J48S — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Greece Most frequent locator attributed to this token: KM37

Receiver-side FT8 activity involving J48S, decoded by SO8OO in southeastern Poland. 3,571 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 20 UTC dates in the available aggregate history. Observed between 2026-09-15 and 2026-10-10.

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 3,571 FT8 messages attributed to J48S as the transmitting token by decoded message structure across 20 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (61%), followed by 60 m (39%) and 80 m (1%). Most decodes (75%) fell within the six-hour window 21:00-03:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

3,571

Messages attributed

UTC dates decoded

257

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 29 60m · 1,380 40m · 2,162

First attributed message: 2026-09-15
Last attributed message: 2026-10-10 05:30 UTC

Observed FT8 message patterns

Attributed sample: 3,571 messages
Active dates: 20 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -14.9 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 208, moderate (-15 to -9 dB) 1,462, strong (≥ -8 dB) 1,901.

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 J48S in decoded directed-looking exchanges:

F1PBZ · France ×4 DK7QJ · Fed. Rep. of Germany ×3 US2YW · Ukraine ×3 UT5ECZ · Ukraine ×3 W1JN · United States ×3 HA7TM · Hungary ×3 9A2TN · Croatia ×2 9A3K · Croatia ×2 CT3MD · Madeira Islands ×2 DK6MR · Fed. Rep. of Germany ×2 DL1GLO · Fed. Rep. of Germany ×2 DL3CY · Fed. Rep. of Germany ×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 J48S

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: KM37 · 2,239 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,444 km (approx.)
Last such locator decoded: 2026-10-10 05:25 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	J48S S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-10 06:00	40m	- / -9	R7KB	-5 / -	3	✓ Closing fragment
10-10 05:57	40m	- / -15	DK6WH	0 / -	3	✓ Closing fragment
10-10 05:48	40m	- / -10	IZ2JTL	+9 / -	3	✓ Closing fragment
10-10 05:34	40m	- / -	CT2GQA	-13 / -	3	Partial capture
10-10 05:32	40m	- / -1	LZ2SPD	+3 / -	3	✓ Closing fragment
10-10 05:29	40m	-16 / -	HB9IPM	-11 / -16	3	Partial capture
10-10 05:25	40m	- / -14	PA3CPS	-4 / -	3	✓ Closing fragment
10-10 05:19	40m	- / -10	CT2GQA	-14 / -	3	Partial capture
10-10 05:09	40m	- / -10	I4BUQ	0 / -	6	✓ Closing fragment
10-10 05:02	40m	-8 / -	F5NMO	-4 / -19	3	Partial capture
10-10 04:55	40m	- / -13	F4LNM	-1 / -	4	✓ Closing fragment
10-10 04:52	40m	- / -6	I6PJC	-10 / -	5	✓ Closing fragment
10-10 04:51	40m	- / -10	R7OP	-8 / -	4	Partial capture
10-10 04:44	40m	- / -8	S52RS	-14 / -	4	Partial capture
10-10 04:37	40m	-14 / -7	EA7NK	-14 / -17	4	✓ Full exchange observed
10-10 04:36	40m	-13 / -	OK1UOZ	- / -17	2	✓ Closing fragment
10-10 04:35	40m	- / -	R1FZ	-7 / -	2	Partial capture
10-10 04:33	40m	-10 / -	UW8SM	- / -4	2	✓ Closing fragment
10-10 04:32	40m	-11 / -	US0QV	- / +3	2	Partial capture
10-10 04:28	40m	-12 / +9	F4MXT/P	-6 / +8	3	Partial capture
10-10 04:28	40m	- / -18	R2EA	+6 / -	2	Partial capture
10-10 04:27	40m	- / -	DL1GLO	-13 / -	2	Partial capture
10-10 04:14	40m	- / -6	GJ0KYZ	+4 / -	2	✓ Closing fragment
10-10 04:06	40m	-13 / -	EW4PA	- / -15	2	✓ Closing fragment
10-10 04:04	40m	-10 / -	OK1UOZ	- / -20	2	Partial capture
10-10 04:00	40m	-12 / -19	LY4Q	-9 / -15	5	✓ Full exchange observed
10-10 03:58	40m	-13 / -	IW1GB	- / -10	2	✓ Closing fragment
10-10 03:56	40m	-11 / -	EA5JFO	- / -18	2	✓ Closing fragment
10-10 03:54	40m	-14 / -14	IW3RPS	+2 / -	4	✓ Closing observed
10-10 03:53	40m	-14 / -	UA3ZAB	- / -7	2	✓ Closing fragment
10-10 03:44	40m	- / -4	F5LZN	-6 / -	3	✓ Closing fragment
10-10 03:21	40m	-10 / -	S51VC	- / -8	2	✓ Closing fragment
10-10 03:15	40m	-6 / -	IN3MYW	- / -11	3	Partial capture
10-10 02:24	80m	- / -16	R7AW	+6 / -	2	✓ Closing fragment
10-10 02:02	80m	- / -15	RA4ABH	-6 / -	3	✓ Closing fragment
10-10 01:52	80m	- / -12	R3UG	-1 / -	4	Partial capture
10-10 01:49	80m	- / -20	R4HHN	-8 / -	3	✓ Closing fragment
10-10 01:46	80m	- / -24	LY2EW	+6 / -	3	✓ Closing fragment
10-10 01:27	80m	- / -	DO2AY	-8 / -	8	Partial capture
10-10 01:17	80m	- / -15	9A2TN	+4 / -	3	✓ Closing fragment
10-10 01:14	80m	- / -16	R5DT	+8 / -	3	✓ Closing fragment
10-10 01:09	80m	- / -25	OH7KB	+6 / -	5	Partial capture
10-10 01:06	80m	- / -18	RD4HX	-5 / -	3	Partial capture
10-10 01:03	80m	- / -	SP9ERY	+6 / -	2	Partial capture
10-10 00:53	80m	- / -	DL9KM	-3 / -	7	Partial capture
10-10 00:46	80m	- / -	DO1OAS	+1 / -	12	Partial capture
10-10 00:45	80m	- / -24	DA1VID	-5 / -	8	Partial capture
10-10 00:39	80m	- / -10	HA0AA	-12 / -	3	✓ Closing fragment
10-10 00:36	80m	- / -24	TF3VS	-6 / -	3	✓ Closing fragment
10-10 00:29	80m	- / -15	EB5CS	-12 / -	7	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
053245  +2  750  J48S LZ2SPD KN22 (x3)
053415 -14  751  J48S CT2GQA IM58 (x3)
054845 +12 2883  J48S IZ2JTL JN45 (x3)
055745  +3 1012  J48S DK6WH JO50 (x3)
060045  -5  748  J48S R7KB KN65 (x3)

80m

UTC    dB Audio  Message
014715  +7  667  J48S LY2EW 73
014845 -15 1396  J48S SV9COL 73
014915  -9  667  J48S R4HHN LO43 (x3)
015245  +0  254  J48S R3UG R-12 (x4)
020015  -7 1156  J48S UA3RBM RR73
020245  -5  668  J48S RA4ABH LO20 (x3)
022415  +6 1531  J48S R7AW -16 (x2)

60m

UTC    dB Audio  Message
230045 -15 1332  J48S EY8MM MM48
230100 -10  800  EY8MM J48S -13
230115 -16 1332  J48S EY8MM R-16
230230 -16  800  CQ J48S KM37                          a1 (x8)
230915 -11 2051  J48S EA8DOX IL18
230930 -14  800  EA8DOX J48S -08
230945 -13 2051  J48S EA8DOX R-01 (x2)

10m

UTC    dB Audio  Message
161745 -12  753  J48S CT5JLR IM59 (x12)
164845 -12  759  J48S EA7ATM +05 (x3)

160m

UTC    dB Audio  Message
185745 -12 1143  J48S S57MPU JN76 (x3)

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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