JA8KSF — 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: Japan Most frequent locator attributed to this token: QN03

Receiver-side FT8 activity involving JA8KSF, decoded by SO8OO in southeastern Poland. 2 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-20 and 2026-10-23.

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 FT8 messages attributed to JA8KSF as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The available sample contains attributed decodes on 40 m (50%) and 20 m (50%). 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

40m · 1 20m · 1

First attributed message: 2026-07-20
Last attributed message: 2026-10-23 20:56 UTC

Observed FT8 message patterns

Attributed sample: 2 messages
Active dates: 2 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:

LX1TI · Luxembourg ×2 4J3DJ · Azerbaijan DL3IAE · Fed. Rep. of Germany ES2AJ · Estonia EW6CB · Belarus IZ7NLJ · Italy OH5KNL · Finland OH7MA · Finland RQ7O · European Russia SM0CXS · Sweden SM2LIY · Sweden SP3PLD · Poland

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
11-03 18:51	160m	- / -	IS0BOZ	-2 / -	2	Partial capture
11-03 18:50	160m	- / -16	OH7MA	+3 / -	5	✓ Closing fragment
11-03 18:04	40m	- / -15	LZ2PC	+4 / -	4	✓ Closing fragment
10-23 22:05	80m	- / -23	4O4A	+8 / -	2	Partial capture
10-23 20:55	40m	-23 / -26	EA3EDU	-7 / -	5	✓ Closing observed
10-19 18:28	160m	- / -	DC5PPM	-4 / -	2	Partial capture
10-19 17:55	160m	- / -19	DC5PPM	+2 / -	2	Partial capture
10-16 20:44	160m	- / -14	4J3DJ	-2 / -	2	✓ Closing fragment
10-15 18:10	40m	- / -	S52KK	-2 / -	3	Partial capture
10-12 20:18	80m	- / -19	R5BS	-1 / -	4	✓ Closing fragment
10-12 20:12	80m	- / -	UF5F	-5 / -	3	✓ Closing fragment
10-09 20:46	40m	- / -	IU2THY	-4 / -	3	Partial capture
10-09 20:46	40m	- / -	DF8RU	-3 / -	4	Partial capture
10-09 20:36	40m	- / -11	IZ5IMD	-9 / -	3	✓ Closing fragment
10-09 20:35	40m	- / -	DL6RS	-8 / -	4	Partial capture
10-09 20:35	40m	- / -	OM5ALL	-8 / -	6	Partial capture
10-09 20:26	40m	- / -15	IK1JUS	+4 / -	4	✓ Closing fragment
10-09 20:25	40m	- / -	9A5CW	-9 / -	8	Partial capture
10-09 20:25	40m	- / -5	IK4DCW	-2 / -	7	✓ Closing fragment
10-09 20:24	40m	- / -	SP9AU	-2 / -	2	Partial capture
10-09 20:23	40m	- / -18	IK2JYT	+6 / -	3	Partial capture
10-05 19:56	40m	- / -20	GU4WRP	-7 / -	3	✓ Closing fragment
09-30 19:25	160m	- / -	SP2HMT	+5 / -	3	Partial capture
09-30 19:24	160m	- / -	R5BS	+2 / -	2	Partial capture
09-30 19:23	160m	- / -22	UX0LL	0 / -	3	✓ Closing fragment
09-30 19:22	160m	- / -15	IZ7NLJ	+4 / -	2	✓ Closing fragment
09-30 19:16	160m	- / -	DG2KW	-3 / -	2	Partial capture
09-30 19:14	160m	- / -20	LA7GIA	-4 / -	3	Partial capture
09-30 19:13	160m	- / -12	EW6CB	-2 / -	3	✓ Closing fragment
09-30 19:12	160m	- / -18	SM0CXS	-6 / -	2	✓ Closing fragment
09-22 19:01	160m	- / -	SP5UFK	-3 / -	3	Partial capture
09-22 18:34	160m	- / -21	DL3IAE	-6 / -	6	✓ Closing fragment
09-22 18:01	160m	- / -18	IV3SKB	+12 / -	2	Partial capture
09-22 17:52	160m	- / -17	US0YA	+16 / -	4	✓ Closing fragment
09-22 17:51	160m	- / -7	SM2LIY	-7 / -	2	✓ Closing fragment
09-21 19:26	80m	- / -12	DJ7M	+22 / -	2	✓ Closing fragment
09-21 19:14	80m	- / -19	LX1TI	-2 / -	4	✓ Closing fragment
09-21 18:48	160m	- / -13	OH5KNL	-2 / -	2	✓ Closing fragment
09-21 18:17	160m	- / -	SP5GW	-2 / -	2	Partial capture
09-21 18:17	160m	- / -	OK1XV	+2 / -	4	Partial capture
09-21 18:16	160m	- / -20	SP3PLD	+15 / -	3	✓ Closing fragment
09-21 18:15	160m	- / -	PA3DUU	-12 / -	4	Partial capture
09-21 18:13	160m	- / -25	RQ7O	+12 / -	3	✓ Closing fragment
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

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
204515  -2  445  JA8KSF 4J3DJ RR73
175315  +0 1934  JA8KSF DC5PPM JN59
175545  -6 2928  JA8KSF RJ6B KN95
175545  +0 1934  JA8KSF DC5PPM R-19 (x4)
185045  +2 1703  JA8KSF OH7MA -16 (x2)
185115  +0  796  JA8KSF IS0BOZ JM49
185145  +8 1703  JA8KSF OH7MA -16 (x3)
185245  -3  796  JA8KSF IS0BOZ JM49 (x2)

40m

UTC    dB Audio  Message
204745  +0 2751  JA8KSF IU2THY JN45
204745  -5 1537  JA8KSF DF8RU JN68
183545  -2 2724  JA8KSF IU2CAT JN45
181045  -4  866  JA8KSF S52KK JN76 (x3)
205500  -7  369  JA8KSF EA3EDU JN01 (x3)
205615 -23 2181  EA3EDU JA8KSF RR73
205630 -12  369  JA8KSF EA3EDU 73
180415  -2 1296  JA8KSF LZ2PC KN22 (x4)

80m

UTC    dB Audio  Message
191445  -7  994  JA8KSF LX1TI -19 (x4)
192600 +21  438  JA8KSF DJ7M -12 (x2)
201230  -9 1949  JA8KSF UF5F KO98 (x3)
201800  -4 1039  JA8KSF R5BS KO85 (x4)
220500  +6 2624  JA8KSF 4O4A -23 (x2)

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)

CW

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

Explore CW reception at SO8OO

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