JA0WJA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JA0WJA, decoded by SO8OO in southeastern Poland. 23 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-09-18.
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 23 FT8 messages attributed to JA0WJA as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (96%), followed by 40 m (4%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-18 21:11 UTC
Observed FT8 message patterns
- Attributed sample
- 23 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -18 dB
- Estimated 10th-90th percentile
- -23 to -13 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 7, strong (≥ -8 dB) 1.
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 JA0WJA in decoded directed-looking exchanges:
Most frequent locator attributed to JA0WJA
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 · 8 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,497 km (approx.)
- Last such locator decoded
- 2026-06-18 22:57 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 | JA0WJA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 21:14 | 40m | - / -14 | IZ5IMD | +8 / - | 4 | ✓ Closing fragment |
| 08-31 22:02 | 40m | - / -21 | F8FUA | +4 / - | 5 | ✓ Closing fragment |
| 08-31 21:40 | 40m | - / -14 | HA9PP | -22 / - | 3 | ✓ Closing fragment |
| 07-31 21:38 | 20m | - / -2 | A71UN | -10 / - | 2 | ✓ Closing fragment |
| 07-31 21:34 | 20m | - / -18 | EA1B | -8 / - | 5 | Partial capture |
| 07-31 21:32 | 20m | - / -8 | F4IBJ | -8 / - | 3 | ✓ Closing fragment |
| 07-31 21:31 | 20m | - / -19 | EA8DHH | -9 / - | 2 | ✓ Closing fragment |
| 07-13 06:41 | 20m | - / - | UA3ZNQ | -16 / - | 2 | Partial capture |
| 07-13 06:35 | 20m | - / - | PD1ADA | -17 / - | 5 | Partial capture |
| 07-13 06:35 | 20m | - / - | SP6AXW | 0 / - | 4 | Partial capture |
| 06-27 08:28 | 20m | - / -16 | IR0RCAG | -8 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 214045 -22 2053 JA0WJA HA9PP R-14 (x3) 220245 +7 2155 JA0WJA F8FUA -21 (x5) 211115 -22 2066 IT9PHU JA0WJA 73 211400 +11 2216 JA0WJA IZ5IMD JN53 (x4) 212730 -11 2686 JA0WJA V51WH -03
UTC dB Audio Message 213100 -10 258 JA0WJA EA8DHH -19 (x2) 213230 -10 1628 JA0WJA F4IBJ IN96 (x3) 213400 -24 1628 JA0WJA EA5KB -08 213400 -9 2605 JA0WJA EA1B IN83 213430 -20 1628 JA0WJA RR73; JA4DWR <...> -10 213430 -5 2605 JA0WJA EA1B IN83 (x4) 213800 -21 1942 JA0WJA GM3JIM -05 213800 -11 2131 JA0WJA A71UN -02 (x2)
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