JA9FPI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM86

Receiver-side FT8 activity involving JA9FPI, decoded by SO8OO in southeastern Poland. 73 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-06-06.

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 73 FT8 messages attributed to JA9FPI as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -2 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

20m · 73

First attributed message: 2026-06-06
Last attributed message: 2026-06-06 22:02 UTC

Observed FT8 message patterns

Attributed sample: 73 messages
Active dates: 1 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -12 to +6 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 51.

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 JA9FPI in decoded directed-looking exchanges:

YL3CW · Latvia G4ZFJ · England OH6JD · Finland SP2HNF · Poland YO4NT · Romania

Most frequent locator attributed to JA9FPI

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: PM86 · 68 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,497 km (approx.)
Last such locator decoded: 2026-06-06 22:02 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	JA9FPI S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-01 17:33	80m	- / -	YO2MAX	+22 / -	2	Partial capture
08-28 11:45	10m	- / -	HB9SNR	-19 / -	2	Partial capture
08-14 21:34	40m	- / -	YO9BGU	-8 / -	2	Partial capture
08-13 19:44	160m	- / -	OM2WQ	+10 / -	2	Partial capture
08-13 19:15	160m	- / -	OM2WQ	+2 / -	2	Partial capture
08-13 19:08	160m	- / -	RA3BY	-2 / -	2	Partial capture
08-13 19:07	160m	- / -	OM2WQ	+6 / -	6	Partial capture
08-13 19:07	160m	- / -8	YL3CW	-2 / -	2	✓ Closing fragment
08-10 20:30	80m	- / -	DO8JB	-14 / -	3	Partial capture
08-10 20:29	80m	- / -	DK6ED	-3 / -	3	Partial capture
08-10 20:28	80m	- / -	SP9UPH	+14 / -	3	Partial capture
08-10 20:28	80m	- / -19	DL4RAQ	+5 / -	5	Partial capture
08-10 20:28	80m	- / -	G4YKQ	-20 / -	2	Partial capture
08-10 20:24	80m	- / -17	G4ZFJ	-4 / -	6	✓ Closing fragment
08-10 20:24	80m	- / -	SV8TCK	-6 / -	3	Partial capture
08-10 20:23	80m	- / -19	OH6JD	-4 / -	4	✓ Closing fragment
08-10 20:23	80m	- / -16	SP2HNF	+19 / -	3	✓ Closing fragment
07-24 13:22	20m	- / -18	PD0NHM	-15 / -	2	Partial capture
07-09 13:55	20m	- / -	R7DX	-4 / -	4	Partial capture
06-26 20:05	80m	- / -18	YO4NT	+10 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
202830 -21 2184  JA9FPI G4YKQ IO91
202830  +2  552  JA9FPI DL4RAQ JN58
202900 +15 2282  JA9FPI SP9UPH JO90
202900  +2  551  JA9FPI DL4RAQ R-19
202930 +15 2282  JA9FPI SP9UPH JO90
202930  +5  551  JA9FPI DL4RAQ R-19
202930  -2 1665  JA9FPI DK6ED JN49
203000 -12  816  JA9FPI DO8JB JO32
203000  +7  551  JA9FPI DL4RAQ R-19
203000  -5 1665  JA9FPI DK6ED JN49
203030 -15  816  JA9FPI DO8JB JO32
203030  -2 1665  JA9FPI DK6ED JN49
203100 -14  816  JA9FPI DO8JB JO32
173300 +21  624  JA9FPI YO2MAX KN15 (x2)

10m

UTC    dB Audio  Message
114500 -18 1955  JA9FPI HB9SNR JN36 (x2)

40m

UTC    dB Audio  Message
213430  -7  465  JA9FPI YO9BGU KN34 (x2)

160m

UTC    dB Audio  Message
190700  +1 2180  JA9FPI YL3CW -08 (x2)
190730  +5 1753  JA9FPI OM2WQ JN88 (x2)
190830  -1  996  JA9FPI RA3BY KO75 (x2)
190930  +5 1753  JA9FPI OM2WQ JN88 (x9)

20m

UTC    dB Audio  Message
135530  -3 1300  JA9FPI R7DX KN84 (x4)
132245 -14 1546  JA9FPI PD0NHM -18 (x2)

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