JA5WIO — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM64

Receiver-side FT8 activity involving JA5WIO, decoded by SO8OO in southeastern Poland. 2 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-26 and 2026-08-28.

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 JA5WIO 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 (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

40m · 2

First attributed message: 2026-08-26
Last attributed message: 2026-08-28 21:04 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 JA5WIO in decoded directed-looking exchanges:

UR1CCT · Ukraine ×2 CU2AP · Azores IS0BPX · Sardinia 9A60CBM · Croatia CN8NS · Morocco IT9EJW · Sicily SM0IJS · Sweden IT9IVN · Sicily UW2ZO · Ukraine

Most frequent locator attributed to JA5WIO

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: PM64 · 2 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,453 km (approx.)
Last such locator decoded: 2026-08-28 21:04 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	JA5WIO S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-01 21:18	40m	- / -13	<...>	-8 / -	2	Partial capture
08-28 20:38	80m	- / -14	IT9IVN	+4 / -	2	✓ Closing fragment
08-28 20:34	80m	- / -19	UW2ZO	+11 / -	3	✓ Closing fragment
08-28 10:43	10m	- / -13	CU2AP	-14 / -	2	✓ Closing fragment
08-26 21:10	40m	- / -21	CN8NS	-7 / -	3	✓ Closing fragment
08-26 21:01	40m	- / -	SV1MOZ	-15 / -	3	Partial capture
08-26 20:58	40m	- / -	R7ZY	+11 / -	10	Partial capture
08-26 20:57	40m	- / -18	9A60CBM	-8 / -	2	✓ Closing fragment
08-26 20:56	40m	- / -7	RA9ACA	-13 / -	7	Partial capture
08-26 20:45	40m	- / -	RK1B	-10 / -	3	Partial capture
08-24 20:45	40m	- / -	YT2FA	-13 / -	2	Partial capture
08-24 20:44	40m	- / -11	SM0IJS	-10 / -	2	✓ Closing fragment
08-24 20:40	40m	- / -17	DR800WE	-4 / -	3	Partial capture
08-24 20:38	40m	- / -21	II7MGBT	-7 / -	3	Partial capture
08-24 20:38	40m	- / -	ON4IQ	+15 / -	2	Partial capture
08-22 21:08	40m	- / -25	DR800WE	+2 / -	2	Partial capture
08-22 21:04	40m	- / -	RN6HK	+7 / -	2	Partial capture
08-22 20:59	40m	- / -9	UR1CCT	+21 / -	3	✓ Closing fragment
08-22 20:29	80m	- / -14	UR1CCT	+16 / -	3	✓ Closing fragment
08-22 20:29	80m	- / -	UA3ECJ	-6 / -	2	Partial capture
07-22 09:31	20m	- / -	EA7ALL	-15 / -	3	Partial capture
07-20 05:15	20m	- / -23	5P1KZX	-4 / -	5	Partial capture
07-13 04:05	20m	- / -25	OH1NHX	-15 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
210145 -15 1121  JA5WIO SV1MOZ KM17
210145 +14 2666  JA5WIO R7ZY KN98
210215 -16 1121  JA5WIO SV1MOZ KM17 (x2)
210315 +15 2666  JA5WIO R7ZY KN98 (x2)
210700 -18 1121  D2ACE JA5WIO PM64
211030  -6 2333  JA5WIO CN8NS -21 (x3)
210400 -15 1183  V51WH JA5WIO PM64
210715  -2  775  JA5WIO YO2NAA KN05
211800 -10 1990  JA5WIO <...> -13 (x3)

80m

UTC    dB Audio  Message
202915  -7 1245  JA5WIO UA3ECJ KO83
202945 +21  637  JA5WIO UR1CCT KN69
202945  -5 1245  JA5WIO UA3ECJ KO83
203045 +13  637  JA5WIO UR1CCT R-14 (x2)
203445 +11 2125  JA5WIO UW2ZO KN67 (x3)
203830  +4 2559  JA5WIO IT9IVN -14 (x2)

10m

UTC    dB Audio  Message
104300 -16 1163  JA5WIO CU2AP -13 (x2)

20m

UTC    dB Audio  Message
040545 -16  835  JA5WIO OH1NHX -25 (x3)
084730  -8 2118  JA5WIO TM00TFR -18
223915 -15 1115  JA5WIO IS0BPX RR73
051530  -4 2794  JA5WIO 5P1KZX -23 (x5)
093100 -17  770  JA5WIO EA7ALL IM88 (x3)
070845 -21 1563  JA5WIO EA8AP -15

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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