JA0VSH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM85

Receiver-side FT8 activity involving JA0VSH, decoded by SO8OO in southeastern Poland. 7 FT8 messages attributed to this token as transmitter, on 80m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-09-17.

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 7 FT8 messages attributed to JA0VSH as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -19 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-19 dB

Estimated median S/N

Bands

80m · 7

First attributed message: 2026-07-02
Last attributed message: 2026-09-17 17:00 UTC

Observed FT8 message patterns

Attributed sample: 7 messages
Active dates: 3 UTC dates
Estimated median S/N: -19 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.

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 JA0VSH in decoded directed-looking exchanges:

DN9SGE · Fed. Rep. of Germany G4PMZ · England ON4IQ · Belgium LA9GX · Norway F8NHF · France TN8GD · Republic of the Congo UT7HX · Ukraine YO8RQP · Romania RU4F · European Russia UX1AA · Ukraine

Most frequent locator attributed to JA0VSH

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: PM85 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,586 km (approx.)
Last such locator decoded: 2026-09-17 17:00 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	JA0VSH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-03 20:09	160m	- / -14	LA9GX	-9 / -	2	✓ Closing fragment
08-30 20:28	80m	- / -14	UX1AA	-2 / -	2	✓ Closing fragment
08-30 20:22	80m	-19 / -	EA8UP	- / -	2	Partial capture
08-24 10:52	10m	- / -12	G4PMZ	-16 / -	2	✓ Closing fragment
08-23 13:44	10m	- / -14	DN9SGE	-18 / -	4	✓ Closing fragment
08-23 13:33	10m	- / -1	ON4IQ	-4 / -	2	✓ Closing fragment
08-23 13:03	10m	- / -	DN9OPA	-20 / -	4	Partial capture
07-06 18:48	40m	- / -10	YO8RQP	-11 / -	3	✓ Closing fragment
07-06 18:46	40m	- / -	UR4QWW	-17 / -	3	Partial capture
07-06 18:45	40m	- / -	R2WAF	-6 / -	2	Partial capture
07-06 18:44	40m	- / -	UT7HX	+2 / -	2	✓ Closing fragment
07-02 21:59	20m	- / -12	TN8GD	-12 / -	2	✓ Closing fragment
07-02 19:33	80m	-24 / -9	RU4F	+2 / -10	3	✓ Full exchange observed
07-02 19:33	80m	- / -	RK6MC	+5 / -	6	Partial capture
07-02 19:27	80m	-19 / -	TN8GD	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
192915 -20 2834  TN8GD JA0VSH PM85
193300  -1 1449  JA0VSH RK6MC KN97
193315 -24 1608  RU4F JA0VSH -10
193330  +0 2472  JA0VSH RU4F R-09
193330  +6 1450  JA0VSH RK6MC KN97
193400  +4 2472  JA0VSH RU4F 73
193400  +7 1450  JA0VSH RK6MC KN97 (x4)
202245 -19  646  EA8UP JA0VSH PM85 (x2)
202830  -3 1580  JA0VSH UX1AA R-14 (x2)
170045 -22  382  AP2HA JA0VSH PM85

160m

UTC    dB Audio  Message
200915  -8 2154  JA0VSH LA9GX -14 (x2)

10m

UTC    dB Audio  Message
130345 -16 2155  JA0VSH DN9OPA JN38 (x4)
133315  -8 2599  JA0VSH ON4IQ -01 (x2)
134430 -22 1967  JA0VSH DN9SGE JO42 (x4)
105200 -16 1369  JA0VSH G4PMZ -12 (x2)

20m

UTC    dB Audio  Message
215900 -12 2329  JA0VSH TN8GD -12 (x2)
070330 -12  778  JA0VSH F8NHF 73

40m

UTC    dB Audio  Message
184445  +3 2573  JA0VSH UT7HX KN69 (x2)
184545  -7 2347  JA0VSH R2WAF KO81
184615 -17 1842  JA0VSH UR4QWW KN77 (x2)
184645  -6 2347  JA0VSH R2WAF KO81
184745 -16 1842  JA0VSH UR4QWW KN77
184815 -10  779  JA0VSH YO8RQP KN37 (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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