 / -	4	✓ Closing fragment
08-23 01:00	20m	- / -7	AJ4BH	-22 / -	2	✓ Closing fragment
08-23 00:44	20m	-19 / -	WA2HIP	- / -10	2	✓ Closing fragment
08-23 00:42	20m	-4 / -	K0DSC	- / 0	2	Partial capture
08-23 00:41	20m	-4 / -	WX4DAT	- / +2	2	✓ Closing fragment
08-23 00:14	160m	+1 / -	PA4PA	-3 / -8	4	✓ Closing observed
08-22 23:15	20m	- / -	DA1EA	+2 / -	2	Partial capture
08-22 23:14	20m	-10 / -	KI5POE	- / -12	2	✓ Closing fragment
08-22 23:13	20m	-9 / -	F1IQH	- / +1	2	✓ Closing fragment
08-22 23:11	20m	-12 / -	KX4DRT	-6 / -	3	✓ Closing observed
08-22 23:10	20m	-14 / -	AB2OQ	- / -9	2	Partial capture
08-22 23:07	20m	-10 / -	KD8RUC	- / -22	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
235445  +6  560  VP2MAA S54J JN76 (x2)
014745  -1 1798  W1IE S54J JN76 (x6)
223145  -4  436  RI1FJL S54J JN76 (x6)
173730  +0 1757  ZL2NU S54J JN76

40m

UTC    dB Audio  Message
180715  +3 2938  TA2/TF1OL S54J R+09 (x4)
182245  +3  618  YC2BUZ S54J JN76 (x3)
184200  +5  485  JA2VQF S54J JN76 (x4)
184615 -10  930  S54J JA4FKX PM64
184630  +8  485  JA4FKX S54J -14 (x3)

160m

UTC    dB Audio  Message
180200  -8 1288  RZ1OK S54J JN76 (x2)
181745 -13 1343  RO7A S54J JN76
183345 -15 2018  R2EA S54J JN76
183400  -2 2018  S54J R2EA -16
183415 -11 2018  R2EA S54J R-01
183430 -14 2017  S54J R2EA RR73
183445  -9 2018  R2EA S54J 73
183630  +9 2505  S54J RY3K LO00
183700  -4 1528  SV1AER S54J JN76
183700  +7 2505  S54J RY3K LO00
183730  -1 1528  SV1AER S54J R-03
183815 -17 1528  S54J SV1AER RR73
185800  -7 1706  R7OQ S54J JN76 (x2)

20m

UTC    dB Audio  Message
004630 -22 2059  KF8BRK S54J RR73
005400 -18 2046  W4OBA S54J -10
010015 -20 1396  S54J AJ4BH R-07 (x2)
010245 -12 2367  S54J KM4RAA -07 (x3)
010415 -14 2198  S54J WA2WAP +01
010415 -14 2367  S54J KM4RAA RR73
010515 -14 2199  S54J WA2WAP RR73
022115 -10 1025  S54J KF9UG EN71 (x3)
023515 -14 1872  S54J W5ENG EL09
023715 -17  851  S54J AD8QV EN62

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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