JA8KSF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: QN03

Receiver-side FT8 activity involving JA8KSF, decoded by SO8OO in southeastern Poland. 1 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-07-20.

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 FT8 messages attributed to JA8KSF as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The available sample contains attributed decodes on 20 m (100%). The sample is too small to infer a recurring UTC-hour or received-S/N pattern.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

S/N pattern not inferred

Bands

20m · 1

First attributed message: 2026-07-20
Last attributed message: 2026-07-20 20:29 UTC

Observed FT8 message patterns

Attributed sample: 1 messages
Active dates: 1 UTC dates
S/N summary: Too few decodes
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with JA8KSF in decoded directed-looking exchanges:

IT9CCB · Sicily IU7GSN · Italy M5RJR · England ES2AJ · Estonia DG5PW · Fed. Rep. of Germany DK4FP · Fed. Rep. of Germany EA5FQ · Spain EA7EZ · Spain EA8UP · Canary Islands G0LZX · England IK1EZX · Italy IU8SOQ · Italy

Most frequent locator attributed to JA8KSF

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: QN03
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,073 km (approx.)
Last such locator decoded: 2026-07-20 20:29 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	JA8KSF S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 18:03	160m	- / -13	ES2AJ	+4 / -	3	✓ Closing fragment
09-13 20:50	40m	- / -	SV3CNX	-7 / -	6	Partial capture
09-13 20:35	40m	- / -21	PC2J	-1 / -	5	✓ Closing fragment
09-13 20:32	40m	- / -17	DJ9BX	-15 / -	3	✓ Closing fragment
09-13 20:23	40m	- / -6	RK2A	+2 / -	2	✓ Closing fragment
09-02 08:28	40m	- / -	DL9AU	-18 / -	2	Partial capture
08-30 20:42	80m	- / -	DL2DBR	-5 / -	3	Partial capture
08-19 19:46	40m	- / -9	RV6AVU	0 / -	3	✓ Closing fragment
08-19 19:34	40m	- / -	SP9NR	-3 / -	2	Partial capture
08-19 19:32	40m	- / +2	RL3T	-10 / -	2	✓ Closing fragment
08-09 21:18	20m	- / -	MI7RDK	-12 / -	2	Partial capture
08-09 20:43	20m	- / -13	EA7EZ	-22 / -	2	✓ Closing fragment
08-09 20:42	20m	- / -8	IW4AOT	-4 / -	2	✓ Closing fragment
08-09 20:38	20m	- / -18	ER3BN	-16 / -	4	Partial capture
08-09 20:37	20m	- / -14	IW4AOT	-8 / -	2	Partial capture
08-09 20:34	20m	- / -1	EA4ITB	-16 / -	5	Partial capture
08-09 20:32	20m	- / -	M9VHB	-15 / -	3	✓ Closing fragment
08-09 08:29	20m	- / -1	DK4FP	-4 / -	4	✓ Closing fragment
08-02 09:23	10m	- / -1	IU7GSN	-14 / -	2	✓ Closing fragment
07-28 21:16	20m	- / -	DK8SJ	-2 / -	2	Partial capture
07-28 20:49	20m	- / -9	IU8SOQ	-12 / -	2	✓ Closing fragment
07-27 21:19	20m	- / -14	PA4AA	0 / -	2	Partial capture
07-27 21:17	20m	- / -10	G0LZX	-14 / -	2	✓ Closing fragment
07-27 21:00	20m	- / -	PD7BDN	-10 / -	2	Partial capture
07-26 21:32	20m	- / -	G8IXM	-16 / -	2	Partial capture
07-25 22:02	20m	- / -13	EA7AQY	-15 / -	3	Partial capture
07-25 21:43	20m	- / -18	EA5FQ	-14 / -	4	✓ Closing fragment
07-20 20:42	20m	- / +8	UN7PTN	-13 / -	2	✓ Closing fragment
07-20 20:30	20m	- / -4	R4FDW	-9 / -	2	Partial capture
07-20 20:29	20m	- / +3	SV1RXI	-21 / -	3	Partial capture
07-20 20:22	20m	- / -9	IU0VOG	-10 / -	3	Partial capture
07-20 20:17	20m	- / -4	RD6OZ	-12 / -	3	✓ Closing fragment
07-20 20:17	20m	- / -	DL1R	+6 / -	4	Partial capture
07-15 21:41	20m	- / -10	EA8UP	-6 / -	2	✓ Closing fragment
07-15 21:17	20m	- / -	DL1R	+3 / -	7	Partial capture
07-15 21:13	20m	- / -	F4BYA	-2 / -	2	Partial capture
06-29 06:01	20m	- / -	W1ABY	-6 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
180345  +2 2421  JA8KSF ES2AJ -13 (x3)

40m

UTC    dB Audio  Message
203315 -14 2188  JA8KSF DJ9BX 73
203545  -4 1596  JA8KSF PC2J JO22 (x4)
203715 -22 1790  JA8KSF ON1JP -13
203745  -1 1596  JA8KSF PC2J 73
203945 -16 1790  JA8KSF ON1JP -13
204515 -17  850  JA8KSF DK1CE JN48
205015 -12 1283  JA8KSF SV3CNX KM17 (x6)

80m

UTC    dB Audio  Message
204215  -2 2960  JA8KSF DL2DBR JO30 (x3)

20m

UTC    dB Audio  Message
203600 -18 1337  JA8KSF EA4ITB R-12 (x3)
203730  -5 2484  JA8KSF IW4AOT -14 (x2)
203830 -13 2029  JA8KSF ER3BN -18 (x4)
204200  -2 2484  JA8KSF IW4AOT -08 (x2)
204330 -23 1767  JA8KSF EA7EZ R-13 (x2)
211800 -14 1884  JA8KSF MI7RDK IO74 (x2)

10m

UTC    dB Audio  Message
085815 -13  946  JA8KSF M5RJR RR73
091045 -10  636  JA8KSF IT9CCB 73
092345 -15  897  JA8KSF IU7GSN R-01 (x2)

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