JA1PPW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM95

Receiver-side FT8 activity involving JA1PPW, decoded by SO8OO in southeastern Poland. 13 FT8 messages attributed to this token as transmitter, on 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-16 and 2026-08-07.

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 13 FT8 messages attributed to JA1PPW as the transmitting token by decoded message structure across 6 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 -15 dB; no usual signal pattern is inferred.

Overview

13
Messages attributed
6
UTC dates decoded
8
Active 15-min windows
-15 dB
Estimated median S/N

Bands

20m · 13
First attributed message: 2026-06-16
Last attributed message: 2026-08-07 20:38 UTC

Observed FT8 message patterns

Attributed sample
13 messages
Active dates
6 UTC dates
Estimated median S/N
-15 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 7, 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 JA1PPW in decoded directed-looking exchanges:

Most frequent locator attributed to JA1PPW

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
PM95 · 4 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,693 km (approx.)
Last such locator decoded
2026-07-29 20:09 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 UTCBandJA1PPW S/NCounterpartCounterpart S/NMsgsCapture
08-09 21:31 20m - / - Z34K -12 / - 3 Partial capture
08-09 21:31 20m - / -19 D2ACE -19 / - 2 ✓ Closing fragment
08-09 21:21 20m - / - F5PBG -9 / - 5 Partial capture
08-09 21:11 20m - / -3 7X5CY -1 / - 2 ✓ Closing fragment
08-08 20:06 20m - / - IK1EQE -15 / - 2 ✓ Closing fragment
08-07 20:43 20m - / -5 CN8NS -11 / - 3 Partial capture
08-07 20:36 20m -10 / +6 PI4DX -8 / - 5 ✓ Closing observed
08-07 20:27 20m - / - EA7EZ -11 / - 2 ✓ Closing fragment
08-06 20:19 20m - / -14 G0VXE +17 / - 2 ✓ Closing fragment
08-02 20:29 20m - / - IK5EEA -5 / - 3 Partial capture
07-29 20:23 20m - / -5 EA3BIC -2 / - 5 ✓ Closing fragment
07-29 20:12 20m - / -3 CN2DX +2 / - 2 ✓ Closing fragment
07-29 19:53 20m - / -8 IW5ABF -14 / - 4 ✓ Closing fragment
07-27 20:34 20m -14 / - RC1C - / -13 2 ✓ Closing fragment
07-27 20:31 20m - / - R2BGZ -16 / - 2 Partial capture
07-27 20:26 20m - / - IK2JYT -5 / - 3 Partial capture
07-26 20:28 20m - / - PA3KUS -8 / - 2 Partial capture
07-26 20:25 20m - / -2 OE9GWV -8 / - 4 ✓ Closing fragment
07-26 20:22 20m -16 / - IW9FRA -19 / - 2 ✓ Closing observed
07-26 20:21 20m -15 / +4 OS4K -7 / -20 5 ✓ Full exchange observed
07-26 20:20 20m -16 / - EA2DYB -5 / - 2 ✓ Closing observed
07-26 20:16 20m - / - PA3KUS -13 / - 2 Partial capture
07-26 20:10 20m - / -9 IZ2MZL +2 / - 4 ✓ Closing fragment
07-26 20:02 20m - / -8 IT9ACJ -12 / - 2 ✓ Closing fragment
07-18 20:44 20m - / - F4IBJ -6 / - 4 Partial capture
07-18 20:10 20m - / -16 CR7BRV -2 / - 2 ✓ Closing fragment
07-18 19:52 20m - / - OE9GWV 0 / - 5 Partial capture
07-18 19:51 20m - / -14 M0UTD -4 / - 3 ✓ Closing fragment
07-18 19:41 20m - / -9 RA3ZH +8 / - 3 ✓ Closing fragment
07-18 19:41 20m - / - OE9GWV -14 / - 3 Partial capture
07-18 19:29 20m - / - OK1KM -11 / - 8 Partial capture
07-09 20:03 20m - / -13 EA1A +12 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
200800 -14 2345  JA1PPW IK1EQE RR73
202345 -16  962  JA1PPW SV2HTW RR73
211100  -3  550  JA1PPW 7X5CY -03 (x2)
212145  -9 2526  JA1PPW F5PBG IN78 (x5)
213115 -19 2035  JA1PPW D2ACE -19
213145 -13 2527  JA1PPW Z34K KN01
213145 -19 2035  JA1PPW D2ACE RR73
213215 -12 2527  JA1PPW Z34K KN01 (x2)
202830  +4 2526  JA1PPW EA3NE JN11
40m 
UTC    dB Audio  Message
202915  -8  835  JA1PPW IK2JYT JN45

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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